Sensor protection device in soil bin of shield tunneling machine

Abstract

The invention discloses a sensor protection device in a shield tunneling machine soil bin, and relates to the technical field of shield tunneling machine sensor installation, the sensor protection device comprises a protector shell, the bottom end of the protector shell is provided with a link welding groove, and the top of the protector shell is provided with a sealing structure; a sensor fixing mechanism is arranged at the bottom of the protector shell, the sealing structure comprises a clamping support, the clamping support is fixedly connected to an inner cavity of the protector shell, a sealing rubber ring is arranged at the top end of the clamping support, and a tempered glass transparent cover is arranged at the top end of the sealing rubber ring. A sealing pressing ring is arranged at the top end of the tempered glass transparent cover. Through the protection device, the sensor in the soil bin of the shield tunneling machine is effectively protected, so that the service life of the sensor is remarkably prolonged, the maintenance cost of the shield tunneling machine is reduced, and the overall working efficiency and safety of the shield tunneling machine are improved.

Description

Technical Field

[0001] The invention relates to the technical field of shield machine sensor installation, in particular to a sensor protection device inside a shield machine soil bin. Background Art

[0002] With the rapid development of urban infrastructure construction, the performance and technical level of shield machines, as important equipment for modern tunnel excavation, play a vital role in ensuring tunnel construction safety and improving construction efficiency. In the actual use of shield machines, the environmental conditions inside the soil bin are extremely complex, and soil, mud, water and other materials frequently come into contact with various components of the shield machine, especially the sensors inside the soil bin, whose working environment is particularly harsh.

[0003] The soil bin sensor, as an important component of the shield machine, is responsible for real-time monitoring of important parameters such as pressure, humidity, and temperature inside the soil bin. It is a key equipment to ensure the normal operation of the shield machine and construction safety. However, in actual work, the soil, mud, water and other substances inside the soil bin are highly corrosive and abrasive, which can easily damage the sensor, thereby affecting the normal operation of the shield machine and even leading to construction safety accidents.

[0004] The traditional method of installing soil bin sensors is often to expose them directly inside the soil bin. Although the environmental parameters inside the soil bin can be directly obtained, due to the lack of necessary protection measures, the sensors are easily corroded and worn by substances such as soil and mud, resulting in sensor performance degradation, shortened service life, and even failure. In addition, sensors directly exposed inside the soil bin are difficult to clean and maintain effectively, further exacerbating the risk of sensor damage and failure.

[0005] In order to solve the above problems and improve the service life and reliability of the shield machine soil bin sensor, the present invention proposes a sensor protection device suitable for the shield machine soil bin. The device uses a special design and manufacturing process to wrap the sensor in a relatively closed and protective structure, so that the sensor can be relatively isolated from the external environment, reducing the direct erosion and wear of the sensor by soil, muddy water and other substances. At the same time, the device is also designed with a structure that is easy to clean and maintain, so that even if the sensor is contaminated to a certain extent during use, it can be easily cleaned and maintained, thereby ensuring that the sensor can always be in good working condition.

[0006] In summary, the present invention aims to solve the problem that the soil bin sensor of the shield machine is susceptible to erosion and wear, improve the service life and reliability of the sensor, and provide strong guarantee for the normal operation and construction safety of the shield machine. Summary of the invention

[0007] The purpose of the present invention is to provide a sensor protection device inside the soil bin of a shield machine in order to overcome the above-mentioned defects of the prior art.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sensor protection device inside a soil bin of a shield machine, comprising a protector shell, a connecting welding groove is arranged at the bottom end of the protector shell, a sealing structure is arranged at the top of the protector shell, a sensor fixing mechanism is arranged at the bottom of the protector shell, the sealing structure comprises a card holder, the card holder is fixedly connected to the inner cavity of the protector shell, a sealing rubber ring is arranged at the top end of the card holder, a tempered glass transparent cover is arranged at the top end of the tempered glass transparent cover, a sealing pressure ring is arranged at the top end of the protector shell, and a sealing structure is installed in the inner cavity of the protector shell. A fixing block, wherein the sealing fixing block is located at the top end of the sealing pressure ring, the sensor fixing mechanism includes a seat trapezoidal mounting groove, the seat trapezoidal mounting groove is opened at the bottom end of the inner wall of the protector shell, a sensor fixing base is arranged on the seat trapezoidal mounting groove, a trapezoidal groove is arranged at the bottom end of the sensor fixing base, a sensor connecting hole is arranged at the top end of the sensor fixing base, a limit block is installed above the inner cavity of the protector shell above the sensor fixing base, the sealing fixing block is installed by the mounting mechanism, and the limit block fixes the sensor fixing base by the extrusion mechanism.

[0009] As a further solution of the present invention: the installation mechanism includes a slot, the slot is opened on the inner wall of the protector shell, the inner wall of the slot is provided with a positioning groove, one end of the sealing fixing block is rotatably connected to a rotating column, the outer wall of the rotating column is fixedly connected to a first threaded rod, the outer wall of the first threaded rod is connected to a pushing block, the pushing block is slidably connected to the interior of the sealing fixing block, the interior of the sealing fixing block is located at one end of the pushing block and is slidably connected to a positioning block, and a first spring is connected between the positioning block and the sealing fixing block.

[0010] As a further solution of the present invention: the installation mechanism also includes a threaded groove, which is opened at one end of the sealing fixing block and is located on the outside of the rotating column. The internal thread of the threaded groove is connected to a shielding cover, and the outer wall of the shielding cover is provided with a circular hole. The inner wall of the circular hole is slidably connected with a cylinder, and one end of the rotating column is fixedly connected to a connecting plate, and the outer wall of the connecting plate is provided with a through hole.

[0011] As a further solution of the present invention: the extrusion mechanism includes a lower pressure block, which is slidably connected to the interior of the limit block and extends to the bottom end of the limit block, the top of the limit block is rotatably connected to a second threaded rod extending into the interior of the lower pressure block, the outer wall of the second threaded rod is fixedly connected to a toothed disk, the interior of the limit block is located on one side of the toothed disk and is slidably connected to a cross plate, the cross plate is fixedly connected to a tooth block and a pulling rod facing the side of the toothed disk, and the pulling rod extends out of the limit block.

[0012] As a further solution of the present invention: the extrusion mechanism also includes a vertical plate, which is slidably connected to the inside of the limit block and extends to the top of the limit block, a second spring is connected between the vertical plate and the limit block, a fixing rod is fixedly connected to the outer wall of the cross plate, an oblique groove is provided on the outer wall of the vertical plate, the fixing rod is slidably connected to the inner wall of the oblique groove, a movable groove for sliding the limit block and the vertical plate is provided inside the protector shell, a third spring is connected between the limit block and the movable groove, a clamping block is fixedly connected to the top of the movable groove, an extrusion rod is slidably connected to the inside of the protector shell, the top of the extrusion rod extends to the inner cavity of the slot, the bottom end of the extrusion rod extends to the inner wall of the movable groove, and a fourth spring is connected between the extrusion rod and the protector shell.

[0013] As a further solution of the present invention: the outer wall of the sealing fixing block is fitted with the inner wall of the slot, the outer wall of the pushing block is provided with a first threaded hole, the first threaded hole matches the first threaded rod, a first inclined surface is provided on one side of the positioning block, and the top outer wall of the positioning block is fitted with the inner wall of the positioning groove.

[0014] As a further solution of the present invention: the inner wall of the shielding cover fits with the outer wall of the rotating column, the outer wall of the cylinder fits with the inner wall of the through hole, and the outer wall of the cylinder fits tightly with the inner wall of the circular hole.

[0015] As a further solution of the present invention: a second threaded hole is formed at the top of the lower pressing block, and the second threaded hole matches the second threaded rod.

[0016] As a further solution of the present invention: the outer wall of the fixing rod is in contact with the inner wall of the inclined groove, and a second inclined surface is provided on the side of the clamping block facing the limiting block.

[0017] As a further solution of the present invention: one end of the tooth block is engaged with the toothed disc, and one end of the extrusion rod located in the inner cavity of the slot is triangular.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The protective device of the present invention adopts a sealing design, especially a non-shielded sealing mechanism, and a three-layer structure consisting of a sealing rubber ring, a tempered glass transparent cover and a sealing pressure ring to ensure effective isolation of the sensor from the external environment. The sealing rubber ring fits tightly with the inside of the protector shell, seals all gaps through its own deformation, and realizes the sealing of the inside of the protector shell, thereby effectively preventing erosion and wear of substances such as soil, mud and water; 2. The sensor fixing mechanism of the present invention adopts a trapezoidal mounting groove design, in which the sensor fixing base can rotate freely and be fixed by a limit block. This design is not only convenient for installation, but also can ensure a stable connection between the sensor and the sensor fixing base, reducing sensor damage caused by vibration and other reasons; 3. The design of the tempered glass transparent cover of the sealing structure of the present invention makes it possible to conveniently clean the sensor by removing the tempered glass transparent cover even if the sensor is contaminated to a certain extent during use. At the same time, the design of the sealing structure also ensures stability and reliability during the disassembly and installation process; 4. Through the protection device of the present invention, the sensor inside the soil bin of the shield machine is effectively protected, thereby significantly extending the service life of the sensor, which not only reduces the maintenance cost of the shield machine, but also improves the overall working efficiency and safety of the shield machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the installation of the sensor fixing base of the present invention; Figure 3 It is a schematic diagram of installing the tempered glass transparent cover of the present invention; Figure 4 is a cross-sectional view of the sealing fixing block of the present invention; Figure 5 is a cross-sectional view of the protector housing of the present invention; Figure 6 For the present invention Figure 5 The enlarged view of point A in the middle; Figure 7 is a cross-sectional view of a limit block of the present invention; Figure 8 It is a schematic structural diagram of the horizontal plate of the present invention.

[0020] In the figure: 1, protector housing; 2, link welding groove; 3, sealing structure; 301, card holder; 302, sealing rubber ring; 303, tempered glass transparent cover; 304, sealing pressure ring; 305, sealing fixing block; 4, sensor fixing mechanism; 401, sensor fixing base; 402, limit block; 403, seat trapezoidal mounting groove; 404, sensor connection hole; 405, trapezoidal groove; 5, installation mechanism; 501, slot; 502, positioning groove; 503, rotating column; 504, first threaded rod; 505, push block; 50 6. Positioning block; 507. First spring; 508. Threaded groove; 509. Shielding cover; 510. Round hole; 511. Cylinder; 512. Connecting plate; 513. Through hole; 6. Extrusion mechanism; 601. Pressing block; 602. Second threaded rod; 603. Toothed disc; 604. Horizontal plate; 605. Tooth block; 606. Pull rod; 607. Vertical plate; 608. Second spring; 609. Fixed rod; 610. Oblique groove; 611. Movable groove; 612. Third spring; 613. Block; 614. Extrusion rod; 615. Fourth spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which 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 limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0023] See also Figures 1 to 8 In an embodiment of the present invention, a sensor protection device inside a soil bin of a shield machine includes a protector housing 1, a connecting welding groove 2 is arranged at the bottom end of the protector housing 1, a sealing structure 3 is arranged at the top of the protector housing 1, a sensor fixing mechanism 4 is arranged at the bottom of the protector housing 1, the sealing structure 3 includes a card holder 301, the card holder 301 is fixedly connected to the inner cavity of the protector housing 1, a sealing rubber ring 302 is arranged at the top end of the card holder 301, a tempered glass transparent cover 303 is arranged at the top end of the sealing rubber ring 302, a sealing pressure ring 304 is arranged at the top end of the tempered glass transparent cover 303, a sealing fixing block 305 is installed in the inner cavity of the protector housing 1, and the sealing fixing block 305 is located at the top of the sealing pressure ring 304, the sensor fixing mechanism 4 includes a seat trapezoidal mounting groove 403, the seat trapezoidal mounting groove 403 is opened at the bottom end of the inner wall of the protector housing 1, a sensor fixing base 401 is arranged on the seat trapezoidal mounting groove 403, the bottom end of the sensor fixing base 401 is provided with a trapezoidal groove 405, the top of the sensor fixing base 401 is provided with a sensor connecting hole 404, the inner cavity of the protector housing 1 is located above the sensor fixing base 401 and a limit block 402 is installed, the sealing fixing block 305 is installed by the installation mechanism 5, and the limit block 402 fixes the sensor fixing base 401 by the extrusion mechanism 6.

[0024] In this embodiment: the protection device adopts a sealing design, especially a non-shielding sealing mechanism, and a three-layer structure consisting of a sealing rubber ring 302, a tempered glass transparent cover 303 and a sealing pressure ring 304, to ensure effective isolation of the sensor from the external environment. The sealing rubber ring 302 fits tightly with the inside of the protector housing 1, seals all gaps through its own deformation, and realizes the sealing of the inside of the protector housing 1, thereby effectively preventing erosion and wear of substances such as soil, mud and water.

[0025] The sensor fixing mechanism 4 adopts a trapezoidal mounting groove design, in which the sensor fixing base 401 can rotate freely and be fixed by a limit block 402. This design is not only easy to install, but also can ensure a stable connection between the sensor and the sensor fixing base 401, reducing sensor damage caused by vibration and other reasons.

[0026] The design of the tempered glass transparent cover 303 of the sealing structure 3 ensures that even if the sensor is contaminated to a certain extent during use, it can be easily cleaned by removing the tempered glass transparent cover 303. At the same time, the design of the sealing structure 3 also ensures stability and reliability during disassembly and installation.

[0027] By means of the protection device of the present invention, the sensor inside the earth bin of the shield machine is effectively protected, thereby significantly extending the service life of the sensor, which not only reduces the maintenance cost of the shield machine, but also improves the overall working efficiency and safety of the shield machine.

[0028] Please refer to Figures 3 to 5 The mounting mechanism 5 includes a slot 501, which is provided on the inner wall of the protector housing 1, and a positioning groove 502 is provided on the inner wall of the slot 501. One end of the sealing fixing block 305 is rotatably connected to a rotating column 503, and the outer wall of the rotating column 503 is fixedly connected to a first threaded rod 504, and the outer wall of the first threaded rod 504 is connected to a pushing block 505, and the pushing block 505 is slidably connected to the inside of the sealing fixing block 305, and the inside of the sealing fixing block 305 is located at one end of the pushing block 505 and is slidably connected to a positioning block 506 A first spring 507 is connected between the positioning block 506 and the sealing fixing block 305, and the mounting mechanism 5 also includes a threaded groove 508, which is opened at one end of the sealing fixing block 305 and is located on the outside of the rotating column 503, and the internal thread of the threaded groove 508 is connected to a shielding cover 509, and a circular hole 510 is opened on the outer wall of the shielding cover 509, and a cylinder 511 is slidably connected to the inner wall of the circular hole 510, and a connecting plate 512 is fixedly connected to one end of the rotating column 503, and a through hole 513 is opened on the outer wall of the connecting plate 512.

[0029] In this embodiment: when installing the sealing fixing block 305, the sealing fixing block 305 is inserted into the slot 501, and then the rotating column 503 is rotated. The rotation of the rotating column 503 drives the first threaded rod 504 to rotate, and the rotation of the first threaded rod 504 drives the pushing block 505 to move. The pushing block 505 moves and drives the positioning block 506 to move and insert into the positioning groove 502 to fix the sealing fixing block 305; then the shielding cover 509 is threaded into the thread groove 508. At this time, the rotation direction of the thread groove 508 is opposite to the rotation direction of the aforementioned first threaded rod 504. After completion, the cylinder 511 is installed into the circular hole 510. During this process, the cylinder 511 passes through the through hole 513, thereby fixing the rotating column 503 and the shielding cover 509 to prevent the shielding cover 509 and the rotating column 503 from loosening during use, causing the sealing fixing block 305 to loosen.

[0030] Please refer to Figures 5 to 8The extrusion mechanism 6 includes a lower pressing block 601, which is slidably connected to the interior of the limit block 402 and extends to the bottom end of the limit block 402. The top of the limit block 402 is rotatably connected to a second threaded rod 602 extending into the interior of the lower pressing block 601. The outer wall of the second threaded rod 602 is fixedly connected to a toothed disc 603. The interior of the limit block 402 is located on one side of the toothed disc 603 and is slidably connected to a horizontal plate 604. The horizontal plate 604 is fixedly connected to a toothed block 605 and a pulling rod 606 facing one side of the toothed disc 603. The pulling rod 606 extends out of the limit block 402. The extrusion mechanism 6 also includes a vertical plate 607, which is slidably connected to the interior of the limit block 402 and extends to the top of the limit block 402. The vertical plate 607 and the limit block 4 02, a second spring 608 is connected between the horizontal plate 604 and the vertical plate 607 ...14 is connected between the horizontal plate 604 and the vertical plate 607, a third spring 612 is connected between the limit block 402 and the movable groove 611, a clamping block 613 is fixedly connected to the top of the movable groove 611, an extrusion rod 614 is slidably connected to the inside of the protector shell 1, a top end of the extrusion rod 614 extends to the inner cavity of the slot 501, a bottom end of the extrusion rod 614 extends to the inner wall of the movable groove 611, and a fourth spring 615 is connected between the ex

[0031] In this embodiment: when fixing the sensor fixing base 401, the second threaded rod 602 is rotated, and the rotation of the second threaded rod 602 drives the lower pressing block 601 to move, and the displacement of the lower pressing block 601 squeezes the sensor fixing base 401, thereby squeezing and fixing the sensor fixing base 401.

[0032] When installing the sensor fixed base 401, the limit block 402 can be pushed to slide toward the cylinder 511, squeezing the third spring 612, and the vertical plate 607 moves to contact the block 613 for displacement until the vertical plate 607 passes over the block 613. The vertical plate 607 is displaced by the elastic force of the second spring 608 and engages with the block 613, positioning the limit block 402 in the cylinder 511 to prevent the limit block 402 from blocking the installation of the sensor fixed base 401; after completion, pull the pull rod 606, and the displacement of the pull rod 606 drives the horizontal plate 604 to move, and the displacement of the horizontal plate 604 drives the fixed rod 609 to slide in the inclined groove 610, pushing the vertical plate 607 to move and separate from the block 613, and the limit block 402 is displaced and reset by the elastic force of the third spring 612.

[0033] When the sensor is installed, the sealing fixing block 305 is installed into the slot 501, and the sealing fixing block 305 contacts the extrusion rod 614, pushing the extrusion rod 614 to move. The displacement of the extrusion rod 614 pushes the vertical plate 607 to move. The displacement of the vertical plate 607 drives the horizontal plate 604 to move through the fixing rod 609. The displacement of the horizontal plate 604 drives the tooth block 605 to move. The displacement of the tooth block 605 engages with the toothed disc 603 to prevent the second threaded rod 602 from rotating, so that the sensor fixing base 401 may loosen during the use of the protector housing 1, causing the sensor to loosen.

[0034] Please refer to Figures 3 to 5 The outer wall of the sealing fixing block 305 fits with the inner wall of the slot 501, a first threaded hole is opened on the outer wall of the pushing block 505, and the first threaded hole matches the first threaded rod 504. A first inclined surface is provided on one side of the positioning block 506, and the top outer wall of the positioning block 506 fits with the inner wall of the positioning groove 502.

[0035] In this embodiment: the sealing fixing block 305 is inserted into the slot 501, and then the rotating column 503 is rotated. The rotation of the rotating column 503 drives the first threaded rod 504 to rotate. The rotation of the first threaded rod 504 drives the pushing block 505 to move. The pushing block 505 moves the positioning block 506 to move and insert it into the positioning groove 502, thereby fixing the sealing fixing block 305.

[0036] Please refer to Figures 3 to 5 The inner wall of the shielding cover 509 fits with the outer wall of the rotating column 503 , the outer wall of the cylinder 511 fits with the inner wall of the through hole 513 , and the outer wall of the cylinder 511 fits tightly with the inner wall of the circular hole 510 .

[0037] In this embodiment: the shielding cover 509 is then threaded into the threaded groove 508. After completion, the cylinder 511 is installed into the circular hole 510. During this process, the cylinder 511 passes through the through hole 513, thereby fixing the rotating column 503 and the shielding cover 509 to prevent the shielding cover 509 and the rotating column 503 from loosening during use, causing the sealing fixing block 305 to loosen.

[0038] Please refer to Figures 5 to 8 A second threaded hole is formed at the top of the lower pressing block 601 , and the second threaded hole matches the second threaded rod 602 .

[0039] In this embodiment: the second threaded rod 602 is rotated, and the rotation of the second threaded rod 602 drives the lower pressing block 601 to move, and the displacement of the lower pressing block 601 presses the sensor fixing base 401, thereby pressing and fixing the sensor fixing base 401.

[0040] Please refer to Figures 5 to 8The outer wall of the fixing rod 609 is in contact with the inner wall of the inclined groove 610 , and a second inclined surface is provided on the side of the clamping block 613 facing the limiting block 402 .

[0041] In this embodiment: the limit block 402 can be pushed to slide toward the cylinder 511, causing compression on the third spring 612, and the vertical plate 607 moves to contact the block 613 for displacement until the vertical plate 607 passes over the block 613. The vertical plate 607 is displaced by the elastic force of the second spring 608 and engages with the block 613, positioning the limit block 402 in the cylinder 511 to prevent the limit block 402 from blocking the installation of the sensor fixed base 401; after completion, pull the pull rod 606, and the displacement of the pull rod 606 drives the horizontal plate 604 to move, and the displacement of the horizontal plate 604 drives the fixed rod 609 to slide in the inclined groove 610, pushing the vertical plate 607 to move and separate from the block 613, and the limit block 402 is displaced and reset by the elastic force of the third spring 612.

[0042] Please refer to Figures 5 to 8 One end of the tooth block 605 is engaged with the toothed disc 603 , and one end of the extrusion rod 614 located in the inner cavity of the slot 501 is triangular.

[0043] In this embodiment: when the sealing fixing block 305 is installed into the slot 501, the sealing fixing block 305 contacts the extrusion rod 614, pushing the extrusion rod 614 to move, the displacement of the extrusion rod 614 pushes the vertical plate 607 to move, the displacement of the vertical plate 607 drives the horizontal plate 604 to move through the fixing rod 609, the displacement of the horizontal plate 604 drives the tooth block 605 to move, the displacement of the tooth block 605 engages with the toothed disc 603 to prevent the second threaded rod 602 from rotating.

[0044] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sensor protection device inside a shield machine soil bin, characterized in that: The invention comprises a protector shell (1), wherein the bottom end of the protector shell (1) is provided with a connecting welding groove (2), the top of the protector shell (1) is provided with a sealing structure (3), the bottom of the protector shell (1) is provided with a sensor fixing mechanism (4), the sealing structure (3) comprises a card holder (301), the card holder (301) is fixedly connected to the inner cavity of the protector shell (1), the top end of the card holder (301) is provided with a sealing rubber ring (302), the top end of the sealing rubber ring (302) is provided with a tempered glass transparent cover (303), the top end of the tempered glass transparent cover (303) is provided with a sealing pressure ring (304), the inner cavity of the protector shell (1) is installed with a sealing fixing block (305), the sealing fixing block (305) is located at the sealing pressure ring (3 04), the sensor fixing mechanism (4) comprises a seat trapezoidal mounting groove (403), the seat trapezoidal mounting groove (403) is opened at the bottom end of the inner wall of the protector housing (1), a sensor fixing base (401) is arranged on the seat trapezoidal mounting groove (403), a trapezoidal groove (405) is arranged at the bottom end of the sensor fixing base (401), a sensor connection hole (404) is opened at the top end of the sensor fixing base (401), a limit block (402) is installed above the sensor fixing base (401) in the inner cavity of the protector housing (1), the sealing fixing block (305) is installed by the installation mechanism (5), and the limit block (402) is fixed to the sensor fixing base (401) by the extrusion mechanism (6).

2. A sensor protection device inside a shield machine soil bin according to claim 1, characterized in that: The mounting mechanism (5) comprises a slot (501), the slot (501) being provided on the inner wall of the protector housing (1), the inner wall of the slot (501) being provided with a positioning slot (502), one end of the sealing fixing block (305) being rotatably connected to a rotating column (503), the outer wall of the rotating column (503) being fixedly connected to a first threaded rod (504), the outer wall of the first threaded rod (504) being connected to a pushing block (505), the pushing block (505) being slidably connected to the interior of the sealing fixing block (305), the interior of the sealing fixing block (305) being located at one end of the pushing block (505) being slidably connected to a positioning block (506), and a first spring (507) being connected between the positioning block (506) and the sealing fixing block (305).

3. A sensor protection device inside a shield machine soil bin according to claim 2, characterized in that: The mounting mechanism (5) further comprises a threaded groove (508), wherein the threaded groove (508) is formed at one end of the sealing fixing block (305) and is located on the outside of the rotating column (503); the inner thread of the threaded groove (508) is connected to a shielding cover (509); a circular hole (510) is formed on the outer wall of the shielding cover (509); a circular column (511) is slidably connected to the inner wall of the circular hole (510); a connecting plate (512) is fixedly connected to one end of the rotating column (503); and a through hole (513) is formed on the outer wall of the connecting plate (512).

4. A sensor protection device inside a shield machine soil bin according to claim 3, characterized in that: The extrusion mechanism (6) comprises a lower pressing block (601), the lower pressing block (601) is slidably connected to the interior of the limiting block (402) and extends to the bottom end of the limiting block (402), the top end of the limiting block (402) is rotatably connected to a second threaded rod (602) extending into the interior of the lower pressing block (601), the outer wall of the second threaded rod (602) is fixedly connected to a toothed disc (603), the interior of the limiting block (402) is located on one side of the toothed disc (603) and is slidably connected to a transverse plate (604), the transverse plate (604) is fixedly connected to a toothed block (605) and a pulling rod (606) on the side facing the toothed disc (603), and the pulling rod (606) extends out of the limiting block (402).

5. A sensor protection device inside a shield machine soil bin according to claim 4, characterized in that: The squeezing mechanism (6) further comprises a vertical plate (607), the vertical plate (607) being slidably connected to the interior of the limit block (402) and extending to the top of the limit block (402), a second spring (608) being connected between the vertical plate (607) and the limit block (402), a fixing rod (609) being fixedly connected to the outer wall of the cross plate (604), an oblique groove (610) being provided on the outer wall of the vertical plate (607), the fixing rod (609) being slidably connected to the inner wall of the oblique groove (610), and a spring for the limit block (402) and the second spring (608) being provided inside the protector housing (1). The vertical plate (607) slides in a movable groove (611), a third spring (612) is connected between the limit block (402) and the movable groove (611), a clamping block (613) is fixedly connected to the top of the movable groove (611), an extrusion rod (614) is slidably connected to the inside of the protector housing (1), the top of the extrusion rod (614) extends to the inner cavity of the slot (501), the bottom of the extrusion rod (614) extends to the inner wall of the movable groove (611), and a fourth spring (615) is connected between the extrusion rod (614) and the protector housing (1).

6. A sensor protection device inside a shield machine soil bin according to claim 3, characterized in that: The outer wall of the sealing fixing block (305) is in contact with the inner wall of the slot (501); the outer wall of the pushing block (505) is provided with a first threaded hole, the first threaded hole matches the first threaded rod (504); a first inclined surface is provided on one side of the positioning block (506); the top outer wall of the positioning block (506) is in contact with the inner wall of the positioning groove (502).

7. The sensor protection device inside the soil bin of a shield machine according to claim 3, characterized in that: The inner wall of the shielding cover (509) fits with the outer wall of the rotating column (503), the outer wall of the cylinder (511) fits with the inner wall of the through hole (513), and the outer wall of the cylinder (511) fits tightly with the inner wall of the circular hole (510).

8. The sensor protection device inside the soil bin of a shield machine according to claim 5, characterized in that: A second threaded hole is formed at the top of the lower pressing block (601), and the second threaded hole matches the second threaded rod (602).

9. The sensor protection device inside the soil bin of a shield machine according to claim 5, characterized in that: The outer wall of the fixing rod (609) is in contact with the inner wall of the inclined groove (610), and a second inclined surface is provided on a side of the clamping block (613) facing the limiting block (402).

10. The sensor protection device inside the soil bin of a shield machine according to claim 5, characterized in that: One end of the tooth block (605) is engaged with the toothed disc (603), and one end of the extrusion rod (614) located in the inner cavity of the slot (501) is triangular.

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