Detection test equipment for repairing quality and sealing performance of main driving runway of shield tunneling machine

Abstract

The invention relates to shield tunneling machine main drive runway repair quality and sealing performance detection test equipment. A pressure maintaining sealing element is filled in a contact part of a runway body and a base; the first pressure sensor is arranged between the pressure maintaining sealing piece and the runway body; the sliding block is fixed below the sliding support, the sliding rail is fixed at the upper end of the base, and the sliding rail is connected with the sliding block; the upper portion of the sealing base penetrates through the base and then is connected with the sliding support. The runway body, the base, the sliding sealing element, the sealing base and the test sealing element jointly form a closed cavity; the contact friction between the runway body and the test sealing element under a specified working condition is simulated through the reciprocating motion of the test sealing element, and the clamping pressure of the base and the runway bracket on the runway body is detected through the first pressure sensor. And the PLC processor performs logical operation on the obtained pressure signal and temperature signal. According to the invention, under the condition of simulating the actual working condition of the shield tunneling machine, the quality performance of the shield remanufacturing and repairing runway can be detected and the effective sealing time of the domestic runway can be verified.

Description

Technical Field

[0001] The invention belongs to the technical field of shield machine testing, and in particular relates to a shield machine main drive runway repair quality and sealing performance detection test equipment. Background Art

[0002] At present, during the tunneling process of the shield machine, due to the long-term friction between the main bearing seal lip and the seal slideway, and the infiltration of mud and water in the outermost seal during the pressure maintenance process, it is easy to cause wear on the seal runway and the seal contact position. As the degree of wear deepens, it will directly affect the sealing performance, causing more mud and sand to enter the main drive lubrication system and damage the main drive system. Therefore, repairing the outer seal runway is a key issue in shield remanufacturing, and its repair quality directly affects the construction and tunneling of the equipment. In addition, the wear resistance of the runway seal is also a key factor in ensuring effective operation time.

[0003] At present, there are two main methods for repairing the main drive runway of the shield machine: manual surfacing and laser cladding. The manual surfacing process is relatively mature, while laser cladding technology, as a new technology that has only appeared in recent years, lacks test data on the wear resistance of additive repair materials. Conventional spectral detection / hardness detection devices can only compare the stiffness characteristics of the original material and the additive material, and lack verification of the later repair quality and wear resistance. The existing repair quality inspection only has physical performance tests, no dynamic experimental tooling, and no reasonable basis for runway performance evaluation. Therefore, it is difficult to conduct comprehensive acceptance tests on the repair quality before use.

[0004] In addition, the materials and shapes of runway seals are different, such as lip seals and finger seals. In consideration of localization and cost reduction, the use of domestic seals is gradually being promoted in the shield industry. However, there is currently a lack of effective means of testing the sealing performance under real working conditions, and insufficient test data on the effective time and durability of the seal. Therefore, it is necessary to develop a technical solution for testing the repair quality and sealing performance of the main drive runway of the shield machine. Summary of the invention

[0005] To this end, the present invention provides a shield machine main drive runway repair quality and sealing performance detection test equipment, which can detect the quality performance of the shield remanufacturing and repair runway and verify the effective time of domestic runway sealing under simulated shield machine actual working conditions, thereby solving the problem of lack of test data for dynamic judgment of runway repair quality and runway sealing usability.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present invention provides the following technical solutions: a shield machine main drive runway repair quality and sealing performance detection test equipment, including a runway clamping mechanism, a reciprocating mechanism and a test seal; The track clamping mechanism comprises a track body, a base, a track bracket, a clamping bolt, a pressure-maintaining seal and a first pressure sensor; the track body is located between the base and the track bracket, and the clamping bolt is connected between the base and the edge of the track bracket; the pressure-maintaining seal is filled in the contact part between the track body and the base; the first pressure sensor is arranged between the pressure-maintaining seal and the track body; The reciprocating mechanism comprises an eccentric gear, a driving rack, a sliding support, a slider, a slide rail, a sliding seal and a sealing base; the driving rack is fixed to the upper end of the sliding support, and the eccentric gear and the driving rack are meshed; the slider is fixed below the sliding support, the slide rail is fixed to the upper end of the base, and the slide rail is connected to the slider; the sliding seal is arranged between the base and the sealing base, and the upper part of the sealing base passes through the base and is connected to the sliding support; The test seal is connected below the sealing base, and the runway body, the base, the sliding seal, the sealing base, and the test seal together constitute a closed cavity; the reciprocating motion of the test seal simulates the contact friction between the runway body and the test seal under specified working conditions, and the first pressure sensor detects the clamping pressure of the base and the runway bracket on the runway body.

[0007] As a preferred solution for the shield machine main drive runway repair quality and sealing performance detection test equipment, the edge of the runway body is located on the inner side of the pressure-maintaining seal.

[0008] As a preferred solution for the shield machine main drive runway repair quality and sealing performance detection test equipment, the clamping bolt is adjusted to change the gap between the base and the runway bracket, and the clamping pressure of the runway body is adjusted by adjusting the gap between the base and the runway bracket; The pressure of the test seal on the runway body is adjusted by adjusting the gap between the base and the runway bracket.

[0009] As a preferred solution for the shield machine main drive runway repair quality and sealing performance detection test equipment, the reciprocating motion mechanism also includes a drive motor and a rotary encoder, and the eccentric gear is connected to the rotating shaft of the drive motor; The driving motor drives the sliding support to reciprocate through the eccentric gear and the driving rack, and the reciprocating motion of the sliding support drives the test seal to be closely attached to the runway body and maintain a constant pressure; The rotary encoder is connected to the power shaft of the driving motor, and the rotary encoder is used to measure the running time and the test distance.

[0010] As a preferred solution for the shield machine main drive runway repair quality and sealing performance detection test equipment, the test seal divides the closed cavity into a first sub-cavity and a second sub-cavity; A first grease injection port is provided on one side of the base, and a second grease injection port is provided on the other side of the base; the first grease injection port is connected to the first sub-cavity; and the second grease injection port is connected to the second sub-cavity.

[0011] As a preferred solution for the shield machine main drive runway repair quality and sealing performance detection test equipment, a mud and water injection port is provided on one side of the base, and the mud and water injection port is connected to the first sub-cavity; The other side of the base is connected to a pressure relief valve, and the pressure relief valve is connected to the second sub-chamber.

[0012] As a preferred solution for the shield machine main drive runway repair quality and sealing performance detection test equipment, a second pressure sensor is provided on one side of the upper end of the base, and a third pressure sensor is provided on the other side of the upper end of the base; The second pressure sensor is used to detect the grease pressure inside the first sub-cavity; the third pressure sensor is used to detect the grease pressure inside the second sub-cavity.

[0013] As a preferred solution for the shield machine main drive runway repair quality and sealing performance detection test equipment, a temperature sensor is also provided on one side of the upper end of the base, and the temperature sensor is used to detect the grease temperature inside the first sub-cavity.

[0014] As a preferred solution for the shield machine main drive runway repair quality and sealing performance detection test equipment, it also includes a control box and a host computer, the control box is also provided with a PLC processor, the first pressure sensor, the second pressure sensor, the third pressure sensor, and the temperature sensor are all electrically connected to the PLC processor; the PLC processor is used to perform logical operations on the acquired pressure signals and temperature signals; The host computer is installed on the control box, and the host computer is used to display the pressure and temperature data of the test process; The interface of the host computer includes a main interface, a data history interface and a curve chart; The main interface is used to set and display the test object, test speed, test time, mud water content, grease type, grease temperature, and grease pressure; The data history interface is used to record parameters within a specified time period; The curve graph is used to reflect the change trend of the specified parameter.

[0015] As a preferred solution for the shield machine main drive runway repair quality and sealing performance detection test equipment, the first grease injection port and the second grease injection port are connected to an electric grease pump through a configured delivery pipeline, and the electric grease pump is connected to an HBW grease box and an EP2 grease box through a delivery pipeline. The HBW grease box and the EP2 grease box are used to simulate the actual working conditions of the specified type of runway seal.

[0016] The beneficial effects of the present invention are as follows: It can well simulate the actual working conditions of the shield machine runway and meet the requirements of grease lubrication and pressure maintenance under dynamic conditions; by setting the clamping pressure, the contact pressure between the test seal and the runway is continuously adjusted to detect the wear resistance of the runway under different pressure conditions; by setting the speed of the drive motor and adjusting the frequency of the reciprocating swing device, the quality test of the runway wear can be completed in a shorter time; real-time monitoring and recording of data, and the use of the upper computer interface display to achieve visual intelligent control; Dynamic tests of different types of runway seals can be performed to meet the operation of finger seals, lip seals, etc. under different working conditions; by setting the pressure in the cavity, the situation of imbalance between the cutter head soil bin or mud water pressure and the inner grease during excavation can be simulated; by selecting EP2 grease or HBW grease, the lubrication or pressure-maintaining environment of the runway seal can be simulated; by setting the grease temperature, the influence of grease temperature on seal failure can be tested; by setting the mud water injection port, the situation of mud water entering the runway seal cavity can be simulated; It can simulate various situations under actual working conditions and dynamically test the performance of the main drive runway and runway seal of the shield machine; it provides feasibility dynamic detection support for runway repair methods including laser cladding, and provides reference for the localization and performance improvement of runway sealing through experimental data support. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0019] Figure 1 It is a schematic diagram of the structure of a test equipment for detecting the repair quality and sealing performance of the main drive runway of a shield machine provided in an embodiment of the present invention; Figure 2 It is a schematic diagram of the base structure of the shield machine main drive runway repair quality and sealing performance detection test equipment provided in an embodiment of the present invention; Figure 3 A schematic diagram of grease delivery for a shield machine main drive runway repair quality and sealing performance testing equipment provided in an embodiment of the present invention; Figure 4 It is a schematic diagram of a control box of a shield machine main drive runway repair quality and sealing performance detection test equipment provided in an embodiment of the present invention; Figure 5 It is a schematic diagram of the shield machine main drive runway repair quality and sealing performance detection test process provided in an embodiment of the present invention.

[0020] In the figure: 1. track clamping mechanism; 2. reciprocating motion mechanism; 3. test seal; 4. track body; 5. base; 6. track bracket; 7. clamping bolt; 8. pressure-maintaining seal; 9. first pressure sensor; 10. eccentric gear; 11. drive rack; 12. sliding support; 13. slider; 14. slide rail; 15. sliding seal; 16. sealing base; 17. driving motor; 18. rotary encoder; 19. first sub-chamber; 20. second sub-chamber; 21. first grease injection port; 22. second grease injection port; 23. mud and water injection port; 24. pressure relief valve; 25. second pressure sensor; 26. third pressure sensor; 27. temperature sensor; 28. control box; 29. ​​host computer; 30. PLC processor; 31. electric grease pump; 32. HBW grease box; 33. EP2 grease box. DETAILED DESCRIPTION

[0021] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1 and Figure 2 , the embodiment of the present invention provides a shield machine main drive runway repair quality and sealing performance detection test equipment, including a runway clamping mechanism 1, a reciprocating motion mechanism 2 and a test seal 3; The track clamping mechanism 1 includes a track body 4, a base 5, a track bracket 6, a clamping bolt 7, a pressure-maintaining seal 8 and a first pressure sensor 9; the track body 4 is located between the base 5 and the track bracket 6, and the clamping bolt 7 is connected between the base 5 and the edge of the track bracket 6; the pressure-maintaining seal 8 is filled in the contact part between the track body 4 and the base 5; the first pressure sensor 9 is arranged between the pressure-maintaining seal 8 and the track body 4; The reciprocating mechanism 2 includes an eccentric gear 10, a driving rack 11, a sliding support 12, a slider 13, a slide rail 14, a sliding seal 15 and a sealing base 16; the driving rack 11 is fixed to the upper end of the sliding support 12, and the eccentric gear 10 and the driving rack 11 are meshed; the slider 13 is fixed to the lower side of the sliding support 12, the slide rail 14 is fixed to the upper end of the base 5, and the slide rail 14 and the slider 13 are connected; the sliding seal 15 is arranged between the base 5 and the sealing base 16, and the upper part of the sealing base 16 passes through the base 5 and is connected to the sliding support 12; Among them, the test seal 3 is connected to the bottom of the sealing base 16, and the runway body 4, the base 5, the sliding seal 15, the sealing base 16, and the test seal 3 together constitute a closed cavity; the reciprocating motion of the test seal 3 simulates the contact friction between the runway body 4 and the test seal 3 under specified working conditions, and the clamping pressure of the base 5 and the runway bracket 6 on the runway body 4 is detected by the first pressure sensor 9.

[0023] In this embodiment, the edge of the runway body 4 is located on the inner side of the pressure-maintaining seal 8; the clamping bolt 7 is adjusted to change the gap between the base 5 and the runway bracket 6, and the clamping pressure of the runway body 4 is adjusted by adjusting the gap between the base 5 and the runway bracket 6; the pressure of the test seal 3 on the runway body is adjusted by adjusting the gap between the base 5 and the runway bracket 6.

[0024] Specifically, the pressure-maintaining seal 8 can maintain the pressure of the cavity between the base 5 and the track body 4, and can adjust the contact pressure of the track body 4 under test. The pressure-maintaining seal 8 is fixed below the base 5, so that a closed cavity is formed between the track body 4 and the base 5. Since the pressure-maintaining seal 8 is elastic, the pressure of the test seal 3 on the track body 4 can be adjusted by adjusting the clamping bolt 7. The first pressure sensor 9 is installed below the pressure-maintaining seal 8, and can detect the clamping pressure on the track body 4.

[0025] In this embodiment, the reciprocating motion mechanism 2 also includes a driving motor 17 and a rotary encoder 18. The eccentric gear 10 is connected to the rotating shaft of the driving motor 17. The driving motor 17 drives the sliding support 12 to reciprocate through the eccentric gear 10 and the driving rack 11. The reciprocating motion of the sliding support 12 drives the test seal 3 to be close to the runway body 4 and maintain constant pressure. The rotary encoder 18 is connected to the power shaft of the driving motor 17, and the rotary encoder 18 is used to measure the running time and test distance.

[0026] Specifically, the eccentric gear 10 is mounted on the rotating shaft of the driving motor 17, the driving rack 11 is meshed with the eccentric gear 10, the driving rack 11 is mounted on the sliding support 12, and the sliders 13 are mounted on both sides below the sliding support 12, and the sliders 13 are mounted on the slide rails 14. The sliding seal 15 is installed between the base 5 and the sealing base 16. When the driving motor 17 rotates, it can drive the reciprocating motion mechanism 2 to swing back and forth. Since the test surface of the runway body 4 is not a plane, but a large arc, the test portion of the runway body 4 is a section of the arc and has an arc, the eccentric gear 10 can adjust the reciprocating motion mechanism 2 to move along the runway body 4 on a curved surface to ensure that during the swinging process, the test seal 3 is always close to the runway body 4 and maintains a constant pressure. The rotary encoder 18 is installed on the driving motor 17, which can measure and calculate the running time and test distance through the PLC processor 30.

[0027] See also Figure 1 , Figure 2 and Figure 3 In this embodiment, the test seal 3 divides the closed cavity into a first sub-cavity 19 and a second sub-cavity 20; a first grease injection port 21 is provided on one side of the base 5, and a second grease injection port 22 is provided on the other side of the base 5; the first grease injection port 21 is connected to the first sub-cavity 19; the second grease injection port 22 is connected to the second sub-cavity 20; the first grease injection port 21 and the second grease injection port 22 are connected to an electric grease pump 31 through a configured delivery pipeline, and the electric grease pump 31 is connected to a HBW grease box 32 and an EP2 grease box 33 through a delivery pipeline, and the HBW grease box 32 and the EP2 grease box 33 are used to simulate the actual working conditions of a specified type of runway seal.

[0028] Specifically, the test seal 3 is installed under the base 5 through the sealing base 16, and the contact friction between the test seal 3 and the runway body 4 is simulated by reciprocating motion during the actual working condition. The first grease injection port 21 and the second grease injection port 22 are opened on the left and right sides of the base 5, which are used to inject grease into the first sub-cavity 19 and the second sub-cavity 20 on both sides of the test seal 3. The grease pressure in the first sub-cavity 19 and the second sub-cavity 20 can be adjusted manually or automatically to ensure that the grease pressure in the cavity is balanced. Among them, the electric grease pump 31 injects grease into the first sub-cavity 19 and the second sub-cavity 20 formed by the base 5 and the runway body 4, which is used to lubricate and maintain pressure during the friction process between the test seal 3 and the runway body 4. Since the grease of the outer runway seal and the inner runway seal of the shield machine are different, HBW grease box 32 and EP2 grease box 33 are respectively set to simulate the actual working conditions of different types of runway seals.

[0029] See also Figure 2 In this embodiment, a muddy water injection port 23 is provided on one side of the base 5, and the muddy water injection port 23 is connected to the first sub-cavity 19; a pressure relief valve 24 is connected to the other side of the base 5, and the pressure relief valve 24 is connected to the second sub-cavity 20; a second pressure sensor 25 is provided on one side of the upper end of the base 5, and a third pressure sensor 26 is provided on the other side of the upper end of the base 5; the second pressure sensor 25 is used to detect the grease pressure inside the first sub-cavity 19; the third pressure sensor 26 is used to detect the grease pressure inside the second sub-cavity 20; a temperature sensor 27 is also provided on one side of the upper end of the base 5, and the temperature sensor 27 is used to detect the grease temperature inside the first sub-cavity 19.

[0030] Specifically, since muddy water may enter the outermost main drive runway seal of the shield machine under actual working conditions, a muddy water injection port 23 is provided on the base 5. The muddy water content setting can simulate the influence of muddy water on runway wear and effective sealing time under severe working conditions. That is, when the simulated working condition is the outermost runway seal, muddy water injection can be selected and the injection amount can be set.

[0031] The pressure relief valve 24 is installed on the base 5. When the pressure in the cavity is too high, the pressure relief valve 24 can be adjusted to reduce the pressure. Since the wear degree of the runway body 4 is also affected by the oil temperature and pressure in actual working conditions, a second pressure sensor 25 is installed on the base 5 to detect the grease pressure in the first sub-cavity 19, a third pressure sensor 26 is used to detect the grease pressure in the second sub-cavity 20, and a temperature sensor 27 is used to detect the grease temperature in the first sub-cavity 19. The tested pressure and temperature signals are transmitted to the PLC processor 30, and are fed back to the host computer 29 through logical operations.

[0032] See also Figure 4In this embodiment, a control box 28 and a host computer 29 are also included. A PLC processor 30 is also provided inside the control box 28. The first pressure sensor 9, the second pressure sensor 25, the third pressure sensor 26, and the temperature sensor 27 are all electrically connected to the PLC processor 30; the PLC processor 30 is used to perform logical operations on the acquired pressure signals and temperature signals; the host computer 29 is installed on the control box 28, and the host computer 29 is used to display the pressure and temperature data of the test process; the interface of the host computer 29 includes a main interface, a data history interface and a curve chart; the main interface is used to set and display the test object, test speed, test time, mud water content, grease type, grease temperature, and grease pressure; the data history interface is used to record the parameters within a specified time; the curve chart is used to reflect the change trend of the specified parameters.

[0033] Specifically, the electrical acquisition control system of the equipment includes the above-mentioned first pressure sensor 9, second pressure sensor 25, third pressure sensor 26, temperature sensor 27, control box 28 and host computer 29. The control box 28 contains the power supply and distribution electrical components and PLC processor 30 of the whole set of equipment. The host computer 29 is installed on the control box 28 for data display and to facilitate the control and operation of the test process. In order to simulate various test scenes and environments existing in actual working conditions and achieve good human-computer interaction, the interface of the host computer 29 is divided into three pages, namely the main interface, the data history interface and the curve chart. The main page can set and display the test object, test speed, test time, mud water content, grease type, grease temperature, grease pressure, etc.; the data history interface can record the parameters within 48 hours, which is convenient for operators to count the experimental data; the curve chart intuitively reflects the changing trend of the relevant parameters, and the operator can select any parameters and time period.

[0034] See also Figure 5 In the experimental process of the present invention, firstly, the test object is selected as a runway or a seal, and then the following simulation parameters are set, including test speed, test time, mud water content, grease type, grease temperature, grease pressure, etc. The specific steps are as follows: S1. The cutter head speed requirement can be simulated by testing the speed and time. After the test speed is set, the speed of the drive motor 17 can be adjusted to achieve the frequency of the reciprocating mechanism 2, so that the speed of the test seal 3 rubbing the runway body 4 can be controlled.

[0035] S2. The actual grease environment can be simulated by controlling parameters such as grease type, grease temperature, and grease pressure. The sensor transmits the tested oil temperature, oil pressure, and sealing pressure data to the PLC processor 30, and transmits them to the host computer 29 for display via Ethernet communication. When the grease temperature is higher than the set value, the control program will automatically start the cooling water circulation system to cool the oil, and the oil temperature will continue to reach the set value through PID adjustment. When the grease pressure in the cavity is lower than the set value, the electric grease pump 31 can be manually or automatically controlled to inject grease so that the oil pressure is increased to meet the set value. When the grease pressure in the cavity is higher than the set value, the pressure relief valve 24 can be opened to reduce the oil pressure to meet the set value.

[0036] S3. The mud and water content setting can simulate the influence of mud and water on the wear of the runway body 4 and the effective sealing time under severe working conditions. That is, when the simulated working condition is the outermost runway sealing, mud and water injection can be selected and the injection amount can be set.

[0037] S4, by collecting the data of the rotary encoder 18 and transmitting it to the PLC processor 30, the accurate test distance and effective duration are calculated, so as to obtain dynamic operation data to judge the performance of the runway and the seal In summary, the present invention includes a track clamping mechanism 1, a reciprocating mechanism 2 and a test seal 3; the track clamping mechanism 1 includes a track body 4, a base 5, a track bracket 6, a clamping bolt 7, a pressure-maintaining seal 8 and a first pressure sensor 9; the track body 4 is located between the base 5 and the track bracket 6, and the clamping bolt 7 is connected between the base 5 and the edge of the track bracket 6; the pressure-maintaining seal 8 is filled in the contact part between the track body 4 and the base 5; the first pressure sensor 9 is arranged between the pressure-maintaining seal 8 and the track body 4; the reciprocating mechanism 2 includes an eccentric gear 10, a driving rack 11, a sliding support 12, a slider 13, a slide rail 14, a sliding seal 15 and a sealing base 16; the driving rack 11 is fixed to the sliding support 12 At the upper end, the eccentric gear 10 and the driving rack 11 are meshed; the slider 13 is fixed at the bottom of the sliding support 12, the slide rail 14 is fixed at the upper end of the base 5, and the slide rail 14 and the slider 13 are connected; the sliding seal 15 is arranged between the base 5 and the sealing base 16, and the upper part of the sealing base 16 passes through the base 5 and is connected to the sliding support 12; the test seal 3 is connected to the bottom of the sealing base 16, and the runway body 4, the base 5, the sliding seal 15, the sealing base 16, and the test seal 3 together constitute a closed cavity; the reciprocating motion of the test seal 3 simulates the contact friction between the runway body 4 and the test seal 3 under the specified working conditions, and the clamping pressure of the base 5 and the runway bracket 6 on the runway body 4 is detected by the first pressure sensor 9. The present invention can well simulate the actual working condition of the shield machine runway, and meet the requirements of grease injection lubrication and pressure maintenance under dynamic conditions; by setting the clamping pressure, the contact pressure between the test seal and the runway is continuously adjusted to detect the wear resistance of the runway under different pressure conditions; by setting the speed of the drive motor 17 and adjusting the frequency of the reciprocating swing device, the quality test of the runway wear can be completed in a shorter time; real-time monitoring and recording of data, and visual intelligent control using the upper computer 29 interface display; the present invention can perform dynamic tests on different types of runway seals to meet the operations of finger seals, lip seals, etc. under different working conditions; by setting the pressure in the cavity, To simulate the imbalance between the cutter head soil bin or mud water pressure and the internal grease during the excavation process; by selecting EP2 grease or HBW grease, the lubrication or pressure-maintaining environment of the runway seal is simulated; by setting the grease temperature, the influence of the grease temperature on the seal failure is tested; by setting the mud water injection port 23, the situation of mud water entering the runway sealing cavity is simulated; the present invention can simulate various situations under actual working conditions and dynamically test the performance of the main drive runway and runway seal of the shield machine; it provides feasibility dynamic detection support for methods of repairing the runway including laser cladding, and provides reference for the localization and performance improvement of the runway seal through experimental data support.

[0038] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A shield machine main drive runway repair quality and sealing performance detection test equipment, characterized in that: It comprises a track clamping mechanism (1), a reciprocating motion mechanism (2) and a test seal (3); The track clamping mechanism (1) comprises a track body (4), a base (5), a track bracket (6), a clamping bolt (7), a pressure-maintaining seal (8) and a first pressure sensor (9); the track body (4) is located between the base (5) and the track bracket (6), and the clamping bolt (7) is connected between the base (5) and the edge of the track bracket (6); the pressure-maintaining seal (8) is filled in the contact portion between the track body (4) and the base (5); and the first pressure sensor (9) is arranged between the pressure-maintaining seal (8) and the track body (4); The reciprocating mechanism (2) comprises an eccentric gear (10), a driving rack (11), a sliding support (12), a slider (13), a slide rail (14), a sliding seal (15) and a sealing base (16); the driving rack (11) is fixed to the upper end of the sliding support (12), and the eccentric gear (10) and the driving rack (11) are meshed; the slider (13) is fixed below the sliding support (12), the slide rail (14) is fixed to the upper end of the base (5), and the slide rail (14) and the slider (13) are connected; the sliding seal (15) is arranged between the base (5) and the sealing base (16), and the upper part of the sealing base (16) passes through the base (5) and is connected to the sliding support (12); The test seal (3) is connected below the sealing base (16); the runway body (4), the base (5), the sliding seal (15), the sealing base (16), and the test seal (3) together form a closed cavity; the reciprocating motion of the test seal (3) simulates the contact friction between the runway body (4) and the test seal (3) under specified working conditions, and the clamping pressure of the base (5) and the runway bracket (6) on the runway body (4) is detected by the first pressure sensor (9).

2. The shield machine main drive runway repair quality and sealing performance detection test equipment according to claim 1 is characterized in that: The edge of the runway body (4) is located on the inner side of the pressure-maintaining seal (8).

3. The shield machine main drive runway repair quality and sealing performance detection test equipment according to claim 1 is characterized in that: The clamping bolt (7) is adjusted to change the gap between the base (5) and the runway bracket (6), and the clamping pressure of the runway body (4) is adjusted by adjusting the gap between the base (5) and the runway bracket (6); The pressure of the test seal (3) on the runway body is adjusted by adjusting the gap between the base (5) and the runway support (6).

4. The shield machine main drive runway repair quality and sealing performance detection test equipment according to claim 1 is characterized in that: The reciprocating motion mechanism (2) further comprises a driving motor (17) and a rotary encoder (18), and the eccentric gear (10) is connected to the rotating shaft of the driving motor (17); The driving motor (17) drives the sliding support (12) to reciprocate via the eccentric gear (10) and the driving rack (11), and the reciprocating motion of the sliding support (12) drives the test seal (3) to be in close contact with the runway body (4) and maintain a constant pressure; The rotary encoder (18) is connected to the power shaft of the drive motor (17), and the rotary encoder (18) is used to measure the running time and the test distance.

5. The shield machine main drive runway repair quality and sealing performance detection test equipment according to claim 1 is characterized in that: The test seal (3) divides the closed cavity into a first sub-cavity (19) and a second sub-cavity (20); A first grease injection port (21) is provided on one side of the base (5), and a second grease injection port (22) is provided on the other side of the base (5); the first grease injection port (21) is connected to the first sub-cavity (19); and the second grease injection port (22) is connected to the second sub-cavity (20).

6. A shield machine main drive runway repair quality and sealing performance detection test equipment according to claim 5, characterized in that: A muddy water injection port (23) is provided on one side of the base (5), and the muddy water injection port (23) is connected to the first sub-cavity (19); The other side of the base (5) is connected to a pressure relief valve (24), and the pressure relief valve (24) is in communication with the second sub-chamber (20).

7. The shield machine main drive runway repair quality and sealing performance testing equipment according to claim 6 is characterized in that: A second pressure sensor (25) is provided on one side of the upper end of the base (5), and a third pressure sensor (26) is provided on the other side of the upper end of the base (5); The second pressure sensor (25) is used to detect the grease pressure inside the first sub-cavity (19); and the third pressure sensor (26) is used to detect the grease pressure inside the second sub-cavity (20).

8. The shield machine main drive runway repair quality and sealing performance testing equipment according to claim 7 is characterized in that: A temperature sensor (27) is also provided on one side of the upper end of the base (5), and the temperature sensor (27) is used to detect the temperature of the grease inside the first sub-cavity (19).

9. The shield machine main drive runway repair quality and sealing performance testing equipment according to claim 8, characterized in that: It also includes a control box (28) and a host computer (29); a PLC processor (30) is also provided inside the control box (28); the first pressure sensor (9), the second pressure sensor (25), the third pressure sensor (26), and the temperature sensor (27) are all electrically connected to the PLC processor (30); the PLC processor (30) is used to perform logic operations on the acquired pressure signals and temperature signals; The host computer (29) is installed on the control box (28), and the host computer (29) is used to display the pressure and temperature data of the test process; The interface of the host computer (29) includes a main interface, a data history interface and a curve chart; The main interface is used to set and display the test object, test speed, test time, mud water content, grease type, grease temperature, and grease pressure; The data history interface is used to record parameters within a specified time period; The curve graph is used to reflect the change trend of the specified parameter.

10. The shield machine main drive runway repair quality and sealing performance detection test equipment according to claim 5, characterized in that: The first grease injection port (21) and the second grease injection port (22) are connected to an electric grease pump (31) via a configured delivery pipeline; the electric grease pump (31) is connected to an HBW grease tank (32) and an EP2 grease tank (33) via a delivery pipeline; the HBW grease tank (32) and the EP2 grease tank (33) are used to simulate actual working conditions of a specified type of runway seal.

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