A circulating grease injection shield tail sealing structure and sealing grease injection method thereof

Abstract

The present invention belongs to the technical field of shield machines, and particularly relates to a circulating grease-injected shield tail sealing structure and a sealing grease-injection method thereof. The sealing structure comprises a shield tail shell, a grease-injection pipeline, and a shield tail brush arranged at the rear end of the shield tail shell; the shield tail brush comprises an annular shield tail brush and a longitudinal shield tail brush, and there are multiple annular shield tail brushes, which are arranged in sequence along the axial direction, and an annular sealing cavity is formed between two adjacent annular shield tail brushes, and each annular sealing cavity is divided into multiple independent tail shield sealing cavities by multiple longitudinal shield tail brushes arranged at intervals along the circumferential direction, and each tail shield sealing cavity is greased by at least one grease-injection pipeline, and the grease-injection pipeline is arranged on the inner wall of the shield tail shell, and each grease-injection pipeline is provided with a grease-injection flow detection device, and the grease-injection cavity is provided with a terminal detection device, which can detect whether the pressure and injection amount in the cavity are uniform. The present invention saves process time, avoids waste of grease, and prevents the shield tail sealing pipeline from being easily blocked, and the cavities and uneven grease injection in the grease-injection cavity are easily generated.

Description

Technical Field

[0001] The invention belongs to the technical field of shield machines, and particularly relates to a circulating grease injection shield tail sealing structure and a sealing grease injection method thereof. Background Art

[0002] At present, the structure of the shield tail sealing control system on the market is relatively simple, and the degree of automation is not high. There are the following specific problems: Due to the limitations of its structure and control, the existing technology cannot accurately monitor the amount of grease injected into the sealing chamber of each segment of the shield tail, so it cannot effectively and targetedly replenish grease, resulting in uneven grease injection, and the traditional process has a long waiting and grease injection process. The tunnel project is long, which increases the overall cumulative construction time, resulting in an extension of the construction period, resulting in a waste of time and grease. The structure and pipelines of the existing technology are prone to blockage, and cavities and uneven grease injection are prone to occur in the grease injection cavity, which can easily lead to water leakage and sand and gravel slurry influx. During the construction of the shield machine, the traditional grease system is greatly affected by the injection volume of the shield tail, and its monitoring system cannot reflect the status of the tail shield sealing chamber in real time, and the time to discover problems and failures is slow, causing hidden dangers in construction quality. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a circulating grease injection shield tail sealing structure and a sealing grease injection method thereof, so as to solve the problems that the existing shield tail sealing structure and pipelines of the shield machine are easily blocked, cavities are easily generated in the grease injection cavity, grease injection is uneven, and water leakage and sand and gravel slurry influx are easily caused.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An embodiment of the present invention provides a circulating grease-injected shield tail sealing structure, comprising a shield tail shell, a grease injection pipeline and a shield tail brush arranged at the rear end of the shield tail shell, wherein the shield tail brush comprises an annular shield tail brush and a longitudinal shield tail brush, there are multiple annular shield tail brushes, and they are arranged in sequence at intervals along the axial direction, and an annular sealing cavity is formed between two adjacent annular shield tail brushes, each annular sealing cavity is divided into multiple independent tail shield sealing cavities by multiple longitudinal shield tail brushes arranged at intervals along the circumferential direction, each tail shield sealing cavity is greased by at least one grease injection pipeline, the grease injection pipeline is arranged on the inner wall of the shield tail shell, each grease injection pipeline is provided with a grease injection flow detection device, and each tail shield sealing cavity is provided with a terminal detection device.

[0006] A segment monitoring device is provided on the contact surface between the shield tail brush and the segment, and the segment monitoring device is used to monitor the segment pressure and the shield tail gap.

[0007] The rear end of the shield tail shell is provided with a shield tail shell diameter reducing portion with a shrinking diameter, and the shield tail brush is arranged on the shield tail shell diameter reducing portion;

[0008] The rear end of the grease injection pipeline passes through the shield tail shell and is placed outside the diameter reducing portion of the shield tail shell. The grease outlet of the grease injection pipeline is inserted into the corresponding tail shield sealing cavity.

[0009] A bending portion is provided at the position where the grease injection pipeline passes through the shield tail shell.

[0010] The grease injection pipeline comprises a plurality of pipeline sections connected in sequence, and adjacent pipelines are detachably connected via buckles.

[0011] Another embodiment of the present invention provides a sealing grease injection method for the above-mentioned circulating grease injection shield tail sealing structure, wherein the sealing grease injection method includes an independent control mode and a sequential control mode;

[0012] Independent control mode: select the grease pipeline through the human-machine interactive interface to inject grease into the corresponding tail shield sealing cavity, and automatically detect the injection pressure in the grease pipeline and the total grease pressure of the tail shield in the tail shield sealing cavity;

[0013] Sequential control mode: All grease injection pipelines are grouped through the human-machine interactive interface, and the grouped grease injection pipelines are greased in sequence and the grease injection pressure is tested.

[0014] The independent control mode includes the following steps:

[0015] Select the grease injection pipeline, and set the standard grease injection pressure value and the standard shield tail grease total pressure value;

[0016] The selected grease injection pipeline injects grease into the corresponding tail shield sealing cavity;

[0017] Determine whether the grease injection pressure in the selected grease injection pipeline reaches the standard grease injection pressure value:

[0018] If the standard grease injection pressure value is not reached, continue grease injection;

[0019] If the standard grease injection pressure value is reached, proceed to the next step;

[0020] Determine whether the total pressure of the tail shield grease in the tail shield sealing cavity reaches the standard total pressure value of the tail shield grease:

[0021] If the total pressure value of the standard shield tail grease is not reached, continue to inject grease;

[0022] If the total pressure of the standard shield tail grease reaches the value, the grease injection is completed.

[0023] The sequential control mode comprises the following steps:

[0024] Automatically group all grease injection pipelines and set standard grease injection pressure values;

[0025] The first group of grease injection pipelines inject grease into the corresponding tail shield sealing cavity;

[0026] Determine whether the grease injection pressure value of the first group of grease injection pipelines reaches the standard grease injection pressure value:

[0027] If the standard grease injection pressure value is not reached, continue grease injection;

[0028] If the standard grease injection pressure value is reached, proceed to the next step;

[0029] Determine whether the delay is over;

[0030] Start the second group of grease injection pipelines to inject grease into the corresponding tail shield sealing cavity;

[0031] Determine whether the grease injection pressure value of the second group of grease injection pipelines reaches the standard grease injection pressure value:

[0032] If the standard grease injection pressure value is not reached, continue grease injection;

[0033] If the standard grease injection pressure value is reached, proceed to the next step;

[0034] Determine whether the delay is over;

[0035] Complete the grease injection of the 3rd to Nth groups of grease injection pipelines in sequence;

[0036] Determine whether the total grease pressure at the shield tail reaches the set value:

[0037] If the set value is not reached, the grease injection procedure is repeated in a cycle;

[0038] If the set value is reached, grease injection is completed.

[0039] The grease injection flow rate in the grease injection pipeline is detected by a grease injection flow rate detection device arranged on the grease injection pipeline; the pressure and injection amount of the shield tail grease chamber are detected by a terminal detection device arranged in the tail shield sealing chamber; whether the shield tail brush is in contact with the segment seal and the shield tail gap are detected by a pipe segment monitoring device; the grease injection flow rate detection device, the terminal detection device and the pipe segment monitoring device are connected to the control system.

[0040] When the grease injection pipeline is blocked and the injection amount in the tail shield sealing cavity is uneven or a cavity appears, the control system prompts and alarms.

[0041] The advantages and beneficial effects of the present invention are as follows: the present invention provides a circulating grease injection shield tail sealing structure, which can accurately inject the grease at the shield tail into the sealing chamber of each pipe segment, thereby solving the problem of uneven grease injection, saving process time, and avoiding grease waste; at the same time, the shield tail grease is not easy to be blocked, the pipeline is relatively easy to clean, and the problem of delayed fault alarm detection is solved.

[0042] The present invention provides a control method for a circulating grease-injected shield tail sealing structure, which can automatically detect whether the amount of grease injected into the sealing chamber under each segment meets the working conditions after the segments are in place, thereby automatically detecting and automatically replenishing grease. At the same time, it can monitor whether the force at the position of the segments is uniform, whether the segments are placed stably, and whether the chamber pressure is normal. Its structure and control method enable the shield tail sealing device to effectively control the problems of easy leakage of the shield tail seal and the influx of sand and gravel slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of a circulating grease injection shield tail sealing structure in one embodiment of the present invention;

[0044] Figure 2 It is a partial schematic diagram of a circulating grease injection shield tail sealing structure in one embodiment of the present invention;

[0045] Figure 3 It is a schematic diagram of the installation of the shield tail brush in one embodiment of the present invention;

[0046] Figure 4 It is a schematic diagram of the expansion of the shield tail grease sealing chamber in one embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of a grease injection pipeline in one embodiment of the present invention;

[0048] Figure 6 for Figure 5 The enlarged image of point Ⅰ in the middle;

[0049] Figure 7 A flowchart of a sealing grease injection method according to another embodiment of the present invention;

[0050] In the figure: 1 is the shield tail shell, 2 is the grease injection pipeline, 3 is the annular shield tail brush, 4 is the longitudinal shield tail brush, 5 is the tail shield sealing chamber, 6 is the grease injection flow detection device, 7 is the buckle, 8 is the terminal detection device, 9 is the pipe segment, 10 is the cutter disc, 11 is the reducer of the shield tail shell, 12 is the stop plate, 13 is the pipe segment monitoring device, 21 is the grease inlet, 22 is the grease outlet, and 23 is the bending part. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] like Figure 1-4As shown, an embodiment of the present invention provides a circulating grease-injected shield tail sealing structure, comprising a shield tail shell 1, a grease injection pipeline 2 and a shield tail brush arranged at the rear end of the shield tail shell 1, wherein the shield tail brush comprises an annular shield tail brush 3 and a longitudinal shield tail brush 4, there are multiple annular shield tail brushes 3, and they are arranged in sequence along the axial direction, and an annular sealing cavity is formed between two adjacent annular shield tail brushes 3, each annular sealing cavity is divided into a plurality of independent tail shield sealing cavities 5 by a plurality of longitudinal shield tail brushes 4 arranged at intervals along the circumferential direction, each tail shield sealing cavity 5 is greased by at least one grease injection pipeline 2, and the grease injection pipeline 2 is arranged on the inner wall of the shield tail shell 1, each grease injection pipeline 2 is provided with a grease injection flow detection device 6, and each tail shield sealing cavity 5 is provided with a terminal detection device 8, and the terminal detection device 8 is used to detect whether the pressure in the cavity and the injection amount are uniform.

[0053] In the embodiment of the present invention, each annular sealing cavity is composed of a plurality of small sealing chambers (tail shield sealing cavity 5), and grease enters the plurality of tail shield sealing cavities 5 composed of the tail brush and the pipe segment through the grease injection pump and the grease injection pipeline 2. This structure can effectively avoid uneven grease injection and waste, and can effectively prevent mortar and water from flowing into the tail of the shield, thereby ensuring the construction quality.

[0054] like Figure 4 As shown, in an embodiment of the present invention, a segment monitoring device 13 is also provided on the contact surface between the tail brush of the shield and the segment. The segment monitoring device 13 is used to detect the pressure on the segment when the tail brush of the shield contacts the segment, so as to determine whether the tail brush of the shield contacts the segment in a sealed manner, thereby improving the sealing performance of the tail shield sealing cavity 5 and monitoring the shield tail gap. The terminal detection device 8 is installed on the tail shield sealing cavity shell 1, and the grease injection pressure in the tail shield sealing cavity 5 is detected by the terminal detection device 8. The grease injection flow detection device 6, the terminal detection device 8 and the segment monitoring device 13 are all connected to the control system. When the injection amount in the tail shield sealing cavity 5 is uneven and a cavity appears, the control system prompts an alarm and a fault to prevent mortar and groundwater from entering the shield machine and affecting construction safety. Specifically, the terminal detection device 8 adopts a pressure sensor; the segment monitoring device 13 adopts a segment monitoring sensor, which can detect pressure and displacement.

[0055] like Figure 1-2 , Figure 5 As shown, in the embodiment of the present invention, the rear end of the shield tail shell 1 is provided with a shield tail shell reducing portion 11 with a reduced diameter, that is, the diameter of the shield tail shell reducing portion 11 is smaller than the diameter of the shield tail shell 1, and the shield tail brush is arranged on the inner wall of the shield tail shell reducing portion 11. The grease injection pipeline 2 is axially installed on the inner wall of the shield tail shell 1, and the rear end of the grease injection pipeline 2 penetrates the shield tail shell 1 and is arranged outside the shield tail shell reducing portion 11, and the grease outlet 22 of the grease injection pipeline 2 is inserted into the corresponding tail shield sealing cavity 5.

[0056] like Figure 5-6As shown, in the embodiment of the present invention, the two ends of the grease injection pipeline 2 are respectively a grease inlet 21 and a grease outlet 22, wherein the grease inlet 21 is a bent structure to facilitate pipeline connection; further, a bending portion 23 is provided at the position where the grease injection pipeline 2 passes through the shield tail shell 1, so that the grease injection pipeline 2 can extend to the outside of the shield tail shell reducing portion 11 after passing through the shield tail shell 1.

[0057] In the embodiment of the present invention, the grease injection pipeline 2 includes multiple pipelines connected in sequence, and adjacent pipelines are detachably connected by buckles 7. When the grease injection flow detection device 6 detects pipeline blockage, it can be discovered in time, and the buckle 7 is convenient for disassembly and maintenance.

[0058] The invention provides a circulating grease-injected shield tail sealing structure, which can accurately monitor the grease injection amount of each pipe segment of the shield tail and accurately supplement the missing amount without manual adjustment and monitoring. The sealing structure solves the problem of uneven grease injection at the shield tail, saves process time, and avoids waste of grease. The detection sensor and control system solve the problem of easy grease blockage at the shield tail and difficulty in cleaning the pipeline, and solves the problem of delayed fault alarm detection, thereby saving resources and shortening the construction period.

[0059] Based on the above design ideas, another embodiment of the present invention provides a sealing grease injection method for a cyclic grease injection shield tail sealing structure as in any of the above embodiments, and the sealing grease injection method includes an independent control mode and a sequential control mode.

[0060] Independent control mode: Grease is injected into the corresponding tail shield sealing cavity 5 through the selected grease pipeline 2, and the injection pressure in the grease pipeline 2 and the total shield tail grease pressure in the tail shield sealing cavity 5 are automatically detected.

[0061] Specifically, on the human-machine interface (HMI) screen, select and activate the corresponding work line button, and then enter the pressure setting value. The selected grease pipeline 2 will be accurately greased under the PID algorithm, so that the pressure in the shield tail sealing cavity 5 is continuously stabilized at the preset value. The control system will automatically determine whether the pressure of each chamber in the tail shield sealing cavity 5 meets the standard based on the detection values ​​of the grease injection flow detection device 6 and the terminal detection device 8, and cyclically grease the shield tail sealing cavity 5 that does not meet the pressure standard. The control system will automatically monitor the injection status in the shield tail grease cavity and optimize the grease injection sequence and grease injection amount of the pipe segment.

[0062] Sequential control mode: All grease injection pipelines 2 are grouped, and the grouped grease injection pipelines 2 are greased in sequence and the grease injection pressure is tested.

[0063] Specifically, when the user selects the sequential control mode on the human-machine interface (HMI), the control system will automatically set a group number and the corresponding preset grease pressure and amount for each grease injection pipeline 2 according to the current grouting volume, segment splicing sequence, excavation data, and automatic identification and screening. The grouped grease pipeline 2 will be accurately greased under the PID algorithm to keep the pressure in the shield tail sealing cavity 5 stable at the preset value. The number of working cycles is that the control system starts working from the group with the smallest number. When the preset working cycle and preset value are completed, the current group is closed and the next group is opened. The control system will automatically determine whether the overall pressure of the sealing cavity meets the standard, and cyclically grease the shield tail sealing cavity 5 that does not meet the pressure standard. The control system will automatically monitor the segment splicing status, optimize the segment grease injection sequence, and automatically detect the grease injection of the single segment after splicing.

[0064] like Figure 7 As shown, in the embodiment of the present invention, the independent control mode includes the following steps:

[0065] Select grease injection pipeline 2, and set the standard grease injection pressure value and the standard shield tail grease total pressure value;

[0066] The selected grease injection pipeline 2 injects grease into the corresponding tail shield sealing cavity 5;

[0067] Determine whether the grease injection pressure in the selected grease injection pipeline 2 reaches the standard grease injection pressure value:

[0068] If the standard grease injection pressure value is not reached, continue grease injection;

[0069] If the standard grease injection pressure value is reached, proceed to the next step;

[0070] Determine whether the total pressure of the tail shield grease in the tail shield sealing cavity 5 reaches the standard total pressure value of the tail shield grease:

[0071] If the total pressure value of the standard shield tail grease is not reached, continue to inject grease;

[0072] If the total pressure of the standard shield tail grease reaches the value, the grease injection is completed.

[0073] like Figure 7 As shown, in the embodiment of the present invention, the sequential control mode includes the following steps:

[0074] Automatically group all grease injection pipelines 2 and set standard grease injection pressure values;

[0075] The first group of grease injection pipelines inject grease into the corresponding tail shield sealing cavity 5;

[0076] Determine whether the grease injection pressure value of the first group of grease injection pipelines reaches the standard grease injection pressure value:

[0077] If the standard grease injection pressure value is not reached, continue grease injection;

[0078] If the standard grease injection pressure value is reached, proceed to the next step;

[0079] Determine whether the delay is over;

[0080] Start the second group of grease injection pipelines to inject grease into the corresponding tail shield sealing cavity 5;

[0081] Determine whether the grease injection pressure value of the second group of grease injection pipelines reaches the standard grease injection pressure value:

[0082] If the standard grease injection pressure value is not reached, continue grease injection;

[0083] If the standard grease injection pressure value is reached, proceed to the next step;

[0084] Determine whether the delay is over;

[0085] Complete the grease injection of the 3rd to Nth groups of grease injection pipelines in sequence;

[0086] Determine whether the total grease pressure at the shield tail reaches the set value:

[0087] If the set value is not reached, the grease injection procedure is repeated in a cycle;

[0088] If the set value is reached, grease injection is completed.

[0089] Furthermore, the grease injection flow rate in the grease injection pipeline 2 is detected by the grease injection flow rate detection device 6 disposed on the grease injection pipeline 2; the pressure of the shield tail grease chamber is detected by the terminal detection device 8 disposed in the tail shield sealing chamber 5; the pressure of the pipe segment when the shield tail brush contacts the pipe segment is detected by the pipe segment monitoring device 13, so as to determine whether the shield tail brush contacts the pipe segment seal and monitor the shield tail gap. The grease injection flow rate detection device 6, the terminal detection device 8 and the pipe segment monitoring device 13 are all connected to the control system. When the grease injection pipeline 2 is blocked and the injection amount in the tail shield sealing chamber 5 is uneven or a cavity appears, the control system prompts and alarms.

[0090] The above two grease injection modes are different from the traditional grease injection mode. This control system adopts fuzzy control algorithm and changes the design of grease injection chamber and structure. After the pipe segment is in place, it can automatically detect whether the amount of grease injected into the sealing chamber under each pipe segment meets the working conditions, so as to automatically detect and automatically replenish grease. At the same time, it can monitor whether the force at the position of the pipe segment is uniform, whether the pipe segment is placed stably, and whether the chamber pressure is normal. When it is detected that a single pipe segment is placed and spliced, grease can be injected, without waiting until the splicing of the entire ring of pipe segments is completed, which improves work efficiency.

[0091] The present invention provides a sealing grease injection method for a circulating grease injection shield tail sealing structure, which can accurately monitor the grease injection amount of each pipe segment of the shield tail and accurately supplement the missing amount without manual adjustment and monitoring. The control method and structure solve the problem of uneven grease injection at the shield tail, save process time, and avoid waste of grease. Its monitoring system and shield tail grease structure solve the problem of easy clogging of shield tail grease and difficulty in cleaning pipelines, and solve the problem of slow fault alarm detection, thereby saving resources and shortening construction period.

[0092] The above description is only an embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A circulating grease-injected shield tail sealing structure, characterized in that: The invention comprises a shield tail shell (1), a grease injection pipeline (2) and a shield tail brush arranged at the rear end of the shield tail shell (1), wherein the shield tail brush comprises an annular shield tail brush (3) and a longitudinal shield tail brush (4), wherein the annular shield tail brush (3) is multiple and is arranged in sequence at intervals along the axial direction, and an annular sealing cavity is formed between two adjacent annular shield tail brushes (3), and each annular sealing cavity is divided into a plurality of independent tail shield sealing cavities (5) by a plurality of longitudinal shield tail brushes (4) arranged at intervals along the circumferential direction, and each tail shield sealing cavity (5) is greased by at least one grease injection pipeline (2), and the grease injection pipeline (2) is arranged on the inner wall of the shield tail shell (1), and each grease injection pipeline (2) is provided with a grease injection flow detection device (6), and each tail shield sealing cavity (5) is provided with a terminal detection device (8), and the terminal detection device (8) is used to detect whether the chamber pressure and injection amount of the tail shield sealing cavity (5) are uniform; A segment monitoring device (13) is provided on the contact surface between the shield tail brush and the segment, and the segment monitoring device (13) is used to monitor the segment pressure and the shield tail gap; The grease injection flow detection device (6), the terminal detection device (8) and the pipe segment monitoring device (13) are all connected to a control system; when the grease injection pipeline (2) is blocked and the injection volume in the tail shield sealing cavity (5) is uneven or a cavity appears, the control system prompts and alarms.

2. The circulating grease injection shield tail sealing structure according to claim 1 is characterized in that: The rear end of the shield tail shell (1) is provided with a shield tail shell diameter reducing portion (11) with a reduced diameter, and the shield tail brush is arranged on the shield tail shell diameter reducing portion (11); The rear end of the grease injection pipeline (2) passes through the shield tail shell (1) and is placed outside the shield tail shell diameter reducing portion (11), and the grease outlet (22) of the grease injection pipeline (2) is inserted into the corresponding tail shield sealing cavity (5).

3. The circulating grease injection shield tail sealing structure according to claim 2 is characterized in that: A bent portion (23) is provided at the position where the grease injection pipeline (2) passes through the shield tail shell (1).

4. The circulating grease injection shield tail sealing structure according to claim 3 is characterized in that: The grease injection pipeline (2) comprises a plurality of pipeline sections connected in sequence, and adjacent pipelines are detachably connected via buckles (7).

5. A sealing grease injection method for a circulating grease injection shield tail sealing structure as claimed in any one of claims 1 to 4, characterized in that: The sealing grease injection method includes an independent control mode and a sequential control mode; Independent control mode: select the grease pipeline (2) through the human-machine interactive interface to inject grease into the corresponding tail shield sealing cavity (5), and automatically detect the injection pressure in the grease pipeline (2) and the total pressure of the shield tail grease in the tail shield sealing cavity (5); Sequential control mode: All grease injection pipelines (2) are grouped through the human-machine interactive interface, and the grouped grease injection pipelines (2) are greased in sequence and the grease injection pressure is tested.

6. The sealing grease injection method according to claim 5, characterized in that: The independent control mode includes the following steps: Select the grease injection pipeline (2), and set the standard grease injection pressure value and the standard shield tail grease total pressure value; The selected grease injection pipeline (2) injects grease into the corresponding tail shield sealing cavity (5); Determine whether the grease injection pressure in the selected grease injection pipeline (2) reaches the standard grease injection pressure value: If the standard grease injection pressure value is not reached, continue grease injection; If the standard grease injection pressure value is reached, proceed to the next step; Determine whether the total pressure of the tail shield grease in the tail shield sealing chamber (5) reaches the standard total pressure value of the tail shield grease: If the total pressure value of the standard shield tail grease is not reached, continue to inject grease; If the total pressure of the standard shield tail grease reaches the value, the grease injection is completed.

7. The sealing grease injection method according to claim 5, characterized in that: The sequential control mode comprises the following steps: Automatically group all grease injection pipelines (2) and set standard grease injection pressure values; The first group of grease injection pipelines inject grease into the corresponding tail shield sealing cavity (5); Determine whether the grease injection pressure value of the first group of grease injection pipelines reaches the standard grease injection pressure value: If the standard grease injection pressure value is not reached, continue grease injection; If the standard grease injection pressure value is reached, proceed to the next step; Determine whether the delay is over; Starting the second group of grease injection pipelines to inject grease into the corresponding tail shield sealing cavity (5); Determine whether the grease injection pressure value of the second group of grease injection pipelines reaches the standard grease injection pressure value: If the standard grease injection pressure value is not reached, continue grease injection; If the standard grease injection pressure value is reached, proceed to the next step; Determine whether the delay is over; Complete the grease injection of the 3rd to Nth groups of grease injection pipelines in sequence; Determine whether the total grease pressure at the shield tail reaches the set value: If the set value is not reached, the grease injection procedure is repeated in a cycle; If the set value is reached, grease injection is completed.

8. The sealing grease injection method according to claim 5, characterized in that: The grease injection flow rate in the grease injection pipeline (2) is detected by a grease injection flow rate detection device (6) disposed on the grease injection pipeline (2); the pressure in the chamber and the injection amount are detected by a terminal detection device (8) disposed in the tail shield sealing chamber (5) to determine whether the chamber pressure and the injection amount are uniform; and the segment monitoring device (13) is used to detect whether the shield tail brush is in sealing contact with the segment and monitor the shield tail gap.

9. The sealing grease injection method according to claim 8, characterized in that: When the grease injection pipeline (2) is blocked and the injection amount in the tail shield sealing cavity (5) is uneven or a cavity appears, the control system prompts and alarms.

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