CN216116487U - Monitoring device for monitoring shield tail pressure balance of shield machine - Google Patents

Abstract

The utility model relates to the technical field of detection in a shield construction process, and discloses a monitoring device for monitoring pressure balance of a shield tail of a shield machine, wherein a plurality of grouting holes are uniformly distributed in the circumferential direction of the shield tail; the second soil pressure gauge is arranged between two adjacent grouting holes and used for monitoring the change of the formation pressure in the propelling process; the first soil pressure gauge and the second soil pressure gauge are in communication connection with a control system of the shield tunneling machine, and the control system is used for controlling the grouting pressure of the shield tunneling machine. The grouting pressure value and the stratum pressure value measured in real time are transmitted to a control system of the shield machine, and the control system controls the grouting pressure so as to achieve pressure balance and enable the shield machine to be in a proper working state.

Description

Monitoring device for monitoring shield tail pressure balance of shield machine

Technical Field

The utility model relates to the technical field of detection of shield construction processes, in particular to a monitoring device for monitoring shield tail pressure balance of a shield tunneling machine.

Background

Synchronous grouting of the shield tail is an important link in the shield construction process, and the aim of controlling stratum deformation is achieved by filling gaps between duct pieces and an excavation boundary. When the grouting pressure set on the shield PLC is determined according to the water and soil pressure of the overlying stratum, if the set pressure is too low, the stratum pressure cannot be overcome, and if the set pressure is too high, the stratum can be split or a shield tail brush can be punctured. Therefore, the grouting pressure is determined according to the formation pressure. In the shield construction process, slurry is mainly injected into a shield tail grouting opening through a grouting pump, the shield tail grouting opening is connected with a grouting pool through a pipeline, partial air filling exists in a grouting pipe, so that the pressure of a grouting pump cannot reflect the slurry pressure of the shield tail grouting opening, and the grouting pressure is detected in real time at the shield tail grouting opening.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a monitoring device for monitoring the shield tail pressure balance of a shield tunneling machine, and aims to solve the problem that the grouting pressure of a shield tail is difficult to detect in real time.

In order to achieve the purpose, the utility model provides the following technical scheme: the monitoring device is used for monitoring the pressure balance of the shield tail of the shield tunneling machine, a plurality of grouting holes are uniformly distributed in the circumferential direction of the shield tail, the monitoring device comprises a first soil pressure gauge and a second soil pressure gauge, and the first soil pressure gauge is arranged at a position close to the grouting holes and used for monitoring the grouting pressure of synchronous grouting in the propelling process; the second soil pressure gauge is arranged between two adjacent grouting holes and used for monitoring the change of the formation pressure in the propelling process; the first soil pressure gauge and the second soil pressure gauge are in communication connection with a control system of the shield tunneling machine, and the control system is used for controlling the grouting pressure of the shield tunneling machine.

Further, the control system compares the formation pressure measured by the second soil pressure gauge with the grouting pressure measured by the first soil pressure gauge, and adjusts the grouting pressure until the pressures are balanced.

Furthermore, first soil pressure gauge includes the barrel and locates the cone of barrel one end, the inside of barrel is equipped with the baffle, the baffle will the inside of barrel separates into first cavity and second cavity, the second cavity is close to the cone, the baffle orientation one side of second cavity is equipped with pressure measurement spare, the through-hole has been seted up on the lateral wall of second cavity.

Further, pressure measurement spare including gomphosis fixed connection in fixing base on the baffle, the fixing base includes backplate and tablet, the tablet with be equipped with excitation solenoid between the backplate.

Furthermore, be in with the baffle is relative be equipped with the auxiliary measurement subassembly on the inner wall of second cavity, the auxiliary measurement subassembly include fixed connection in pressure sensor on the inner wall of second cavity, pressure sensor corresponds the setting of pressure measurement spare, pressure sensor's top is equipped with the removal touch panel, remove the touch panel activity block in on the inner wall of second cavity, remove the touch panel with be equipped with coupling spring between the pressure sensor.

Further, the upper end of barrel is equipped with the screw sleeve, threaded sleeve's inner chamber has cup jointed adjusting screw, adjusting screw extends to the inside of first cavity, adjusting screw's end-to-end connection has spacing subassembly.

Further, spacing subassembly includes the moving part, the moving part connect in adjusting screw's end, the below swing joint of moving part has the adjusting link, the lower extreme swing joint of adjusting link has the fixed block, the below of fixed block is equipped with spacing slider, be equipped with the guide bar between the both sides inner wall of first cavity, spacing slider activity cup joint in the guide bar.

Furthermore, the side of fixed block is equipped with many gag lever posts, the end of gag lever post runs through the lateral wall of barrel.

Furthermore, be equipped with the protective tube on the outer wall of barrel, install signal transmission line in the protective tube, signal transmission line respectively with pressure measurement spare with the auxiliary measuring subassembly electricity is connected.

Furthermore, the protective pipe with the barrel constitutes integral type structure, the protective pipe includes the center tube, the outer wall of center tube has cup jointed explosion-proof glass pipe.

Compared with the prior art, the monitoring device for monitoring the shield tail pressure balance of the shield tunneling machine provided by the utility model has the advantages that the grouting pressure of synchronous grouting in the propulsion process is monitored in real time through the first soil pressure gauge arranged close to the grouting hole at the shield tail, the change of the stratum pressure in the propulsion process is monitored in real time through the second soil pressure gauge arranged between the adjacent grouting holes, the real-time measured grouting pressure value and the real-time measured stratum pressure value are transmitted to the control system of the shield tunneling machine, and the grouting pressure is controlled by the control system so as to achieve the pressure balance and enable the shield tunneling machine to be in a proper working state.

Drawings

FIG. 1 is a schematic overall structure diagram of a monitoring device for monitoring the shield tail pressure balance of a shield tunneling machine according to the present invention;

FIG. 2 is a schematic diagram of the overall installation structure of the monitoring device for monitoring the shield tail pressure balance of the shield tunneling machine according to the utility model;

FIG. 3 is a cross-sectional view of a cylinder of the monitoring device for monitoring the shield tail pressure balance of the shield tunneling machine of the utility model;

fig. 4 is an enlarged schematic structural diagram of a part a in fig. 3 of the monitoring device for monitoring the shield tail pressure balance of the shield tunneling machine according to the present invention;

FIG. 5 is a schematic structural diagram of a bending part of the monitoring device for monitoring the shield tail pressure balance of the shield tunneling machine;

FIG. 6 is a schematic structural view of a bending limiting rod of a bending part of the monitoring device for monitoring the shield tail pressure balance of the shield tunneling machine;

FIG. 7 is a schematic structural diagram of a pressure measuring part of the monitoring device for monitoring the shield tail pressure balance of the shield tunneling machine;

fig. 8 is a cross-sectional view of a protective pipe of the monitoring device for monitoring the shield tail pressure balance of the shield tunneling machine.

In the figure: 1. a barrel; 2. a conical head; 3. limiting spiral teeth; 4. a partition plate; 5. a first chamber; 6. a second chamber; 7. a threaded sleeve; 8. adjusting the screw rod; 9. a limiting component; 91. a movable member; 92. adjusting the connecting rod; 93. a fixed block; 94. a limit slider 94, a limit slider; 95. a limiting rod; 10. adjusting the handle; 11. a pressure measurement member; 111. a fixed seat; 112. a back plate; 113. an induction plate; 12. a through hole; 13. an auxiliary measurement assembly; 131. a pressure sensor; 132. a connecting spring; 133. moving the touch panel; 134. a top pressure rod; 14. a protective tube; 141. a central tube; 142. an explosion-proof glass tube I; 143. a reinforcing block; 144. an explosion-proof glass tube II; 145. a vacuum chamber; 146. a buffer ball; 147. a protective outer sleeve; 148. a heat-insulating board layer; 15. a signal transmission cable; 16. a bending member; 161. a mounting seat; 162. an arc-shaped surface; 163. bending the sleeve; 17. a guide rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The monitoring device is used for monitoring the pressure balance of the shield tail of the shield tunneling machine, a plurality of grouting holes are uniformly distributed in the circumferential direction of the shield tail, the monitoring device comprises a first soil pressure gauge and a second soil pressure gauge, and the first soil pressure gauge is arranged at a position close to the grouting holes and used for monitoring the grouting pressure of synchronous grouting in the propelling process; the second soil pressure gauge is arranged between two adjacent grouting holes and used for monitoring the change of the formation pressure in the propelling process; the first soil pressure gauge and the second soil pressure gauge are in communication connection with a control system of the shield tunneling machine, and the control system is used for controlling the grouting pressure of the shield tunneling machine.

The monitoring device for monitoring the shield tail pressure balance of the shield tunneling machine provided by the utility model monitors the grouting pressure of synchronous grouting in the propulsion process in real time through the first soil pressure gauge arranged close to the shield tail grouting hole, monitors the change of stratum pressure in the propulsion process in real time through the second soil pressure gauge arranged between the adjacent grouting holes, transmits the real-time measured grouting pressure value and the stratum pressure value to the control system of the shield tunneling machine, and controls the grouting pressure by the control system so as to achieve the pressure balance and enable the shield tunneling machine to be in a proper working state.

Specifically, in the shield advancing process, synchronous grouting is continuously carried out through a grouting port, and two first soil pressure gauges are distributed on two sides of each grouting hole and used for monitoring the grouting pressure of the synchronous grouting in the advancing process;

respectively arranging a second soil pressure gauge in the upper, lower, left and right directions of the shield tail for monitoring the change of the formation pressure and the change of the formation temperature in the propelling process;

all the first soil pressure meters and the second soil pressure meters are connected with a PLC system of the shield machine, and meanwhile, the measured formation pressure is compared with the grouting pressure and correspondingly adjusted until the pressure is balanced.

Referring to fig. 1-3, a monitoring device for monitoring the pressure balance of the shield tail of a shield tunneling machine comprises a barrel 1 and a conical head 2 arranged at one end of the barrel 1, a limiting spiral tooth 3 is arranged on the outer wall of the conical head 2, a partition plate 4 is arranged inside the barrel 1, the partition plate 4 divides the interior of the barrel into a first chamber 5 and a second chamber 6, a threaded sleeve 7 is arranged on the outer wall of the first chamber 5 at one end of the barrel 1 far away from the conical head 2, an adjusting screw 8 is sleeved in the inner cavity of the threaded sleeve 7, the adjusting screw 8 extends into the first chamber 5, the tail end of the adjusting screw is connected with a limiting assembly 9, an adjusting handle 10 is fixedly connected to the tail end of the adjusting screw 8 outside the first chamber 5, a pressure measuring piece 11 is arranged on the outer wall of the partition plate 4 inside the second chamber 6, through holes 12 are respectively arranged on the outer walls at two sides of the barrel 1 corresponding to the second chamber 6, the through holes 12 are symmetrically arranged with respect to the pressure measuring piece 11, and fixedly connected with auxiliary measuring component 13 on the relative second chamber 6 inner wall of pressure measurement spare 11, be provided with protective tube 14 on the second chamber 6 outer wall of auxiliary measuring component 13 one side, install signal transmission cable 15 in the protective tube 14, signal transmission cable 15 electric connection pressure measurement spare 11 and auxiliary measuring component 13.

Referring to fig. 3 and 4, the limiting component 9 includes a movable member 91 movably connected to the end of the adjusting screw 8 in the first chamber 5, the outer walls of two sides of the movable member 91 are movably connected to one end of the adjusting link 92, the other end of the adjusting link 92 is movably connected to the outer wall of one side of the fixing block 93, a limiting slider 94 is disposed on the outer wall of one side of the fixing block 93 away from the adjusting link 92, the limiting slider 94 is movably sleeved on the outer wall of the guide rod 17 disposed between the inner walls of two sides of the first chamber 5, the limiting slider 94 is attached to the inner wall of the first chamber 5, and a limiting rod 95 is uniformly disposed on the outer wall of one side of the fixing block 93 opposite to the other side, and the end of the limiting rod 95 penetrates through the side walls of the cylinder 1 at two sides of the first chamber 5.

Referring to fig. 1, 3, 5 and 6, the outer walls of the two sides of the barrel 1 corresponding to the limiting rod 95 are respectively provided with a bending part 16, the bending part 16 includes a mounting seat 161 fixedly connected to the outer walls of the two sides of the barrel 1, the two ends of the mounting seat 161 are respectively arranged in a big-small shape, the small end is fixedly connected to the outer wall of the barrel 1, the periphery of the mounting seat 161 is respectively provided with an arc surface 162, the arc surfaces 162 are all arranged in a concave shape, the outer wall of the arc surface 162 is respectively and fixedly connected with a bending sleeve 163, the bending sleeves 163 are respectively arranged corresponding to the limiting rod 95, the bending sleeve 163 is used for bending the limiting rod 95 when the limiting rod 95 slides inside, the port of the bending sleeve 163 is aligned with the through hole of the limiting rod 95 penetrating through the side wall of the barrel 1, the tail end of the limiting rod 95 is movably sleeved at the inlet of the bending sleeve 163 when the limiting slider 94 is close to each other, and the length of the limiting rod 95 is more than half and three times of the length of the bending sleeve 163, utilize conical head 2 to connect fixedly after running through the injected hole of shield tail with the device, and aim at the injected hole with through-hole 12 on the barrel 1, rotatory regulation handle 10 drive adjusting screw 8 cooperation regulation connecting rod 92 promotes the separation of fixed block 93 afterwards, fixed block 93 promotes gag lever post 95 and extrudees crooked in getting into crooked sleeve 163, the crooked gag lever post 95 that extends out from crooked sleeve 163 end can extend to and carry out reverse spacing fixedly in the mounting hole that mount pad 161 corresponds, the installation stability of increase device.

Referring to fig. 3 and 7, the pressure measuring unit 11 includes a fixing base 111 fixedly connected to the outer wall of the partition board 4 in the second chamber 6, the fixing base 111 is fixedly connected to the outer wall of the partition board 4 by being embedded, a back plate 112 is disposed on the outer wall of the fixing base 111, an induction plate 113 is disposed on the outer wall of the back plate 112 away from the fixing base 111, an excitation electromagnetic coil is disposed between the induction plate 113 and the back plate 112, and the induction plate 113 is electrically connected to one end of the signal transmission cable 15 through an electrode.

The auxiliary measuring assembly 13 includes a pressure sensor 131 fixedly connected to the inner wall of the second chamber 6, the pressure sensor 131 is disposed corresponding to the pressure measuring part 11, the outer walls of the two sides of the pressure sensor 131 are respectively provided with a connecting spring 132, the ends of the connecting springs 132 are respectively fixedly connected to the outer walls of the two sides of the movable touch plate 133, the movable touch plate 133 is movably clamped between the inner walls of the second chamber 6, the outer wall of the movable touch plate 133 is provided with a top pressure rod 134 corresponding to the pressure sensor 131, the pressure sensor 131 is electrically connected to the signal transmission cable 15 through an electrode, grouting slurry flows into the second chamber 6 from the through hole 12 to respectively push the sensing plate 113 and the movable touch plate 133, the sensing plate 113 is pushed to directly detect the soil layer pressure during grouting, the movable touch plate 133 is pushed to drive the top pressure rod 134 to squeeze the pressure sensor 131, and the pressure sensor 131 detects the grouting pressure for the second time, and the pressure of the grouting soil layer at the same point is reflected by comparing the detection results of two times, so that the detection accuracy is improved.

Referring to fig. 1 and 8, the protective tube 14 and the barrel 1 form an integrated structure, the protective tube 14 includes a central tube 141, the outer wall of the central tube 141 is sleeved with the first explosion-proof glass tube 142, the outer wall of the first explosion-proof glass tube 142 is respectively provided with reinforcing blocks 143 at uniform intervals, the ends of the reinforcing blocks 143 are respectively fixedly connected to the inner wall of the second explosion-proof glass tube 144, the reinforcing blocks 143 are arranged in a cross-shaped symmetrical distribution, a vacuum cavity 145 is formed between the first explosion-proof glass tube 142 and the side wall of the second explosion-proof glass tube 144 between the reinforcing blocks 143, the vacuum cavity 145 is vacuumized, the outer wall of the second explosion-proof glass tube 144 is uniformly provided with buffer balls 146, the outer wall of the buffer balls 146 is wrapped with a protective outer sleeve 147, and the protective sleeve 147 is a member made of stainless steel material; the buffer balls 146 are of a hemispherical structure, the interior of the buffer balls is hollow, and ceramic particles are filled in external gaps among the buffer balls 146; the central tube 141 is a double-layer overlapped honeycomb structure, a heat preservation plate layer 148 is fixedly connected to the inner wall of the central tube 141, the heat preservation plate layer 148 is a component made of polyurethane materials, the heat preservation plate layer 148 is fixedly connected to the inner wall of the central tube 141 through bonding and pressing, the stainless steel protective outer sleeve 147 extrudes the buffer ball 146 after being subjected to impact deformation, meanwhile, the ceramic particles provide buffer resistance to the extrusion deformation position and prevent the protective outer sleeve 147 from being seriously deformed, then, the double-layer explosion-proof glass tube and the internal vacuum cavity 145 provide enough rigidity strength to completely offset impact damage, the internal signal transmission cable 15 is effectively protected, and damage and influence during grouting are avoided.

The working principle is as follows: the device penetrates through a grouting hole of a shield tail and is connected and fixed by using a conical head 2, a through hole 12 in a cylinder body 1 is aligned with the grouting hole, then an adjusting handle 10 is rotated to drive an adjusting screw 8 to be matched with an adjusting connecting rod 92 to push a fixing block 93 to separate, the fixing block 93 pushes a limiting rod 95 to enter a bending sleeve 163 to be extruded and bent, the bending limiting rod 95 extending out of the tail end of the bending sleeve 163 can extend into a mounting hole corresponding to a mounting seat 161 to be limited and fixed reversely, the mounting stability of the device is improved, a stainless steel protective outer sleeve 147 extrudes a buffer ball 146 after being deformed by impact, meanwhile, ceramic particles provide buffer resistance for the extrusion deformation position to prevent the protective outer sleeve 147 from being deformed seriously, then, a double-layer anti-explosion glass tube and an internal vacuum cavity 145 provide enough rigidity strength to completely offset impact damage, and effectively protect a signal transmission cable 15 inside the double-layer anti-explosion glass tube and the internal vacuum cavity 145, the use of the mortar is prevented from being damaged during grouting.

The utility model has the following beneficial effects:

the utility model provides a monitoring device for monitoring the shield tail pressure balance of a shield tunneling machine, wherein a threaded sleeve is arranged on the outer wall of a first cavity at one end of a cylinder body far away from a conical head, an inner cavity of the threaded sleeve is sleeved with an adjusting screw rod, the adjusting screw rod extends into the first cavity, the tail end of the adjusting screw rod is respectively movably connected with an adjusting connecting rod through a movable part, the adjusting connecting rod is movably sleeved with a guide rod between the inner walls at two sides of the first cavity through a limiting slide block after being movably connected with a fixed block, the outer walls at the back of the fixed blocks are respectively and uniformly provided with a limiting rod, the tail end of the limiting rod penetrates through the side wall of the cylinder body at two sides of the first cavity, the outer wall of the limiting rod is provided with a mounting seat of a bending part, the arc-shaped surfaces at the periphery of the mounting seat are respectively provided with a bending sleeve, the device penetrates through a grouting hole at the tail and is fixedly connected by using the conical head, a through hole on the cylinder body is aligned with the grouting hole, then an adjusting handle is rotated to drive the adjusting screw rod to cooperate with the adjusting connecting rod to push the fixed blocks to separate, the fixed block promotes the gag lever post and extrudes in getting into the crooked sleeve crooked, and the crooked gag lever post that extends out from crooked sleeve end can extend to the mounting hole that the mount pad corresponds in carry out reverse spacing fixedly, increases the installation stability of device.

2. The utility model provides a monitoring device for monitoring the pressure balance of the shield tail of a shield tunneling machine, wherein a fixed seat fixedly connected with the outer wall of a partition plate in a second chamber is embedded, a back plate and a sensing plate are sequentially arranged on the outer wall of the fixed seat, a pressure sensor is arranged on the inner wall of the second chamber opposite to the sensing plate, connecting springs are respectively arranged on the outer walls of two sides of the pressure sensor, the tail ends of the connecting springs are respectively and fixedly connected with the outer walls of two sides of a movable touch plate, the movable touch plate is movably clamped between the inner walls of the second chamber, a top pressure rod is arranged on the outer wall of the movable touch plate corresponding to the pressure sensor, the pressure sensor is electrically connected with a transmission cable through an electrode, grouting slurry flows into the second chamber from a through hole and respectively pushes the sensing plate and the movable touch plate, the sensing plate is pushed to directly detect the soil layer pressure during grouting, and the movable touch plate is pushed to drive the top pressure rod to squeeze the pressure sensor, the pressure sensor detects the grouting pressure for the second time, the grouting soil layer pressure at the same point is reflected by the comparison of two detection results, and the detection accuracy is improved.

3. The utility model provides a monitoring device for monitoring the shield tail pressure balance of a shield machine, wherein an explosion-proof glass tube I is sleeved on the outer wall of a central tube of a protective tube, reinforcing blocks are arranged on the outer wall of the explosion-proof glass tube I and connected with an explosion-proof glass tube II, reinforcing blocks are symmetrically distributed in a cross shape, a vacuum cavity is formed between the explosion-proof glass tube I among the reinforcing blocks and two side walls of the explosion-proof glass tube, the vacuum cavity is vacuumized, buffer balls are uniformly arranged on the outer wall of the explosion-proof glass tube II, protective outer sleeves are wrapped on the outer walls of the buffer balls, the protective outer sleeves are members made of stainless steel materials, the buffer balls are of hemispherical structures, the interiors of the buffer balls are hollow, ceramic particles are filled in external gaps among the buffer balls, the stainless steel outer sleeves extrude the buffer balls after the protection of the buffer balls are deformed by impact, meanwhile, the ceramic particles provide buffer resistance to extrusion deformation positions and prevent the protective outer sleeves from serious deformation, then the double-layer explosion-proof glass tube and the inner vacuum cavity provide enough rigidity strength to completely offset impact damage, effectively protect the signal transmission cable inside the double-layer explosion-proof glass tube and the inner vacuum cavity, and avoid the damage to the double-layer explosion-proof glass tube and the inner vacuum cavity during grouting.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The device is characterized by comprising a first soil pressure gauge and a second soil pressure gauge, wherein the first soil pressure gauge is arranged at a position close to the grouting holes and used for monitoring the grouting pressure of synchronous grouting in the propulsion process; the second soil pressure gauge is arranged between two adjacent grouting holes and used for monitoring the change of the formation pressure in the propelling process; the first soil pressure gauge and the second soil pressure gauge are in communication connection with a control system of the shield tunneling machine, and the control system is used for controlling the grouting pressure of the shield tunneling machine.

2. The apparatus of claim 1, wherein the control system compares the formation pressure measured by the second soil pressure gauge with the grouting pressure measured by the first soil pressure gauge, and adjusts the grouting pressure until the pressures are balanced.

3. The device for monitoring the shield tail pressure balance of the shield tunneling machine according to claim 2, wherein the first soil pressure gauge comprises a cylinder and a conical head arranged at one end of the cylinder, a partition is arranged inside the cylinder, the partition divides the inside of the cylinder into a first chamber and a second chamber, the second chamber is close to the conical head, a pressure measuring part is arranged on one side of the partition, which faces the second chamber, and a through hole is arranged on the side wall of the second chamber.

4. The device as claimed in claim 3, wherein the pressure measuring unit comprises a fixed base fixedly connected to the partition plate in an embedded manner, the fixed base comprises a back plate and an induction plate, and a vibration exciting electromagnetic coil is arranged between the induction plate and the back plate.

5. The device for monitoring the shield tail pressure balance of the shield tunneling machine according to claim 4, wherein an auxiliary measuring assembly is disposed on an inner wall of the second chamber opposite to the partition, the auxiliary measuring assembly includes a pressure sensor fixedly connected to the inner wall of the second chamber, the pressure sensor is disposed corresponding to the pressure measuring member, a movable touch panel is disposed above the pressure sensor, the movable touch panel is movably engaged with the inner wall of the second chamber, and a connecting spring is disposed between the movable touch panel and the pressure sensor.

6. The device for monitoring the shield tail pressure balance of the shield tunneling machine according to claim 5, wherein a threaded sleeve is arranged at the upper end of the cylinder, an adjusting screw rod is sleeved in an inner cavity of the threaded sleeve and extends to the inside of the first chamber, and a limiting component is connected to the end of the adjusting screw rod.

7. The device for monitoring the shield tail pressure balance of the shield tunneling machine according to claim 6, wherein the limiting component comprises a movable member, the movable member is connected to the end of the adjusting screw, an adjusting link is movably connected below the movable member, a fixed block is movably connected to the lower end of the adjusting link, a limiting slider is arranged below the fixed block, a guide rod is arranged between the inner walls of the two sides of the first chamber, and the limiting slider is movably sleeved on the guide rod.

8. The device for monitoring the shield tail pressure balance of the shield tunneling machine according to claim 7, wherein a plurality of limiting rods are arranged on the side surface of the fixing block, and the ends of the limiting rods penetrate through the side wall of the cylinder.

9. The device for monitoring the shield tail pressure balance of the shield tunneling machine according to any one of claims 1-8, wherein a protective tube is arranged on the outer wall of the cylinder body, and a signal transmission line is installed in the protective tube and is electrically connected with the pressure measuring part and the auxiliary measuring component respectively.

10. The device for monitoring the shield tail pressure balance of the shield tunneling machine according to claim 9, wherein the protective tube and the cylinder form an integrated structure, the protective tube comprises a central tube, and an explosion-proof glass tube is sleeved on the outer wall of the central tube.

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