Online detection of wear for automatically lubricated screw conveyor barrels and shield machines

Abstract

The application discloses an automatic lubricating screw conveyor cylinder capable of detecting wear online, which comprises a fixed section in a cylindrical shape, a wear detection probe, a signal transmission system, a main control computer and a foam system, the wear detection probe is installed on the cylinder wall on the lower side of the fixed section and is used for detecting the wear degree of the cylinder wall on the lower side of the fixed section, the signal transmission system is used for transmitting the detection data of the wear detection probe to the main control computer, the foam system is connected with the inside of the fixed section through a foam pipeline, and the main control computer controls the foam system to inject lubricating medium into the fixed section according to the wear degree. The wear condition of the cylinder can be directly understood, lubrication and repair treatment can be timely made, the foam system can quickly inject foam into the worn cylinder to improve the sludge, the lubrication is strengthened to reduce the risk of cylinder wear and tear, the safety of construction is ensured, and the degree of automation of the equipment and the ability of adapting to complex strata are greatly improved. The application further discloses a shield tunneling machine comprising the cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of shield equipment, in particular to an automatic lubrication screw conveyor cylinder capable of detecting wear in real time. BACKGROUND

[0002] The earth pressure balance shield machine is a safe and efficient tunnel construction equipment, which is widely used in the field of tunnel construction. During tunneling, the screw conveyor is used for discharging the spoil. The screw conveyor generally consists of a driving device, a screw shaft, a cylinder and a spoil discharge gate. Under normal circumstances, the driving device rotates the screw shaft blade to move the spoil in the cylinder, and the spoil falls into the belt conveyor through the tail spoil discharge gate, and is then transported to the spoil car for delivery out of the tunnel.

[0003] Because the spoil moves axially in the cylinder, especially the pebbles in hard rock strata, the inner wall of the cylinder is severely worn. Meanwhile, the screw shaft is only fixed at one end of the driving device, and the end close to the bottom of the soil bin is a cantilever structure. Due to the action of gravity, the screw shaft blade at this end sinks and contacts the inner wall of the cylinder, causing uneven wear. As the construction range and tunnel length continue to increase, and the geological conditions continue to deteriorate, the risk of cylinder wear is greatly increased. Once the cylinder is worn out in some parts, it must be stopped for treatment. According to actual wear experience, the closer to the soil bin, the more serious the wear, the smaller the treatment space and the greater the difficulty, which causes great safety hazards and unnecessary economic losses to the construction production.

[0004] Currently, there is no effective management method for online real-time monitoring of cylinder wear and early warning.

[0005] Therefore, how to provide an automatic lubrication screw conveyor cylinder capable of detecting wear in real time is a technical problem that needs to be solved by those skilled in the art. SUMMARY

[0006] The present application aims to provide an automatic lubrication screw conveyor cylinder capable of detecting wear in real time, which can obtain the wear degree in real time by setting a wear detection probe, set corresponding warning functions according to the wear degree, and make timely lubrication and repair treatment to ensure the safety of the equipment and prolong the service life. Another object of the present application is to provide a shield machine comprising the above-mentioned automatic lubrication screw conveyor cylinder capable of detecting wear in real time.

[0007] In order to solve the above technical problems, the application provides an automatic lubrication screw conveyor cylinder for online detection of abrasion, which comprises a fixed section in a cylindrical shape, further comprises an abrasion detection probe, a signal transmission system, a main control computer and a foam system, the abrasion detection probe is installed on the cylinder wall on the lower side of the fixed section and is used for detecting the abrasion degree of the cylinder wall on the lower side of the fixed section, the signal transmission system is used for transmitting the detection data of the abrasion detection probe to the main control computer, and the foam system is connected with the inside of the fixed section through a foam pipeline, and the main control computer controls the foam system to inject lubricating medium into the fixed section according to the abrasion degree.

[0008] Preferably, the abrasion detection probe comprises a resistance sensor, the resistance sensor penetrates the cylinder wall on the lower side of the fixed section, and the head of the resistance sensor is flush with the inner wall of the fixed section.

[0009] Preferably, the abrasion detection probe further comprises a mounting seat and a protective cover, the resistance sensor is bolted to the mounting seat, the mounting seat is welded to the outer wall of the fixed section, the protective cover covers the joint of the resistance sensor, and sealant is filled between the resistance sensor and the fixed section.

[0010] Preferably, the fixed section comprises a wear plate, a structural plate and a reinforcing plate which are sequentially sleeved from inside to outside, the resistance sensor sequentially penetrates the reinforcing plate, the structural plate and the wear plate, the head of the resistance sensor is flush with the inner wall of the wear plate, and the mounting seat is welded to the outer wall of the reinforcing plate.

[0011] Preferably, the abrasion detection probe comprises an electromagnetic ultrasonic probe, and the electromagnetic ultrasonic probe is attached to the outer wall of the cylinder wall on the lower side of the fixed section.

[0012] Preferably, the signal transmission system comprises a signal acquisition module, a transition box, a transmitting box and a signal receiver which are sequentially connected, the signal acquisition module is connected to the abrasion detection probe, and the signal receiver is connected to the main control computer.

[0013] Preferably, a foam hole seat for connecting the foam pipeline is installed on the cylinder wall of the fixed section.

[0014] Preferably, a plurality of foam hole seats are respectively arranged on the two sides of the fixed section in the horizontal direction, and at least two foam hole seats are arranged on each side.

[0015] Preferably, a plurality of abrasion detection probes are sequentially installed on the cylinder wall on the lower side of the fixed section in the circumferential direction.

[0016] The application provides a shield tunneling machine, which comprises the automatic lubrication screw conveyor cylinder for online detection of abrasion.

[0017] The application provides an automatic lubrication screw conveyor cylinder for online detection of abrasion, comprising a cylindrical fixed section, further comprising an abrasion detection probe, a signal transmission system, a master computer and a foam system, the abrasion detection probe is installed on the cylinder wall on the lower side of the fixed section and is used for detecting the abrasion degree of the cylinder wall on the lower side of the fixed section, the signal transmission system is used for transmitting the detection data of the abrasion detection probe to the master computer, the foam system is connected to the inside of the fixed section through a foam pipeline, and the master computer controls the foam system to inject lubricating medium into the fixed section according to the abrasion degree.

[0018] By setting the abrasion detection probe, the abrasion degree is obtained in real time, the measured signal is transmitted to the master computer and the specific value is displayed, the cylinder abrasion condition can be intuitively understood, the corresponding early warning function is set according to the abrasion degree, lubrication and repair processing are made in time, the foam system is quickly responded to inject foam into the cylinder with abrasion to improve the slag, the lubrication is strengthened to reduce the risk of cylinder breakage, the safety of construction is ensured, and the degree of automation of the equipment and the ability to adapt to complex strata are greatly improved.

[0019] The application also provides a shield machine comprising the automatic lubrication screw conveyor cylinder for online detection of abrasion, since the automatic lubrication screw conveyor cylinder for online detection of abrasion has the technical effects described above, the shield machine should also have the same technical effects, and will not be described in detail here. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A structure schematic view of one specific embodiment of the automatic lubrication screw conveyor cylinder for online detection of abrasion provided by the application;

[0021] Figure 2 A whole schematic view of one specific embodiment of the automatic lubrication screw conveyor cylinder for online detection of abrasion provided by the application;

[0022] Figure 3 A structure schematic view of one specific embodiment of the automatic lubrication screw conveyor cylinder for online detection of abrasion provided by the application; Figure 2 A sectional view along A-A direction of the automatic lubrication screw conveyor cylinder for online detection of abrasion provided by the application;

[0023] Figure 4 A local enlarged view of the abrasion detection probe in one specific embodiment of the automatic lubrication screw conveyor cylinder for online detection of abrasion provided by the application. DETAILED DESCRIPTION

[0024] The core of the application is to provide an automatic lubrication screw conveyor cylinder for online detection of abrasion, by setting the abrasion detection probe, the abrasion degree is obtained in real time, the corresponding early warning function is set according to the abrasion degree, lubrication and repair processing are made in time, the safety of the equipment is ensured, and the service life is prolonged. Another core of the application is to provide a shield machine comprising the automatic lubrication screw conveyor cylinder for online detection of abrasion.

[0025] In order to make the person skilled in the art better understand the present application, the present application is further described in detail below in combination with the drawings and specific embodiments.

[0026] Please refer to Figures 1 to 4 , Figure 1 The structural schematic diagram of one specific embodiment of the automatic lubricating screw conveyor cylinder provided by the present application for online detection of wear; Figure 2 The overall schematic diagram of one specific embodiment of the automatic lubricating screw conveyor cylinder provided by the present application for online detection of wear; Figure 3 The A-A sectional view of Figure 2 ; Figure 4 The local enlarged view of the wear detection probe in one specific embodiment of the automatic lubricating screw conveyor cylinder provided by the present application for online detection of wear.

[0027] The specific embodiment of the present application provides an automatic lubricating screw conveyor cylinder for online detection of wear, which is an axially extended cylindrical structure. The fixed section 1 is a part of the cylinder close to the bottom of the soil bin and prone to wear, and is also a cylindrical structure. The screw shaft located here is a cantilever structure. It also includes a wear detection probe 3, a signal transmission system, a host computer 9 and a foam system 10. Due to the action of gravity, the inner wall of the lower side of the cylinder wall of the fixed section 1 is the most easily worn part. Therefore, the wear detection probe 3 is installed on the lower side of the cylinder wall of the fixed section 1 to detect the wear degree of the lower side of the cylinder wall of the fixed section 1. The signal transmission system is used to transmit the detection data of the wear detection probe 3 to the host computer 9. The foam system 10 is connected to the inside of the fixed section 1 through the foam pipeline 11. The host computer 9 controls the foam system 10 to inject lubricating medium into the fixed section 1 according to the wear degree.

[0028] According to the data of the cylinder wear online monitoring obtained by the wear detection probe 3, different degree of early warning program is set on the platform system of the host computer 9, which can be divided into green early warning (cylinder wall thickness wear amount ≤ 30%), yellow early warning (cylinder wall thickness wear amount between 30%-60%), orange early warning (cylinder wall thickness wear amount between 60%-90%) and red early warning (cylinder wall thickness wear amount > 90%).

[0029] When the green early warning is processed, the foam system 10 can be started according to the remaining tunneling mileage and geological conditions, and the number of foam injection into the fixed section 1 and the flow rate can be reasonably controlled. When the yellow early warning is processed, all the foam injection into the fixed section 1 is started, and the flow rate is adjusted to the maximum. When the orange early warning is processed, on the basis of the yellow early warning processing, the pop-up window reminds to pay attention to the wear condition of the fixed section 1 at all times. When the red early warning is processed, the system alarms, and it is suggested to repair the worn area of the cylinder immediately, to strengthen the wear resistance, and to prevent the cylinder from being torn and the danger of gushing.

[0030] By setting the wear detection probe 3, the wear degree is obtained in real time, the measured signal is transmitted to the host computer 9 and the specific value is displayed, the wear of the cylinder can be directly understood, and timely lubrication and repair processing is made, the foam system 10 is quickly responded to inject foam into the worn cylinder to improve the sludge, to strengthen the lubrication and reduce the risk of cylinder wear, while ensuring the safety of construction, greatly improving the degree of automation of the equipment and the ability to adapt to complex strata.

[0031] In the automatic lubrication screw conveyor cylinder provided by the embodiment of the application, the wear detection probe 3 includes a resistance sensor 3-1, a through hole is arranged at a corresponding position of the cylinder wall below the fixed node 1, the resistance sensor 3-1 is installed in the through hole, the resistance sensor 3-1 penetrates the cylinder wall below the fixed node 1, the length of the resistance sensor 3-1 is greater than the overall thickness of the cylinder wall at the beginning, then the part of the head of the resistance sensor 3-1 protruding from the inner wall is polished to be flush with the inner wall of the fixed node 1, so as to realize synchronous wear. The wear of the cylinder causes the wear and length reduction of the resistance sensor 3-1, and then causes the change of the resistance value, and the signal is transmitted to the host computer 9 through the signal transmission system.

[0032] Further, in order to stably install the resistance sensor 3-1, a mounting seat 3-2 and a protective cover 3-3 are further included, the resistance sensor 3-1 is bolted to the mounting seat 3-2, and an end face sealing form is adopted, so as to meet the requirement that the sensor does not leak under the condition of 1 MPa and 120 DEG C, the mounting seat 3-2 is welded to the outer wall of the fixed node 1, so as to prevent the sensor from falling off due to vibration of the fixed node 1, and the protective cover 3-3 covers the joint of the resistance sensor 3-1, so as to prevent the joint from being damaged due to collision of external foreign matters. The sealing glue 4 can be poured into the gap between the counterbore of the fixed node 1 and the resistance sensor 3-1, and after solidification, the sealing glue 4 plays the role of fixing the sensor and preventing leakage. Of course, other installation modes and sealing modes can also be adopted, which are all within the protection scope of the application.

[0033] Specifically, the fixed node 1 includes a wear-resistant plate 1-1, a structure plate 1-2 and a reinforcing plate 1-3 which are sequentially sleeved from inside to outside, the resistance sensor 3-1 sequentially penetrates the reinforcing plate 1-3, the structure plate 1-2 and the wear-resistant plate 1-1, the head of the resistance sensor 3-1 is flush with the inner wall of the wear-resistant plate 1-1, and the mounting seat 3-2 is welded to the outer wall of the reinforcing plate 1-3.

[0034] The signal transmission system comprises the signal acquisition module 5, the transition box 6, the transmitting box 7 and the signal receiver 8 connected in sequence, the signal acquisition module 5 is connected with the wear detection probe 3, and the signal receiver 8 is connected with the host computer 9. The resistance sensor 3-1 causes the resistance value change parameter, and then the parameter is transmitted to the signal acquisition module 5 through the cable and is converted into a digital signal. The transition box 6 collects the digital signals output by the signal acquisition module 5, and transmits the digital signals to the transmitting box 7, and then the data is transmitted to the signal receiver 8 through wireless, and finally the data is input into the host computer 9 of the shield tunneling machine, so that the thickness of the cylinder is monitored in real time. After the thickness of the cylinder is monitored in the host computer 9, the corresponding warning program is set, the foam system 10 is quickly started, the foam pipeline 11 is connected to the fixed segment 1, and the foam and other soil conditioners are injected into the fixed segment 1, so that the cylinder is lubricated and the wear is reduced.

[0035] In order to stably connect the foam pipeline 11, the foam hole seat 2 is installed on the cylinder wall of the fixed segment 1. The foam hole seat 2 has a threaded hole interface penetrating in the inside, which is used for connecting the foam pipeline 11, and the foam hole seat 2 is welded and installed on the outer wall of the fixed segment 1. Specifically, a plurality of foam hole seats 2 are arranged on both sides of the fixed segment 1 in the horizontal direction, and at least two foam hole seats 2 are arranged on each side, and the plurality of foam hole seats 2 on the same side are arranged in the axial direction.

[0036] On the basis of the automatic lubrication screw conveyor cylinder provided by the above-mentioned embodiments, a plurality of wear detection probes 3 are arranged on the lower cylinder wall of the fixed segment 1 in the circumferential direction. The plurality of wear detection probes 3 can be arranged on the same circumference, or can be staggered in the axial direction. The specific position of the wear detection probe 3 is determined according to the wear degree in the actual process.

[0037] Since the screw shaft rotates out of slag in the forward rotation mode, the most serious wear position is distributed in the lower right position; at least two through counterbores can be uniformly arranged in the range of a°(0°<a°<90°) to b°(0°<a°<90°) to the left (in the tunneling direction) below the fixed segment 1. Specifically, a° can be less than b°, or the parameter size can be adjusted according to the situation.

[0038] The counterbore is formed by successively tapping the reinforcing plate 1-3, the structural plate 1-2 and the wear plate 1-1, so as to install the resistance sensor 3-1; the resistance sensor 3-1 is embedded in the counterbore of the fixed joint 1, the mounting seat 3-2 is welded on the outer wall of the reinforcing plate 1-3 of the fixed joint 1, and the whole wear detection probe 3 is fixed; the resistance sensor 3-1 and the counterbore of the fixed joint 1 are filled with sealant 4 to strengthen the fixing and prevent water leakage; the part of the probe of the resistance sensor 3-1 protruding from the wear plate 1-1 is polished to be flush with the wear plate 1-1, so as to realize synchronous wear; the joint of the resistance sensor 3-1 is connected to the signal acquisition module 5 through a cable, and then connected to subsequent components; the transmitting box 7 transmits data to the signal receiver 8 wirelessly, and accesses the main control computer 9 platform system to realize real-time feedback of the thickness of the cylinder.

[0039] In the automatic lubrication screw conveyor cylinder for online detection of wear provided by another embodiment of the present application, the wear detection probe 3 can also be an electromagnetic ultrasonic probe, which is attached to the outer wall of the lower cylinder wall of the fixed joint 1. The electromagnetic ultrasonic probe is composed of a permanent magnet and a coil, and transmits ultrasonic signals from the outer wall of the fixed joint 1 cylinder to the inner wall and reflects back. When received, the signal round-trip time difference is recorded, and the wall thickness is calculated by wave speed and time difference; the signal is transmitted to the main control computer 9; the main control computer 9 controls the foam system 10 to work.

[0040] The installation steps are as follows: select a detection point on the outer wall of the easily-worn area of the lower cylinder wall of the fixed joint 1 and mark it; set a through hole on the fixed joint 1 for connecting the foam pipeline 11. Attach the electromagnetic ultrasonic probe to the marked position on the outer wall of the cylinder wall of the fixed joint 1 and fix it; the other end of the electromagnetic ultrasonic probe is connected to the signal transmission system through a cable.

[0041] In addition to the above-mentioned automatic lubrication screw conveyor cylinder for online detection of wear, the specific embodiment of the present application also provides a shield machine comprising the above-mentioned automatic lubrication screw conveyor cylinder for online detection of wear. The structures of other parts of the shield machine refer to the prior art, and will not be described here.

[0042] Specifically, the above-mentioned automatic lubrication screw conveyor cylinder for online detection of wear can be an earth pressure balance shield machine.

[0043] The automatic lubrication screw conveyor cylinder for online detection of wear and the shield machine provided by the present application are described in detail above. In this paper, specific examples are applied to describe the principles and implementation methods of the present application. The above examples are only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. An automatic lubricated screw conveyor barrel for online detection of wear, comprising a cylindrical stationary section (1), characterized in that, Further comprising a wear detection probe (3), a signal transmission system, a host computer (9) and a foam system (10), the wear detection probe (3) is installed on the lower side of the fixed joint (1) and is used to detect the wear degree of the lower side of the fixed joint (1), the signal transmission system is used to transmit the detection data of the wear detection probe (3) to the host computer (9), and the foam system (10) is connected with the inside of the fixed joint (1) through a foam pipeline (11), and the host computer (9) controls the foam system (10) to inject lubricating medium into the fixed joint (1) according to the wear degree; According to the data of the online monitoring of the wear of the cylinder obtained by the wear detection probe (3), different degree of early warning programs are set on the platform system of the host computer (9), which are divided into green early warning, yellow early warning, orange early warning and red early warning, the thickness wear of the green early warning is ≤30%, the thickness wear of the yellow early warning is between 30%-60%, the thickness wear of the orange early warning is between 60%-90%, and the thickness wear of the red early warning is >90%; when the green early warning is processed, the remaining driving distance and the geological conditions are considered, the foam system (10) is started, and the number and flow of the foam injected into the fixed joint (1) are reasonably controlled; when the yellow early warning is processed, all the foam lines injecting into the fixed joint (1) are started, and the flow is adjusted to the maximum; when the orange early warning is processed, on the basis of the yellow early warning processing, the pop-up window reminds to pay attention to the wear of the fixed joint (1) at all times; when the red early warning is processed, the system alarms, and it is suggested to repair the worn area of the cylinder immediately.

2. The self-lubricating screw conveyor barrel for online detection of wear according to claim 1, characterized in that, The wear detection probe (3) comprises a resistance sensor (3-1), the resistance sensor (3-1) penetrates the cylinder wall on the lower side of the fixed joint (1), and the head of the resistance sensor (3-1) is flush with the inner wall of the fixed joint (1).

3. The self-lubricating screw conveyor barrel for online detection of wear according to claim 2, characterized in that, The wear detection probe (3) further comprises a mounting seat (3-2) and a protective cover (3-3), the resistance sensor (3-1) is bolted to the mounting seat (3-2), the mounting seat (3-2) is welded to the outer wall of the fixed joint (1), the protective cover (3-3) covers the joint of the resistance sensor (3-1), and the resistance sensor (3-1) and the fixed joint (1) are filled with sealant (4).

4. The self-lubricating screw conveyor barrel for online detection of wear according to claim 3, characterized in that, The fixed joint (1) comprises wear-resistant plates (1-1), structure plates (1-2) and reinforcing plates (1-3) which are sequentially sleeved from inside to outside, the resistance sensor (3-1) penetrates the reinforcing plates (1-3), the structure plates (1-2) and the wear-resistant plates (1-1) in sequence, the head of the resistance sensor (3-1) is flush with the inner wall of the wear-resistant plate (1-1), and the mounting seat (3-2) is welded to the outer wall of the reinforcing plate (1-3).

5. The self-lubricating screw conveyor barrel for online detection of wear according to claim 1, characterized in that, The wear detection probe (3) comprises an electromagnetic ultrasonic probe, and the electromagnetic ultrasonic probe is attached to the outer wall of the lower side of the fixed joint (1).

6. The self-lubricating screw conveyor barrel for online detection of wear according to claim 1, characterized in that, The signal transmission system comprises a signal acquisition module (5), a transition box (6), a transmitting box (7) and a signal receiver (8) connected in sequence, the signal acquisition module (5) is connected with the wear detection probe (3), and the signal receiver (8) is connected with the host computer (9).

7. The self-lubricating screw conveyor barrel for online detection of wear according to claim 1, characterized in that, The foam hole seat (2) for connecting the foam pipeline (11) is arranged on the cylinder wall of the fixed joint (1).

8. The self-lubricating screw conveyor barrel for online detection of wear according to claim 7, characterized in that, A plurality of foam hole seats (2) are arranged on the two sides of the horizontal direction of the fixed joint (1), and at least two foam hole seats (2) are arranged on each side.

9. The self-lubricating screw conveyor barrel for online detection of wear according to any one of claims 1 to 8, characterized in that, A plurality of wear detection probes (3) are arranged on the lower cylinder wall of the fixed joint (1) in sequence in the circumferential direction.

10. A tunneling machine characterized by, The automatic lubrication screw conveyor cylinder comprising the online detection wear device as claimed in any one of claims 1 to 9.

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