Shield tunneling machine soil bin pressure sensor detection device

Abstract

The invention discloses a shield tunneling machine soil bin pressure sensor detection device, which comprises a pressure sensor, a protective shell, a transmission line, a water spraying ring, a driving cylinder and a detector, and is characterized in that the pressure sensor is used for detecting the soil pressure in a shield tunneling machine soil bin in real time; the protective shell is mounted at the rear end of the pressure sensor, and the protective shell and the pressure sensor are sealed; one end of the transmission line is connected with the rear end of the pressure sensor, the other end extends out of the rear end of the protective shell, and the transmission line and the rear end of the protective shell are sealed; the water spraying ring is arranged at the front end of the protective shell; the water spraying end of the water spraying ring is aligned with the detection surface of the pressure sensor; the water spraying ring is connected with a pipeline in the protective shell; the driving cylinder is arranged on the water spraying ring, the output end of the driving cylinder is connected with a scraping plate, the scraping plate is attached to the detection face of the pressure sensor, and the driving cylinder drives the sliding plate to clean the detection face of the pressure sensor; and the detector is electrically connected with the pressure sensor through a transmission line.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine (TBM) testing technology, specifically to a TBM soil chamber pressure sensor testing device. Background Technology

[0002] Precise control of soil pressure is a crucial aspect of ensuring construction safety and project quality during shield tunnel construction. Soil pressure sensors, as key devices for monitoring pressure changes within the soil chamber, directly impact the adjustment of shield machine propulsion parameters, thus affecting surface settlement control, tunnel structural stability, and construction efficiency.

[0003] Existing invention patent CN211553179U discloses a shield machine soil chamber pressure sensor detection device, including a cylinder, a sensor body, a sealing device, and a pressure device. The cylinder is a sealed circular cylinder. The sensor body is located at the bottom of the cylinder through the sealing device, and the pressure device is located in the upper part of the inner cavity of the cylinder. The sealing device includes a sealing plate, and the sensor body is fixedly installed on the top of the sealing plate. The top of the sensor body penetrates the bottom plate of the cylinder and extends into the interior of the cylinder. A rubber gasket is provided between the sealing plate and the bottom plate of the cylinder, and the sealing plate, rubber gasket, and bottom plate of the cylinder are connected by bolts. This shield machine soil chamber pressure sensor detection device, by setting up a sealing device and a pressure device, allows the device to verify the air pressure inside the device bidirectionally through the pressure gauge and the change of the weight, preventing detection errors caused by the inaccuracy of the pressure gauge after long-term use and ensuring the accuracy of the detection.

[0004] The aforementioned patent provides a tunnel boring machine (TBM) soil chamber pressure sensor detection device that primarily addresses the problem of existing sensor detection equipment relying solely on barometers to determine air pressure. If the barometer becomes inaccurate after prolonged use, it can easily lead to inaccurate sensor readings. However, in actual TBM construction scenarios, soil chamber pressure sensors also face two other key issues: first, the sensor, being constantly inside the soil chamber, is subjected to continuous pressure and friction from the soil, easily causing damage to the sensor itself; second, during use, soil continuously accumulates on the sensor surface, and once this accumulated soil hardens, it directly interferes with the sensor's normal perception of soil chamber pressure, thus affecting the accuracy of the TBM's soil chamber pressure monitoring data. Summary of the Invention

[0005] The purpose of this invention is to provide a soil pressure sensor detection device for tunnel boring machines (TBMs), aiming to solve the dual technical pain points faced by existing TBM soil pressure sensors during long-term service: First, the sensor is constantly exposed to the soil environment inside the soil chamber, continuously subjected to the squeezing and friction of the soil, which easily causes damage to the main structure, leading to frequent equipment failures and shortened service life; Second, during use, soil tends to accumulate on the sensor surface and key detection areas. After a period of time, this accumulated soil hardens and clumps, directly covering the sensor detection end, interfering with its accurate capture and transmission of soil pressure signals, ultimately causing deviations in the monitoring data of the TBM soil pressure, which adversely affects construction safety control and project quality stability.

[0006] This invention is implemented as follows:

[0007] A pressure sensor detection device for soil chamber of a tunnel boring machine includes a pressure sensor, which is used to detect the soil pressure inside the soil chamber of the tunnel boring machine in real time.

[0008] A protective housing is installed at the rear end of the pressure sensor, and a seal is provided between the protective housing and the pressure sensor;

[0009] A transmission line, one end of which is connected to the rear end of the pressure sensor, and the other end protrudes from the rear end of the protective housing, and the transmission line and the rear end of the protective housing are sealed together.

[0010] A water spray ring is disposed at the front end of the protective housing, and the water spray end of the water spray ring is aligned with the detection surface of the pressure sensor; the water spray ring is connected to the pipeline inside the protective housing.

[0011] A drive cylinder is mounted on the water spray ring, and a scraper is connected to the output end of the drive cylinder. The scraper is in contact with the detection surface of the pressure sensor, and the drive cylinder drives the slide plate to clean the detection surface of the pressure sensor.

[0012] The detector is electrically connected to the pressure sensor via a transmission line.

[0013] Preferably, the pressure sensor has a flange at its rear side, and the flange has a plurality of flange holes evenly distributed on it. The pressure sensor has a plug at the middle of its rear end, and the plug has a first male connector at the middle of its middle. The pressure sensor has a sealing gasket along the outer side of the plug on its rear end face.

[0014] Preferably, the protective housing has multiple fixing grooves evenly distributed on its front side, a fixing foot at the center of its rear end, and multiple fixing holes evenly distributed on the edge of the fixing foot; a sealing ring at the center of the rear end of the protective housing, with a wire through hole in the center of the sealing ring; a water supply pipe is provided inside the protective housing, with its rear end protruding from the protective housing, and a solenoid valve at one end of the water supply pipe protruding from the protective housing, the solenoid valve having a first connecting line, and a first connecting plug at the end of the first connecting line, the first connecting plug being electrically connected to the detector; a mounting groove is provided on the front side of the protective housing, with a insertion hole in the center of the mounting groove, the plug being inserted into the insertion hole; multiple connecting grooves are evenly distributed on the edge of the mounting groove, and a pressure groove is provided around the outside of the insertion hole; a sealing gasket is pressed tightly onto the pressure groove to achieve a seal between the pressure sensor and the protective housing; a water outlet pipe is provided on the side of the protective housing, with a connecting cap at the end of the water outlet pipe, and the water outlet pipe is connected to the water supply pipe.

[0015] Preferably, one end of the transmission line is provided with a first female connector, which is connected to a first male connector; the other end of the transmission line is provided with a second female connector; and an adapter cap is rotatably connected to the bottom end of the second female connector.

[0016] Preferably, the inner side of the spray ring is evenly provided with multiple nozzles, which are oriented towards the pressure sensor; the side of the spray pipe is provided with multiple fixing plates, which are engaged in the fixing groove, and the fixing plates are provided with multiple countersunk holes, through which the spray pipe is fixed to the protective shell by bolts; one of the fixing plates is provided with a mounting platform, which has a through hole in the center and symmetrical slots on both sides; the side of the spray ring is provided with a connecting pipe, which is connected to the water storage pipe.

[0017] Preferably, the drive cylinder has a retaining plate on both sides at the bottom, and the retaining plate has multiple bolt holes. The retaining plate engages with the retaining groove, and the drive cylinder is fixed to the mounting platform by bolts passing through the retaining groove. The output end of the drive cylinder has a telescopic rod, and the bottom end of the telescopic rod has a stud, on which a pressure cap is threaded.

[0018] Preferably, the scraper is provided with a mounting plate at the top, and a sleeve plate is provided at the top of the mounting plate. The sleeve plate and the mounting plate are vertically connected, and the sleeve plate is provided with a sleeve hole in the middle. The sleeve hole is fitted onto the stud, and the pressure cap is pressed against the bottom surface of the sleeve plate.

[0019] Preferably, the detector has a second male connector on the top, a display screen on the top of the front of the detector, and a control panel below the display screen on the front of the detector; a support foot is provided in the middle of the bottom surface of the detector, a base plate is provided on the bottom surface of the support foot, and bottom holes are provided at the corners of the base plate.

[0020] Preferably, it also includes a high-pressure water pump, the high-pressure water pump end is provided with two external pipes, the ends of the external pipes are provided with external caps, the two external pipes are divided into the water inlet end and the water outlet end of the high-pressure water pump, the external pipe and the external cap of the water outlet end of the high-pressure water pump are connected to the rear end of the water supply pipe, the side of the high-pressure water pump is provided with a second connecting line, and the end of the second connecting line is provided with a second connecting plug.

[0021] Preferably, the detector is electrically connected to the high-pressure water pump. The detector integrates an MCU control module, which is connected to a signal acquisition module, a signal processing module, a storage module, a power supply module, a communication module, a solenoid valve control module, and a water pump control module. The MCU control module processes various data from the entire detection device. The signal acquisition module works with a pressure sensor to acquire pressure data within the soil chamber. The signal processing module processes the acquired pressure signals. The storage module stores the detection data. The communication module transmits the processed data to the tunnel boring machine control system. The solenoid valve control module controls the operation of the solenoid valve, and the water pump control module controls the operation of the high-pressure water pump.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention uses a water spray ring at the end of the pressure sensor to clean the surface of the pressure sensor by using a high-pressure water jet, thus preventing the accumulation of dirt on the surface of the pressure sensor and affecting the detection accuracy. At the same time, a drive cylinder is installed on the water spray ring, which can drive a scraper to scrape the detection surface of the pressure sensor back and forth, thereby cleaning the dirt on the detection surface of the pressure sensor and effectively ensuring the accuracy of the pressure sensor detection inside the tunnel boring machine's soil chamber.

[0024] 2. The present invention provides a protective shell at the rear end of the pressure sensor. The protective shell can protect the wiring position of the pressure sensor and ensure that the wiring position of the pressure sensor is sealed, thereby preventing the wiring position of the pressure sensor from being corroded and damaged.

[0025] 3. The present invention has a water supply pipe inside the protective shell, which can ensure the stability of the water supply pipe and facilitate the stable supply of water to the spray ring, so as to facilitate the spray pipe to rinse the surface of the pressure sensor. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the pressure sensor structure of the present invention;

[0028] Figure 3This is a schematic diagram of the protective shell of the present invention from a rear-end oblique downward view;

[0029] Figure 4 This is a schematic diagram of the protective shell of the present invention from a front-end oblique downward view.

[0030] Figure 5 This is a schematic diagram of the transmission line structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the water spray ring structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the drive cylinder of the present invention;

[0033] Figure 8 This is a schematic diagram of the scraper structure of the present invention;

[0034] Figure 9 This is a schematic diagram of the water pump of the present invention;

[0035] Figure 10 This is a schematic diagram of the detector of the present invention;

[0036] Figure 11 This is a structural block diagram of the internal structure of the detector of the present invention.

[0037] In the diagram: 1. Pressure sensor; 11. Flange; 12. Sealing gasket; 13. Plug; 14. First male connector; 15. Flange hole; 2. Protective housing; 21. Fixing groove; 22. Fixing foot; 23. Fixing hole; 24. Sealing ring; 241. Wiring hole; 25. Water supply pipe; 251. Solenoid valve; 252. First connecting line; 253. First connecting plug; 26. Mounting groove; 261. Connecting groove; 27. Socket; 28. Pressure groove; 29. ​​Water outlet pipe; 291. Connecting cap; 3. Transmission line; 31. First female connector; 32. Second female connector; 33. Adapter cap; 4. 41. Spray ring; 42. Nozzle; 43. Mounting platform; 44. Perforation; 45. Slot; 46. Fixing plate; 47. Countersunk hole; 58. Connecting pipe; 59. Drive cylinder; 50. Clamping plate; 51. Bolt hole; 52. Telescopic rod; 53. Stud; 54. Pressure cap; 55. Scraper; 60. Mounting plate; 61. Socket plate; 62. Socket hole; 71. High-pressure water pump; 72. External pipe; 73. External cap; 74. Second connecting line; 75. Second connecting plug; 86. Detector; 87. Second connecting male; 88. Display screen; 89. Control panel; 80. Support foot; 81. Base plate; 82. Bottom hole. Detailed Implementation

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0040] Example 1

[0041] like Figure 1 As shown, a detection device for a tunnel boring machine (TBM) soil chamber pressure sensor 1 includes a pressure sensor 1, a protective housing 2, a transmission line 3, a water spray ring 4, a drive cylinder 5, and a detector 8. The pressure sensor 1 is used to detect the soil pressure inside the TBM soil chamber in real time. The protective housing 2 is installed at the rear end of the pressure sensor 1 to protect the wiring position at the rear end of the pressure sensor 1. The protective housing 2 and the pressure sensor 1 are sealed together. One end of the transmission line 3 is connected to the rear end of the pressure sensor 1, and the other end protrudes from the rear end of the protective housing 2, facilitating the connection between the pressure sensor 1 and the detector 8. The transmission line 3 and the rear end of the protective housing 2 are also sealed together. The water spray ring 4 is positioned at the front end of the protective housing 2, with the spray nozzle aligned with the detection surface of the pressure sensor 1. The water spray ring 4 is connected to the internal piping of the protective housing 2. High-pressure water jets are sprayed from the water spray ring 4 to flush and clean the detection surface of the pressure sensor 1. The drive cylinder 5 is mounted on the water spray ring 4, and the output end of the drive cylinder 5 is connected to a scraper 6. The scraper 6 is in contact with the detection surface of the pressure sensor 1. The drive cylinder 5 drives the slide plate to clean the detection surface of the pressure sensor 1. This makes it convenient to scrape the dirt off the detection surface of the pressure sensor 1 when it cannot be washed clean. The drive cylinder 5 is one of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. The detector 8 is electrically connected to the pressure sensor 1 through the transmission line 3, which makes it convenient for the detector 8 to be used in conjunction with the pressure sensor 1.

[0042] like Figure 2As shown, the pressure sensor 1 has a flange 11 at its rear end. The flange 11 has multiple evenly spaced flange holes 15. The flange 11 and the flange holes 15 are fitted together to facilitate the use of bolts to secure the pressure sensor 1 to the protective housing 2. A plug 13 is located at the center of the rear end of the pressure sensor, allowing for easy insertion into the protective housing 2. A first male connector 14 is located at the center of the plug 13, facilitating connection to the transmission line 3. A sealing gasket 12 is located on the outer side of the plug 13 at the rear end of the pressure sensor 1, sealing the pressure sensor 1 and the protective housing 2.

[0043] like Figure 3 and Figure 4 As shown, the protective shell 2 has multiple evenly spaced fixing grooves 21 on its front side. These grooves facilitate the installation of the water spray ring 4, making it easy to fix and use. The protective shell 2 has a fixing foot 22 at its rear center, with multiple evenly spaced fixing holes 23 along its edges. The fixing foot 22 and the fixing holes 23 work together to secure the protective shell 2 in a designated position using bolts. The protective shell 2 has a sealing ring 24 at its rear center, with a wire hole 241 in its center. The sealing ring 24 and the wire hole 241 work together to seal the transmission line 3 between the protective shell 2 and the protective shell 2. The protective shell 2 has a water supply pipe 25 inside, with its rear end protruding from the protective shell 2. This structure allows the water supply pipe 25 to be connected to the tunnel boring machine's water supply system, facilitating the supply of water to the water spray ring 4. Furthermore, a solenoid valve 251 is installed at one end of the water supply pipe 25 protruding from the protective housing 2. The solenoid valve 251 has a first connecting line 252, and a first connecting plug 253 is installed at the end of the first connecting line 252. The first connecting plug 253 is electrically connected to the detector 8. The solenoid valve 251 facilitates the opening and closing of the water supply pipe 25, making its use convenient. A mounting groove 26 is provided on the front face of the protective housing 2, which facilitates the installation of the pressure sensor 1. A socket 27 is provided in the middle of the mounting groove 26, into which the plug 13 is inserted for stable installation and fixation of the pressure sensor 1. Multiple connecting grooves 261 are evenly distributed along the edge of the mounting groove 26, which facilitate the mating of the pressure sensor 1, ensuring its stable installation inside the mounting groove 26. The mounting groove 26 has a ring of pressure groove 28 around the outside of the insertion hole 27; the sealing gasket 12 is pressed on the pressure groove 28 to achieve a seal between the pressure sensor 1 and the protective housing 2; the protective housing 2 has a water outlet pipe 29 on its side, and the end of the water outlet pipe 29 has a connecting cap 291, and the water outlet pipe 29 is connected to the water supply pipe 25. The cooperation between the water outlet pipe 29 and the connecting cap 291 is to facilitate connection with the water spray ring 4.

[0044] like Figure 5As shown, one end of the transmission line 3 is provided with a first female connector 31, which is connected to the first male connector 14; the other end of the transmission line 3 is provided with a second female connector 32, which is connected to the detector 8, so that the transmission line 3 can be stably connected to the detector 8; the bottom end of the second female connector 32 is rotatably connected with an adapter cap 33.

[0045] like Figure 6 As shown, multiple nozzles 41 are evenly arranged on the inner side of the water spray ring 4, with the nozzles 41 facing the pressure sensor 1. This structure facilitates the spraying of high-pressure water jets from the nozzles 41 to flush and clean the detection surface of the pressure sensor 1. Multiple fixing plates 45 are provided on the side of the water spray pipe, which are engaged inside the fixing groove 21. Multiple countersunk holes 46 are provided on the fixing plates 45, and the water spray pipe is fixed to the protective housing 2 by bolts passing through the countersunk holes 46, ensuring stable installation of the water spray pipe on the protective housing 2. One of the fixing plates 45 is provided with a mounting platform 42, which facilitates the installation of the drive cylinder 5. A through hole 43 is provided in the center of the mounting platform 42, allowing the output end of the drive cylinder 5 to pass through the fixing plate 45. The mounting platform 42 is symmetrically provided with slots 44 on both sides, facilitating connection between the drive cylinder 5 and the mounting platform 42. A connecting pipe 47 is provided on the side of the water spray ring 4, which is connected to the water storage pipe.

[0046] like Figure 7 As shown, the bottom of both sides of the drive cylinder 5 is provided with a retaining plate 51, and the retaining plate 51 has multiple bolt holes 52. The retaining plate 51 is engaged with the retaining groove 44. The drive cylinder 5 is fixed to the mounting platform 42 by bolts passing through the retaining groove 44. This structure ensures that the drive cylinder 5 is stably installed on the mounting platform 42. The output end of the drive cylinder 5 is provided with a telescopic rod 53, which facilitates the up and down movement of the scraper 6. The bottom end of the telescopic rod 53 is provided with a stud 54, and a pressure cap 55 is threaded onto the stud 54. The stud 54 and the pressure cap 55 facilitate the connection between the telescopic rod 53 and the scraper 6.

[0047] like Figure 8 As shown, the scraper 6 has a mounting plate 61 on its top, and a connecting plate 62 on its top. The connecting plate 62 and the mounting plate 61 are vertically connected. The fit between the mounting plate 61 and the connecting plate 62 facilitates the connection between the scraper 6 and the telescopic rod 53. The connecting plate 62 has a connecting hole 63 in its middle, which is fitted onto the stud 54. The pressure cap 55 presses against the bottom surface of the connecting plate 62. This structure ensures that the scraper 6 is stably installed at the bottom end of the telescopic rod 53.

[0048] like Figure 10As shown, the top of the detector 8 is equipped with a second male connector 81, which facilitates connection between the detector 8 and the transmission line 3. A display screen 82 is located on the top front of the detector 8, which displays the test data. Below the display screen 82 on the front of the detector 8 is a control panel 83, which facilitates operation of the entire testing device. A support foot 84 is located in the center of the bottom surface of the detector 8, and a base plate 85 is located on the bottom surface of the support foot 84. Bottom holes 86 are located at the corners of the base plate 85. The support foot 84, in conjunction with the base plate 85, facilitates the installation and fixation of the detector 8, ensuring its stable positioning.

[0049] Example 2

[0050] like Figure 1 As shown, a detection device for a tunnel boring machine (TBM) soil chamber pressure sensor 1 includes a pressure sensor 1, a protective housing 2, a transmission line 3, a water spray ring 4, a drive cylinder 5, and a detector 8. The pressure sensor 1 is used to detect the soil pressure inside the TBM soil chamber in real time. The protective housing 2 is installed at the rear end of the pressure sensor 1 to protect the wiring position at the rear end of the pressure sensor 1. The protective housing 2 and the pressure sensor 1 are sealed together. One end of the transmission line 3 is connected to the rear end of the pressure sensor 1, and the other end protrudes from the rear end of the protective housing 2, facilitating the connection between the pressure sensor 1 and the detector 8. The transmission line 3 and the rear end of the protective housing 2 are also sealed together. The water spray ring 4 is positioned at the front end of the protective housing 2, with the spray nozzle aligned with the detection surface of the pressure sensor 1. The water spray ring 4 is connected to the internal piping of the protective housing 2. High-pressure water jets are sprayed from the water spray ring 4 to flush and clean the detection surface of the pressure sensor 1. The drive cylinder 5 is mounted on the water spray ring 4, and the output end of the drive cylinder 5 is connected to a scraper 6. The scraper 6 is in contact with the detection surface of the pressure sensor 1. The drive cylinder 5 drives the slide plate to clean the detection surface of the pressure sensor 1. This makes it convenient to scrape the dirt off the detection surface of the pressure sensor 1 when it cannot be washed clean. The drive cylinder 5 is one of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. The detector 8 is electrically connected to the pressure sensor 1 through the transmission line 3, which makes it convenient for the detector 8 to be used in conjunction with the pressure sensor 1.

[0051] like Figure 2 As shown, the pressure sensor 1 has a flange 11 at its rear end. The flange 11 has multiple evenly spaced flange holes 15. The flange 11 and the flange holes 15 are fitted together to facilitate the use of bolts to secure the pressure sensor 1 to the protective housing 2. A plug 13 is located at the center of the rear end of the pressure sensor, allowing for easy insertion into the protective housing 2. A first male connector 14 is located at the center of the plug 13, facilitating connection to the transmission line 3. A sealing gasket 12 is located on the outer side of the plug 13 at the rear end of the pressure sensor 1, sealing the pressure sensor 1 and the protective housing 2.

[0052] like Figure 3 and Figure 4 As shown, the protective shell 2 has multiple evenly spaced fixing grooves 21 on its front side. These grooves facilitate the installation of the water spray ring 4, making it easy to fix and use. The protective shell 2 has a fixing foot 22 at its rear center, with multiple evenly spaced fixing holes 23 along its edges. The fixing foot 22 and the fixing holes 23 work together to secure the protective shell 2 in a designated position using bolts. The protective shell 2 has a sealing ring 24 at its rear center, with a wire hole 241 in its center. The sealing ring 24 and the wire hole 241 work together to seal the transmission line 3 between the protective shell 2 and the protective shell 2. The protective shell 2 has a water supply pipe 25 inside, with its rear end protruding from the protective shell 2. This structure allows the water supply pipe 25 to be connected to the tunnel boring machine's water supply system, facilitating the supply of water to the water spray ring 4. Furthermore, a solenoid valve 251 is installed at one end of the water supply pipe 25 protruding from the protective housing 2. The solenoid valve 251 has a first connecting line 252, and a first connecting plug 253 is installed at the end of the first connecting line 252. The first connecting plug 253 is electrically connected to the detector 8. The solenoid valve 251 facilitates the opening and closing of the water supply pipe 25, making its use convenient. A mounting groove 26 is provided on the front face of the protective housing 2, which facilitates the installation of the pressure sensor 1. A socket 27 is provided in the middle of the mounting groove 26, into which the plug 13 is inserted for stable installation and fixation of the pressure sensor 1. Multiple connecting grooves 261 are evenly distributed along the edge of the mounting groove 26, which facilitate the mating of the pressure sensor 1, ensuring its stable installation inside the mounting groove 26. The mounting groove 26 has a ring of pressure groove 28 around the outside of the insertion hole 27; the sealing gasket 12 is pressed on the pressure groove 28 to achieve a seal between the pressure sensor 1 and the protective housing 2; the protective housing 2 has a water outlet pipe 29 on its side, and the end of the water outlet pipe 29 has a connecting cap 291, and the water outlet pipe 29 is connected to the water supply pipe 25. The cooperation between the water outlet pipe 29 and the connecting cap 291 is to facilitate connection with the water spray ring 4.

[0053] like Figure 5 As shown, one end of the transmission line 3 is provided with a first female connector 31, which is connected to the first male connector 14; the other end of the transmission line 3 is provided with a second female connector 32, which is connected to the detector 8, so that the transmission line 3 can be stably connected to the detector 8; the bottom end of the second female connector 32 is rotatably connected with an adapter cap 33.

[0054] like Figure 6As shown, multiple nozzles 41 are evenly arranged on the inner side of the water spray ring 4, with the nozzles 41 facing the pressure sensor 1. This structure facilitates the spraying of high-pressure water jets from the nozzles 41 to flush and clean the detection surface of the pressure sensor 1. Multiple fixing plates 45 are provided on the side of the water spray pipe, which are engaged inside the fixing groove 21. Multiple countersunk holes 46 are provided on the fixing plates 45, and the water spray pipe is fixed to the protective housing 2 by bolts passing through the countersunk holes 46, ensuring stable installation of the water spray pipe on the protective housing 2. One of the fixing plates 45 is provided with a mounting platform 42, which facilitates the installation of the drive cylinder 5. A through hole 43 is provided in the center of the mounting platform 42, allowing the output end of the drive cylinder 5 to pass through the fixing plate 45. The mounting platform 42 is symmetrically provided with slots 44 on both sides, facilitating connection between the drive cylinder 5 and the mounting platform 42. A connecting pipe 47 is provided on the side of the water spray ring 4, which is connected to the water storage pipe.

[0055] like Figure 7 As shown, the bottom of both sides of the drive cylinder 5 is provided with a retaining plate 51, and the retaining plate 51 has multiple bolt holes 52. The retaining plate 51 is engaged with the retaining groove 44. The drive cylinder 5 is fixed to the mounting platform 42 by bolts passing through the retaining groove 44. This structure ensures that the drive cylinder 5 is stably installed on the mounting platform 42. The output end of the drive cylinder 5 is provided with a telescopic rod 53, which facilitates the up and down movement of the scraper 6. The bottom end of the telescopic rod 53 is provided with a stud 54, and a pressure cap 55 is threaded onto the stud 54. The stud 54 and the pressure cap 55 facilitate the connection between the telescopic rod 53 and the scraper 6.

[0056] like Figure 8 As shown, the scraper 6 has a mounting plate 61 on its top, and a connecting plate 62 on its top. The connecting plate 62 and the mounting plate 61 are vertically connected. The fit between the mounting plate 61 and the connecting plate 62 facilitates the connection between the scraper 6 and the telescopic rod 53. The connecting plate 62 has a connecting hole 63 in its middle, which is fitted onto the stud 54. The pressure cap 55 presses against the bottom surface of the connecting plate 62. This structure ensures that the scraper 6 is stably installed at the bottom end of the telescopic rod 53.

[0057] like Figure 10 As shown, the top of the detector 8 is equipped with a second male connector 81, which facilitates connection between the detector 8 and the transmission line 3. A display screen 82 is located on the top front of the detector 8, which displays the test data. Below the display screen 82 on the front of the detector 8 is a control panel 83, which facilitates operation of the entire testing device. A support foot 84 is located in the center of the bottom surface of the detector 8, and a base plate 85 is located on the bottom surface of the support foot 84. Bottom holes 86 are located at the corners of the base plate 85. The support foot 84, in conjunction with the base plate 85, facilitates the installation and fixation of the detector 8, ensuring its stable positioning.

[0058] like Figure 1 and Figure 9As shown, it also includes a high-pressure water pump 7. The high-pressure water pump 7 has two external connecting pipes 71 at its ends, and external caps 72 at the ends of the external connecting pipes 71. The two external connecting pipes 71 are the inlet and outlet ends of the high-pressure water pump 7. The outlet end of the high-pressure water pump 7, including the external connecting pipe 71 and the external cap 72, is connected to the rear end of the water supply pipe 25, facilitating the high-pressure water pump 7 to draw water into the water supply pipe 25. The suction end of the high-pressure water pump 7 is connected to the shield machine's water supply system. A second connecting line 73 is provided on the side of the high-pressure water pump 7, and a second connecting plug 74 is provided at the end of the second connecting line 73. The second connecting line 73 and the second connecting plug 74 facilitate the connection of the high-pressure water pump 7 to the detector 8.

[0059] like Figure 11 As shown, the detector 8 is electrically connected to the high-pressure water pump 7. The detector 8 integrates an MCU control module, which is connected to a signal acquisition module, a signal processing module, a storage module, a power supply module, a communication module, a solenoid valve 251 control module, and a water pump control module. The MCU control module processes various data from the entire detection device. The signal acquisition module is used to collect pressure data in the soil chamber in conjunction with the pressure sensor 1. The signal processing module is used to process the collected pressure signals. The storage module is used to store the detection data. The communication module is used to transmit the processed data to the tunnel boring machine control system. The solenoid control module is used to control the operation of the solenoid valve 251, and the water pump control module is used to control the operation of the high-pressure water pump 7.

[0060] Working principle: In use, the pressure sensor 1 first detects the soil pressure inside the tunnel boring machine's soil chamber in real time. The pressure sensor 1 is stably assembled with the flange 11 at the rear end of the side and the mounting groove 26 at the front end of the protective shell 2. The sealing gasket 12 at its rear end is pressed against the pressure groove 28 of the mounting groove 26 of the protective shell 2. At the same time, the rear end of the protective shell 2 is sealed with the transmission line 3 by the sealing ring 24, which together achieves the sealing protection of the sensor wiring position and the interface of the transmission line 3. The first male connector 14 at the rear end of the pressure sensor 1 is connected to the first female connector 31 at one end of the transmission line 3. The second female connector 32 at the other end of the transmission line 3 is connected to the second male connector 81 at the top of the detector 8, thereby transmitting the pressure signal collected by the sensor to the detector 8. The detector 8 is based on the integrated MCU control module. It first collects the soil pressure data of the pressure sensor 1 through the signal acquisition module, and then the signal processing module processes the data. Part of the processed data is displayed on the display screen 82 on the front of the detector 8, and part is stored in the storage module. It can also be transmitted to the tunnel boring machine control system through the communication module. Personnel can operate the entire device through the control panel 83 of the detector 8. The detector 8 is stably installed on the base plate 85 through the bottom support feet 84. When soil adheres to the detection surface of pressure sensor 1, affecting the detection, the MCU control module opens the solenoid valve 251 on the water supply pipe 25 via the solenoid valve 251 control module. At the same time, the high-pressure water pump 7 is started via the water pump control module. After the high-pressure water pump 7 draws water from the shield machine's water supply system, it is delivered to the water supply pipe 25 inside the protective shell 2 through the water outlet external pipe 71. The water supply pipe 25 then delivers the high-pressure water to the water spray ring 4 at the front end of the protective shell 2 through the water outlet pipe 29. The nozzle 41 on the inner side of the water spray ring 4 sprays a high-pressure water jet at the sensor detection surface to wash away the soil. If the soil is still not cleaned, the MCU control module further controls the operation of the drive cylinder 5 on the water spray ring 4 mounting platform 42. The extension rod 53 of the drive cylinder 5 drives the scraper 6 to fit against the detection surface of pressure sensor 1 to scrape away the residual soil, ensuring that pressure sensor 1 can continuously and stably perform soil pressure detection.

[0061] In summary, compared with the prior art, this application cleans the surface of the pressure sensor 1 by setting a water spray ring 4 at the end of the pressure sensor 1 and using high-pressure water jet to flush the pressure sensor 1, thus avoiding the accumulation of dirt on the surface of the pressure sensor 1 and affecting the detection accuracy. At the same time, a drive cylinder 5 is installed on the water spray ring 4, which can drive the scraper 6 to scrape the detection surface of the pressure sensor 1 back and forth, thereby cleaning the dirt on the detection surface of the pressure sensor 1 and effectively ensuring the accuracy of the pressure sensor 1 detection inside the tunnel boring machine's soil chamber.

[0062] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A shield tunneling machine soil chamber pressure sensor (1) detection device, characterized in that, Including pressure sensor (1), the pressure sensor (1) is used for the real-time detection of the earth pressure inside the earth chamber of shield machine; Protective shell (2), the protective shell (2) is installed in the rear end of pressure sensor (1), and the protective shell (2) and pressure sensor (1) are sealed between them; Transmission line (3), one end of the transmission line (3) is connected with the rear end of pressure sensor (1), the other end of the transmission line (3) is out of the rear end of protective shell (2), and the transmission line (3) and the rear end of protective shell (2) are sealed between them; Water spraying ring (4), the water spraying ring (4) is arranged with the front end of protective shell (2), and the water spraying end of the water spraying ring (4) is aligned with the detection surface of pressure sensor (1);The water spraying ring (4) is connected with the pipeline inside the protective shell (2); Drive cylinder (5), the drive cylinder (5) is arranged with the water spraying ring (4), and the output end of the drive cylinder (5) is connected with the scraper (6), the scraper (6) is attached to the detection surface of pressure sensor (1), and the drive cylinder (5) drives the slide plate to clean the detection surface of pressure sensor (1); Detector (8), the detector (8) is electrically connected with pressure sensor (1) through transmission line (3).

2. The earth pressure sensor (1) detection device of a shield tunneling machine according to claim 1, characterized in that, The rear end of the side surface of the pressure sensor (1) is provided with a flange plate (11), a plurality of flange holes (15) are uniformly arranged on the flange plate (11), a plug (13) is arranged in the middle of the rear end of the pressure sensor, a first male connector (14) is arranged in the middle of the plug (13), and a sealing gasket (12) is arranged on the outer side of the plug (13) along the rear end surface of the pressure sensor (1).

3. The earth pressure sensor (1) detection device of a shield tunneling machine according to claim 2, characterized in that, The protective shell (2) side front end is uniformly provided with a plurality of fixed grooves (21), the rear end of the protective shell (2) is provided with a fixed foot (22), and the edge of the fixed foot (22) is uniformly provided with a plurality of fixed holes (23); the rear end of the protective shell (2) is provided with a sealing ring (24), and the middle of the sealing ring (24) is provided with a threading hole (241); the inside of the protective shell (2) is provided with a water supply pipe (25), the rear end of the water supply pipe (25) protrudes out of the protective shell (2), and one end of the water supply pipe (25) protruding out of the protective shell (2) is provided with an electromagnetic valve (251), the electromagnetic valve (251) is provided with a first communication line (252), and the end of the first communication line (252) is provided with a first communication plug (253), the first communication plug (253) is electrically connected with the detector (8); the front end surface of the protective shell (2) is provided with a mounting groove (26), the middle of the mounting groove (26) is provided with a jack (27), and the plug (13) is inserted into the inside of the jack (27); and the edge of the mounting groove (26) is uniformly provided with a plurality of connecting grooves (261), and the mounting groove (26) is provided with a ring of pressing grooves (28) along the outside of the jack (27); the sealing gasket (12) is pressed on the pressing groove (28), so as to realize sealing between the pressure sensor (1) and the protective shell (2); the side of the protective shell (2) is provided with a water outlet pipe (29), the end of the water outlet pipe (29) is provided with a connecting cap (291), and the water outlet pipe (29) is connected with the water supply pipe (25).

4. The earth pressure sensor (1) detection device of a shield tunneling machine according to claim 2, characterized in that, One end of the transmission line (3) is provided with a first connecting female head (31), and the first connecting female head (31) is connected with the first connecting male head (14); the other end of the transmission line (3) is provided with a second connecting female head (32), and the bottom end of the second connecting female head (32) is rotatably connected with an adapter cap (33).

5. The earth pressure sensor (1) detection device of a shield tunneling machine according to claim 3, characterized in that, The inside of the water spraying ring (4) is uniformly provided with a plurality of spray heads (41), and the spray heads (41) are arranged towards the pressure sensor (1); the side of the water spraying pipe is provided with a plurality of fixed plates (45), the fixed plates (45) are clamped in the fixed grooves (21), a plurality of counterbores (46) are arranged on the fixed plates (45), the water spraying pipe is fixed on the protective shell (2) by penetrating the counterbores (46) through bolts, and one of the fixed plates (45) is provided with a mounting table (42), the middle of the mounting table (42) is provided with a through hole (43), and the mounting table (42) is symmetrically provided with clamping grooves (44) on both sides; the side of the water spraying ring (4) is provided with a connecting pipe (47), and the connecting pipe (47) is connected with the water storage pipe.

6. The earth pressure sensor (1) detection device of a shield tunneling machine according to claim 5, characterized in that, The bottom of the driving cylinder (5) is provided with a clamping plate (51), a plurality of bolt holes (52) are arranged on the clamping plate (51), the clamping plate (51) is clamped on the clamping groove (44), and the driving cylinder (5) is fixed on the mounting table (42) by penetrating the clamping groove (44) through bolts; the output end of the driving cylinder (5) is provided with a telescopic rod (53), the bottom end of the telescopic rod (53) is provided with a stud (54), and the stud (54) is threadedly connected with a pressing cap (55).

7. The earth pressure sensor (1) detection device of a shield tunneling machine according to claim 6, characterized in that, The scraper (6) top is equipped with mounting plate (61), the mounting plate (61) top is equipped with sleeve joint plate (62), the sleeve joint plate (62) and mounting plate (61) vertical connection, and the sleeve joint plate (62) middle part is equipped with sleeve joint hole (63), the sleeve joint hole (63) is set on the stud (54), the pressure cap (55) is pressed in the sleeve joint plate (62) bottom.

8. The earth pressure sensor (1) detection device of a shield tunneling machine according to claim 1, characterized in that, The detector (8) top is equipped with the second connection male head (81), and the detector (8) front top is equipped with the display screen (82), the detector (8) front is equipped with the control panel (83) along the display screen (82) below;The detector (8) bottom surface middle part is equipped with support leg (84), the support leg (84) bottom is equipped with bottom plate (85), the bottom plate (85) corner is equipped with bottom hole (86).

9. The earth pressure sensor (1) detection device of a shield tunneling machine according to claim 3, characterized in that, It also includes high pressure water pump (7), the high pressure water pump (7) end is equipped with two external connection pipe (71), the external connection pipe (71) end is equipped with external connection cap (72), two the external connection pipe (71) is divided into the water inlet end and the water outlet end of high pressure water pump (7), the external connection pipe (71) and external connection cap (72) of high pressure water pump (7) water outlet end are connected with the rear end of water supply pipe (25), the high pressure water pump (7) side is equipped with second intercommunication line (73), the second intercommunication line (73) end is equipped with second intercommunication plug (74).

10. The earth pressure sensor (1) detection device of a shield tunneling machine according to claim 9, characterized in that, The detector (8) is electrically connected with high pressure water pump (7), the detector (8) is integrated with MCU control module inside, the MCU control module is connected with signal acquisition module, signal processing module, storage module, power module, communication module, electromagnetic valve (251) control module and water pump control module;The MCU control module processes various data of the whole detection device, the signal acquisition module is used for collecting pressure data in the soil bin in cooperation with pressure sensor (1), the signal processing module is used for processing the collected pressure signal;The storage module is used for storing detection data, the communication module is used for transmitting the processed data to the shield machine control system;The electromagnetic control module is used for controlling the operation of electromagnetic valve (251), and the water pump control module is used for controlling the operation of high pressure water pump (7).

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