Shield tunneling machine main drive sealing structure, manufacturing method and temperature monitoring method

Abstract

The invention relates to a shield tunneling machine main drive sealing structure, a manufacturing method and a temperature monitoring method. The shield tunneling machine main drive sealing structure comprises a sealing piece body used for sealing a shield tunneling machine main drive, and the sealing piece body is provided with a lip which is in sealing contact with a driving shaft of the shield tunneling machine main drive in an assembling state; the temperature sensor is embedded in the position, close to the lip, in the sealing element body, and the temperature sensor is used for collecting the temperature value of the lip position or the temperature value close to the lip position. The technical problems that the real-time temperature measurement precision of the main drive sealing structure of the shield tunneling machine is low, the reliability of the measurement result is poor, and the installation structure of the measurement device is complex are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and further to a shield machine main drive sealing structure with a temperature monitoring function, a manufacturing method and a temperature monitoring method, and in particular to a polyurethane sealing structure, a manufacturing method and a temperature monitoring method. Background Art

[0002] Real-time monitoring of the working status of the seal of the main drive of the shield machine can help us understand the working status of the seal of the main drive of the shield machine and carry out early warning in time. The key parameters that affect the performance of the seal mainly include the wear, temperature, deformation, etc. of the seal. For seals made of polyurethane, due to their poor high temperature resistance, when used in some high-speed and high-pressure working conditions, the heat generated is large, which seriously affects the performance of the seal. It is necessary to monitor the temperature changes of the sealing lip in real time.

[0003] At present, the lip temperature monitoring of polyurethane seals mostly adopts indirect measurement methods. By measuring the temperature of the sealing friction plate in contact with the sealing lip, the lip temperature of the seal is indirectly estimated. This method not only has low measurement accuracy and poor reliability of measurement results, but also has a complex installation structure, and the actual use effect is not ideal.

[0004] Therefore, the inventor, relying on many years of experience and practice in related industries, proposes a shield machine main drive sealing structure, a manufacturing method and a temperature monitoring method to overcome the defects of the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a shield machine main drive sealing structure, a manufacturing method and a temperature monitoring method. By installing a temperature sensor at the sealing lip position, the temperature change at the lip position of the shield machine main drive seal can be directly monitored, with higher measurement accuracy and more reliable measurement.

[0006] The purpose of the present invention is to provide a shield machine main drive sealing structure, manufacturing method and temperature monitoring method, the lip position of the seal is set in sections, and a groove is opened on its end face, and a temperature sensor is embedded in the groove position and then poured and sealed, so as to achieve precise positioning and installation of the temperature sensor, and the installation structure is simple and easy to operate.

[0007] The purpose of the present invention can be achieved by adopting the following scheme:

[0008] The present invention provides a shield machine main drive sealing structure, the shield machine main drive sealing structure comprising:

[0009] A seal body for sealing a main drive of a shield machine, wherein the seal body has a lip in sealing contact with a drive shaft of the main drive of the shield machine in an assembled state;

[0010] At least one temperature sensor is embedded in the sealing body and close to the lip, and is used to collect a temperature value at or near the lip.

[0011] In a preferred embodiment of the present invention, a positioning groove is provided in the sealing body and near the lip, the temperature sensor is arranged in the positioning groove, a data transmission line is connected to the temperature sensor, and the data transmission line extends to the outside of the sealing body.

[0012] In a preferred embodiment of the present invention, the seal body includes a body section and a lip section, a first recess is formed on one end surface of the body section, and / or a second recess is formed on one end surface of the lip section, and when the end surface of the body section and the end surface of the lip section are in contact, the first recess or the second recess or the first recess cooperates with the second recess to form the positioning groove;

[0013] A sealing filler is arranged at the gap between the temperature sensor and the positioning groove.

[0014] In a preferred embodiment of the present invention, the sealing filler is formed by pouring and curing polyurethane liquid at the gap between the temperature sensor and the positioning groove.

[0015] In a preferred embodiment of the present invention, the sealing body is made of polyurethane material.

[0016] In a preferred embodiment of the present invention, the seal body is an annular structure arranged along the outer circumference of the driving shaft of the main drive of the shield machine, and there are multiple temperature sensors, which are arranged at intervals along the circumference of the seal body.

[0017] In a preferred embodiment of the present invention, the main drive sealing structure of the shield machine also includes a data acquisition device and a display device, the temperature sensor is connected to the data receiving end of the data acquisition device through the data transmission line, and the data output end of the data acquisition device is connected to the data receiving end of the display device through the data transmission line.

[0018] The present invention provides a method for manufacturing a main drive sealing structure of a shield machine, wherein the method is used to manufacture the main drive sealing structure of the shield machine, and the manufacturing method comprises the following steps:

[0019] The sealing body is manufactured in sections, wherein the sealing body at least comprises a body section and a lip section, and the body section and the lip section respectively have matching end surfaces;

[0020] Positioning and slotting on the end surface of the body segment, or on the end surface of the lip segment, or on the end surface of the body segment and the end surface of the lip segment respectively;

[0021] Placing a temperature sensor at the slotted position and temporarily fixing it, and leading a data transmission line connected to the temperature sensor to the outside of the sealing body;

[0022] Align the end surface of the body segment with the end surface of the lip segment, and reserve a gap between them;

[0023] Pouring a sealing connecting agent at the gap position to seal the end surface of the body segment with the end surface of the lip segment;

[0024] Sealing and connecting the end surface of the body section and the end surface of the lip section at different positions along the circumference of the seal body to form a full circle of the seal body;

[0025] The transmission line is connected to an external data acquisition device and a display device.

[0026] In a preferred embodiment of the present invention, the segmented production of the sealing body comprises:

[0027] mixing a polyurethane prepolymer with a chain extender;

[0028] pouring the mixed liquid into at least a first mold and a second mold respectively;

[0029] The body segment and the lip segment are vulcanized and molded in the first mold and the second mold respectively.

[0030] In a preferred embodiment of the present invention, the inner contour of the slotted position is larger than the outer contour of the temperature sensor, so that the temperature sensor is completely placed in the slotted position.

[0031] In a preferred embodiment of the present invention, the inner wall of the groove position is roughened so that the inner wall of the groove position has a preset roughness.

[0032] In a preferred embodiment of the present invention, the step of placing the temperature sensor at the slotted position and temporarily fixing it comprises:

[0033] Place the end surface of the body segment or the end surface of the lip segment having the slotted position upward and keep it horizontal;

[0034] Applying glue to the bottom of the slotted position;

[0035] The temperature sensor is placed in the slotted position, with the bottom of the temperature sensor in contact with the glue.

[0036] In a preferred embodiment of the present invention, the end face of the body segment is aligned with the end face of the lip segment, and a gap is reserved between the two, and the gap between the end face of the body segment and the end face of the lip segment is 5 mm to 15 mm.

[0037] In a preferred embodiment of the present invention, the step of pouring a sealing connecting agent at the gap position to seal the end surface of the body segment with the end surface of the lip segment comprises:

[0038] Pouring a sealing connecting agent from the gap position until the sealing connecting agent fills the gap between the slot position and the temperature sensor and the gap between the end surface of the body section and the end surface of the lip section, wherein the sealing connecting agent comprises polyurethane liquid;

[0039] The poured polyurethane liquid is left to stand for a preset time until solidification.

[0040] The present invention provides a temperature monitoring method for a main drive sealing structure of a shield machine, wherein the temperature monitoring method for the main drive sealing structure of a shield machine is used to monitor the temperature at any position on the sealing body, and the temperature monitoring method comprises the following steps:

[0041] Obtaining the temperature gradient at different positions of the seal body;

[0042] According to the temperature change gradient, a temperature difference between any position of the seal body and a position where the temperature sensor is located on the seal body is obtained;

[0043] The actual temperature value at the lip position on the sealing body or near the lip position is collected by the temperature sensor;

[0044] The actual temperature value at any position of the sealing body is obtained according to the temperature difference and the actual temperature value collected by the temperature sensor.

[0045] As described above, the main drive sealing structure, manufacturing method and temperature monitoring method of the shield machine of the present invention have the following characteristics and advantages:

[0046] A temperature sensor is buried in the sealing body used to seal the main drive of the shield machine and near the lip. During actual operation, the temperature sensor can collect the temperature value at the lip position of the sealing body or near the lip position, thereby monitoring the temperature change at the lip position of the sealing body of the main drive of the shield machine or near the lip position, with higher measurement accuracy and more reliable measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0048] in:

[0049] Figure 1 : It is a schematic diagram of the main drive sealing structure of the shield machine of the present invention.

[0050] Figure 2 : It is a structural schematic diagram of the lip section in the main drive sealing structure of the shield machine of the present invention.

[0051] Figure 3 : It is a structural schematic diagram of the body section and the lip section in the main drive sealing structure of the shield machine of the present invention.

[0052] Figure 4 : is a flow chart of the manufacturing method of the main drive sealing structure of the shield machine of the present invention.

[0053] Figure 5 : is a flow chart of the temperature monitoring method of the main drive sealing structure of the shield machine of the present invention.

[0054] The accompanying drawings in the present invention are:

[0055] 1. Seal body; 101. Body section;

[0056] 102. Lip segment; 2. Temperature sensor;

[0057] 3. Data acquisition device; 4. Display device;

[0058] 5. Data transmission line; 6. Positioning slot. DETAILED DESCRIPTION

[0059] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0060] Implementation Method 1

[0061] like Figures 1 to 3 As shown, the present invention provides a shield machine main drive sealing structure, which includes: a sealing body 1 for sealing the shield machine main drive, the sealing body 1 having a lip (i.e., the end position of the sealing lip) that is in sealing contact with the drive shaft of the shield machine main drive in an assembled state; at least one temperature sensor 2, the temperature sensor 2 is buried in the sealing body 1 and close to the lip, and the temperature sensor 2 is used to collect the temperature value at the lip position or close to the lip position.

[0062] In the present invention, a temperature sensor 2 is buried in a sealing body 1 for sealing the main drive of a shield machine and near the lip. During the actual working process, the temperature sensor 2 can collect the temperature value at the lip position or near the lip position of the sealing body 1, thereby monitoring the temperature change at the lip position or near the lip position of the sealing body 1 of the main drive of the shield machine, with higher measurement accuracy and more reliable measurement.

[0063] In an optional embodiment of the present invention, Figure 2 As shown, a positioning groove 6 is provided inside the sealing body 1 and near the lip, and the temperature sensor 2 is arranged in the positioning groove 6. A data transmission line 5 is connected to the temperature sensor 2, and the data transmission line 5 extends to the outside of the sealing body 1 for transmitting the temperature information collected by the temperature sensor 2.

[0064] In an optional embodiment of the present invention, the seal body 1 includes a body section 101 and a lip section 102. A first recess is provided on one end face of the body section 101. When the end face of the body section 101 and the end face of the lip section 102 are in a butt joint state, the first recess forms the above-mentioned positioning groove 6 for accommodating the temperature sensor 2. In another optional embodiment of the present invention, Figure 2 , Figure 3 As shown, a second recess is provided on one end face of the lip section 102. When the end face of the body section 101 and the end face of the lip section 102 are in a docking state, the second recess forms the above-mentioned positioning groove 6 for accommodating the temperature sensor 2. In another optional embodiment of the present invention, a first recess can be provided on one end face of the body section 101, and a second recess can be provided on one end face of the lip section 102. When the end face of the body section 101 and the end face of the lip section 102 are in a docking state, the first recess and the second recess cooperate to form the above-mentioned positioning groove 6 for accommodating the temperature sensor 2.

[0065] The present invention divides the sealing body 1 into a body section 101 and a lip section 102, embeds the temperature sensor 2 into the provided positioning groove 6, and casts and seals the positioning groove 6 with a sealing filler, thereby achieving precise positioning and installation of the temperature sensor 2, with a simple installation structure and convenient operation.

[0066] Furthermore, a sealing filler is provided in the gap between the temperature sensor 2 and the positioning groove 6. The sealing filler is formed by pouring polyurethane liquid in the gap between the temperature sensor 2 and the positioning groove 6 and curing it.

[0067] In the present invention, the sealing body 1 is made of polyurethane material to ensure good sealing performance.

[0068] In an optional embodiment of the present invention, the seal body 1 is an annular structure arranged along the outer circumference of the driving shaft of the main drive of the shield machine, and there are multiple temperature sensors 2. The multiple temperature sensors 2 are arranged at intervals along the circumference of the seal body 1, so that the temperature values ​​at different lip positions of the seal body 1 in the circumferential direction can be respectively measured by the temperature sensors 2 at different positions.

[0069] In an optional embodiment of the present invention, Figure 1 As shown, the shield machine main drive sealing structure also includes a data acquisition device 3 and a display device 4. The temperature sensor 2 is connected to the data receiving end of the data acquisition device 3 through a data transmission line 5, and the data output end of the data acquisition device 3 is connected to the data receiving end of the display device 4 through the data transmission line 5. The data acquisition device 3 is used to receive the data (the collected temperature value) sent by the temperature sensor 2, and store and display the data through the display device 4. Among them, the data acquisition device 3 can use but is not limited to a microcontroller, and can also use other data receiving and processing components, which are not specifically limited here.

[0070] The characteristics and advantages of the shield machine main drive sealing structure of the present invention are:

[0071] 1. The shield machine main drive sealing structure has a temperature sensor 2 buried in the sealing body 1 and near the lip. The temperature sensor 2 can collect the temperature value at the lip position or near the lip position of the sealing body 1, so as to monitor the temperature change at the lip position or near the lip position of the sealing body 1 of the shield machine main drive, with higher measurement accuracy and more reliable measurement.

[0072] 2. The main drive sealing structure of the shield machine sets the lip position of the sealing body 1 in sections, and a positioning groove 6 is opened on its end face. After the temperature sensor 2 is set in the positioning groove 6, polyurethane is poured and sealed, which can realize the precise positioning and installation of the temperature sensor 2, and the installation structure is simple and easy to operate.

[0073] Implementation Method 2

[0074] like Figure 4 As shown, the present invention provides a method for manufacturing a main drive sealing structure of a shield machine, and the method for manufacturing a main drive sealing structure of a shield machine is used to manufacture the main drive sealing structure of the shield machine, and the manufacturing method comprises the following steps:

[0075] Step S1': manufacturing the seal body 1 in sections, wherein the seal body 1 at least comprises a body section 101 and a lip section 102, and the body section 101 and the lip section 102 respectively have matching end surfaces;

[0076] Step S2': positioning and slotting on the end surface of the body section 101, or on the end surface of the lip section 102, or on the end surface of the body section 101 and the end surface of the lip section 102 respectively;

[0077] Step S3': placing the temperature sensor 2 at the slotted position and temporarily fixing it, and leading the data transmission line 5 connected to the temperature sensor 2 to the outside of the sealing body 1;

[0078] Step S4': aligning the end surface of the body segment 101 with the end surface of the lip segment 102, and leaving a gap between them;

[0079] Step S5': pouring a sealing connecting agent at the gap position to seal the end surface of the body section 101 and the end surface of the lip section 102;

[0080] Step S6': sealingly connecting the end surface of the body section 101 and the end surface of the lip section 102 at different positions along the circumference of the seal body 1 to form a complete circle of the seal body 1;

[0081] Step S7': According to the number of temperature sensors 2, the above steps S2' to S6' can be repeated to assemble different temperature sensors 2, and finally form a complete circle of sealing body 1, and connect the data transmission line 5 to the data acquisition device 3 and display device 4 located outside to realize the collection, analysis and display of the temperature at multiple circumferential positions of the sealing body 1.

[0082] In an optional embodiment of the present invention, step S1' comprises:

[0083] Step S11': mixing the polyurethane prepolymer with the chain extender;

[0084] Step S12': pouring the mixed liquid into at least the first mold and the second mold respectively;

[0085] Step S13': The first mold and the second mold are combined and vulcanized (under preset temperature and pressure conditions) to vulcanize the body section 101 and the lip section 102. The body section 101 and the lip section 102 respectively have cross-sections that can be matched and connected. The cross-sections are the end faces of the body section 101 and the lip section 102.

[0086] In an optional embodiment of the present invention, in step S2', positioning and slotting can be performed only on the end face of the body section 101, and the slotting position forms the above-mentioned positioning groove 6; positioning and slotting can also be performed only on the end face of the lip section 102, and the slotting position forms the above-mentioned positioning groove 6; of course, positioning and slotting can also be performed on the end face of the body section 101 and the end face of the lip section 102 respectively, and the two slotting positions on the body section 101 and the lip section 102 are butt-jointed to form the above-mentioned positioning groove 6. Among them, the size of the slot can be set according to the size of the temperature sensor 2 and the size of the data transmission line 5, and the position of the slot can be accurately positioned according to the layout position of the temperature sensor 2 and the line layout position of the data transmission line 5. The slotting can be performed manually with a tool or by laser cutting, and the shape of the slot is kept consistent with the temperature sensor 2 and the data transmission line 5 as much as possible.

[0087] Furthermore, the inner contour of the slotted position is larger than the outer contour of the temperature sensor 2, so that the temperature sensor 2 is completely placed in the slotted position. Preferably, the inner contour of the slotted position is larger than the outer contour of the temperature sensor 2 (i.e., the gap width between the inner contour of the slotted position and the outer contour of the temperature sensor 2) by 0.5 mm to 1.5 mm. Preferably, the inner contour of the slotted position is larger than the outer contour of the temperature sensor 2 by 1 mm.

[0088] Furthermore, the depth of the positioning groove 6 formed after the slotting must ensure that the temperature sensor 2 can be completely accommodated in the positioning groove 6. The inner wall of the slotted position (i.e., the inner wall of the positioning groove 6) is roughened so that the inner wall of the slotted position has a preset roughness. By processing the size of the positioning groove 6 and the roughness of the inner wall, in the subsequent sealing and pouring process, it is possible to maintain a small amount of glue and polyurethane liquid filling, and ensure that the temperature sensor 2 is stably fixed, and the position of the temperature sensor 2 in the positioning groove 6 will not move, and the position is kept accurate.

[0089] In an optional embodiment of the present invention, step S3' comprises:

[0090] The step of placing the temperature sensor 2 at the slotted position and temporarily fixing it comprises:

[0091] Step S31': placing the end surface of the body segment 101 or the end surface of the lip segment 102 with the slotted position upward and keeping it horizontal;

[0092] Step S32': applying glue to the bottom of the slotted position;

[0093] Step S33 ′: placing the temperature sensor 2 in the slotted position, with the bottom of the temperature sensor 2 in contact with the glue.

[0094] Specifically, the lip section 102 can be laid flat with the end surface of one side of the slot facing upward, and a thin layer of glue (about 0.5 mm thick) of uniform thickness is first applied to the bottom center of the slot position. Before the glue is cured, the temperature sensor 2 is placed in the slot position, and the temperature sensor 2 is adjusted to the center using a convenient clamping tool such as tweezers, so that the bottom of the temperature sensor 2 can be in contact with the glue, and a uniform gap is reserved on both sides. After the glue is cured, the position of the temperature sensor 2 can be kept fixed, which plays a role in temporary positioning. In the above process, the amount of glue used must be strictly controlled to prevent the glue from completely wrapping the temperature sensor 2. In this way, the heat at the lip position needs to be transferred through two media, polyurethane and cured glue, to reach the temperature sensor 2, rather than a single uniform polyurethane medium. Due to the different thermal conductivity coefficients of different media, the temperature value at the temperature sensor 2 position is uneven with the temperature gradient of other parts, which will affect the accuracy of temperature detection. The data transmission line 5 is fixed in the same way, and the other end of the data transmission line 5 extends to the outside of the seal body 1.

[0095] In an optional embodiment of the present invention, in step S4', the end face of the body section 101 is aligned with the end face of the lip section 102, and a gap is reserved between the two. The gap between the end face of the body section 101 and the end face of the lip section 102 is 5mm to 15mm. Preferably, the gap between the end face of the body section 101 and the end face of the lip section 102 is 10mm. Ensure that the end face of the body section 101 and the end face of the lip section 102 remain parallel. If the gap between the two is too large, the centering effect is poor and misalignment is easy to occur. If the gap between the two is too small, the connection strength of the butt joint will be affected.

[0096] In an optional embodiment of the present invention, step S5' comprises:

[0097] Step S51': pouring a sealing connecting agent (the sealing connecting agent forms the above-mentioned sealing filling member after solidification) from the gap position until the sealing connecting agent fills the gap between the slot position and the temperature sensor 2 and the gap between the end surface of the body section 101 and the end surface of the lip section 102, wherein the sealing connecting agent includes polyurethane liquid;

[0098] Step S52': leaving it for a preset time until the poured polyurethane liquid solidifies.

[0099] The sealing structure formed by the manufacturing method of the shield machine main drive sealing structure of the present invention can accurately embed the temperature sensor 2 into the sealing body 1 and near the lip. As a result, the temperature value of the lip or near the lip of the sealing body 1 can be detected in real time and directly, and the collected actual temperature value is combined with the overall temperature gradient change of the sealing body 1 to obtain the actual temperature value of any position on the sealing body 1. Compared with the existing indirect measurement method, the present invention has the characteristics of more accurate, more intuitive, more reliable and more comprehensive temperature measurement values, and the sealing structure manufactured by this method has the advantages of simple processing, low cost and reliable performance; in terms of use, there is no need to modify other components of the original sealing system of the shield machine, and it has the advantages of strong adaptability, easy installation and simple operation.

[0100] Implementation Method 3

[0101] like Figure 5 As shown, the present invention provides a temperature monitoring method for a main drive sealing structure of a shield machine, and the temperature monitoring method for the main drive sealing structure of a shield machine is used to monitor the temperature at any position on the above-mentioned sealing body 1. The temperature monitoring method includes the following steps:

[0102] Step S1”: obtaining the temperature change gradient at different positions of the seal body 1;

[0103] Wherein, step S1" comprises:

[0104] Step S11": using simulation analysis or experimental testing to obtain the heat conduction law of the sealing body 1 made of polyurethane material;

[0105] The simulation analysis or experimental test method may adopt the existing method, and the specific steps are not limited here.

[0106] Step S12 ″: according to the heat conduction law of the seal body 1 , the temperature change gradient at different positions of the seal body 1 is obtained.

[0107] Step S2”: obtaining the temperature difference between any position of the seal body 1 and the temperature collected by the temperature sensor 2 on the seal body 1 according to the temperature change gradient;

[0108] Step S3”: collecting the actual temperature value at or near the lip of the seal body 1 through the temperature sensor 2;

[0109] Step S4 ”: obtaining the actual temperature value of any position of the sealing body 1 according to the temperature difference and the actual temperature value collected by the temperature sensor 2 .

[0110] Furthermore, after step S4", the actual average temperature value, the actual maximum temperature value and the actual minimum temperature value of the seal body 1 can be obtained according to the actual temperature value at any position of the seal body 1. Specifically, since the temperature change gradient at different positions of the seal body 1 is known, the position with the highest temperature in the temperature change gradient can be found, so that the temperature difference between the position with the highest temperature and the temperature collected by the temperature sensor 2 can be obtained, and the actual maximum temperature value on the seal body 1 can be obtained according to the temperature difference and the actual temperature value collected by the temperature sensor 2; similarly, the actual minimum temperature value on the seal body 1 can be obtained. Furthermore, the same method is used to obtain as many actual temperature values ​​at different positions on the seal body 1 as possible, and the average of the actual temperature values ​​at different positions on the seal body 1 is the actual average temperature value of the seal body 1.

[0111] Specifically, when the sealing structure of the present invention is working, as the lip position of the sealing body 1 continuously rubs against the contact surface of the driving shaft of the main drive of the shield machine, the temperature of the lip position continuously changes, and the temperature sensor 2 collects the real-time changing temperature value, and transmits the collected temperature value to the data acquisition device 3 through the data transmission line 5. The data acquisition device 3 stores, processes and analyzes the data, eliminates the noise signal therein, obtains accurate temperature data, and then transmits the temperature data to the display device 4 through the data transmission line 5 for display.

[0112] In order to further accurately display the temperature at any position on the sealing body 1, the temperature conduction law of the sealing body 1 made of polyurethane material can be obtained through simulation analysis or experimental testing, and the temperature gradient at different positions on the sealing body 1 can be obtained, and then the temperature difference between a certain position on the sealing body 1 and the position where the temperature sensor 2 is located can be obtained, so that the actual temperature value collected by the temperature sensor 2 and the temperature difference can be accurately calculated to obtain the actual temperature value at any position on the sealing body 1, and the actual temperature value at any position can be displayed in the display interface of the display device 4.

[0113] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A shield machine main drive sealing structure, characterized in that: The shield machine main drive sealing structure comprises: A sealing body (1) for sealing a main drive of a shield machine, the sealing body (1) having a lip which is in sealing contact with a drive shaft of the main drive of the shield machine in an assembled state; At least one temperature sensor (2), the temperature sensor (2) being embedded in the sealing body (1) and close to the lip, the temperature sensor (2) being used to collect a temperature value at or near the lip.

2. The shield machine main drive sealing structure according to claim 1, characterized in that: A positioning groove (6) is provided in the sealing body (1) and near the lip, the temperature sensor (2) is arranged in the positioning groove (6), the temperature sensor (2) is connected to a data transmission line (5), and the data transmission line (5) extends to the outside of the sealing body (1).

3. The shield machine main drive sealing structure according to claim 2, characterized in that: The sealing body (1) comprises a body section (101) and a lip section (102); a first recess is provided on one end surface of the body section (101), and / or a second recess is provided on one end surface of the lip section (102); when the end surface of the body section (101) and the end surface of the lip section (102) are in contact with each other, the first recess or the second recess or the first recess and the second recess cooperate to form the positioning groove (6); A sealing filler is provided at the gap between the temperature sensor (2) and the positioning groove (6).

4. The shield machine main drive sealing structure according to claim 3, characterized in that: The sealing filler is formed by pouring and curing polyurethane liquid at the gap between the temperature sensor (2) and the positioning groove (6).

5. The shield machine main drive sealing structure according to claim 1, characterized in that: The sealing element body (1) is made of polyurethane material.

6. The shield machine main drive sealing structure according to any one of claims 1 to 5, characterized in that: The seal body (1) is an annular structure arranged along the outer circumference of the driving shaft of the main drive of the shield machine. The number of the temperature sensors (2) is multiple, and the multiple temperature sensors (2) are arranged at intervals along the circumference of the seal body (1).

7. The shield machine main drive sealing structure according to any one of claims 2 to 5, characterized in that: The shield machine main drive sealing structure also includes a data acquisition device (3) and a display device (4); the temperature sensor (2) is connected to a data receiving end of the data acquisition device (3) via the data transmission line (5); and the data output end of the data acquisition device (3) is connected to a data receiving end of the display device (4) via the data transmission line (5).

8. A method for manufacturing a main drive sealing structure of a shield machine, characterized in that: The manufacturing method of the shield machine main drive sealing structure is used to manufacture the shield machine main drive sealing structure according to any one of claims 3 to 7, and the manufacturing method comprises the following steps: The sealing body (1) is manufactured in sections, wherein the sealing body (1) comprises at least a body section (101) and a lip section (102), and the body section (101) and the lip section (102) respectively have matching end surfaces; Positioning and grooving on the end surface of the body section (101), or on the end surface of the lip section (102), or respectively on the end surface of the body section (101) and the end surface of the lip section (102); Placing a temperature sensor (2) at the slotted position and temporarily fixing it, and leading a data transmission line (5) connected to the temperature sensor (2) to the outside of the sealing body (1); Aligning the end surface of the body section (101) with the end surface of the lip section (102), and leaving a gap between the two; Pouring a sealing connecting agent at the gap position to seal the end surface of the body section (101) and the end surface of the lip section (102); sealingly connecting the end surface of the body section (101) and the end surface of the lip section (102) at different positions along the circumference of the seal body (1) to form a complete circle of the seal body (1); The transmission line (5) is connected to an external data acquisition device (3) and a display device (4).

9. The method for manufacturing the main drive sealing structure of a shield machine according to claim 8, characterized in that: The segmented manufacturing of the sealing body (1) comprises: mixing a polyurethane prepolymer with a chain extender; pouring the mixed liquid into at least a first mold and a second mold respectively; The body segment (101) and the lip segment (102) are vulcanized and molded in the first mold and the second mold respectively.

10. The method for manufacturing the main drive sealing structure of a shield machine according to claim 8, characterized in that: The inner contour of the slotted position is larger than the outer contour of the temperature sensor 2 , so that the temperature sensor 2 is completely placed in the slotted position.

11. The method for manufacturing the main drive sealing structure of a shield machine according to claim 10, characterized in that: The inner wall of the groove position is roughened so that the inner wall of the groove position has a preset roughness.

12. The method for manufacturing the main drive sealing structure of a shield machine according to claim 11, characterized in that: Placing the temperature sensor (2) at the slotted position and temporarily fixing it comprises: Place the end surface of the body section (101) or the end surface of the lip section (102) having the slotted position upward and keep it horizontal; Applying glue to the bottom of the slotted position; The temperature sensor (2) is placed in the slotted position, and the bottom of the temperature sensor (2) is in contact with the glue.

13. The method for manufacturing the main drive sealing structure of a shield machine according to claim 12, characterized in that: The end face of the main body section (101) and the end face of the lip section (102) are aligned and a gap is reserved between the two. The gap between the end face of the main body section (101) and the end face of the lip section (102) is 5 mm to 15 mm.

14. The method for manufacturing the main drive sealing structure of a shield machine according to claim 13, characterized in that: The step of pouring a sealing connecting agent at the gap position to seal the end surface of the body section (101) and the end surface of the lip section (102) comprises: pouring a sealing connecting agent from the gap position until the sealing connecting agent fills the gap between the slot position and the temperature sensor (2) and the gap between the end surface of the body section (101) and the end surface of the lip section (102), wherein the sealing connecting agent comprises polyurethane liquid; The poured polyurethane liquid is left to stand for a preset time until solidification.

15. A temperature monitoring method for a main drive sealing structure of a shield machine, characterized in that: The temperature monitoring method of the main drive sealing structure of the shield machine is used to monitor the temperature of any position on the sealing body (1) according to any one of claims 1 to 7, and the temperature monitoring method comprises the following steps: Obtaining temperature gradients at different positions of the seal body (1); According to the temperature change gradient, a temperature difference between any position of the sealing body (1) and the position of the temperature sensor (2) on the sealing body (1) is obtained; The actual temperature value of the upper lip position of the sealing body (1) or the position close to the lip position is collected by the temperature sensor (2); The actual temperature value of any position of the sealing body (1) is obtained based on the temperature difference and the actual temperature value collected by the temperature sensor (2).

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