Demounting device for telescopic inner cylinder of heading machine

Abstract

The invention discloses a dismounting device for a telescopic inner cylinder of a heading machine, and relates to the technical field of dismounting equipment of heading machines. The jack comprises a cylinder body and a piston rod, the cylinder body is connected to the fixing piece, and the piston rod is telescopically arranged in the cylinder body; when the piston rod moves from the first side of the fixing piece to the second side of the fixing piece, the piston rod can make contact with the rear end face, close to one side of the fixing piece, of the telescopic inner barrel and push the telescopic inner barrel to make axial movement relative to the telescopic outer barrel. Wherein the second side is the side, fixed to the telescopic outer cylinder, of the fixing piece, and the second side and the first side are oppositely arranged. According to the dismounting device for the telescopic inner cylinder of the heading machine, locking friction force can be overcome, the telescopic inner cylinder and the telescopic outer cylinder can be smoothly separated, dismounting of the telescopic inner cylinder is completed, and the situation of secondary damage to the telescopic inner cylinder and a bearing is avoided.

Description

Technical Field

[0001] This invention relates to the field of tunneling machine disassembly and assembly equipment, and more specifically, to a disassembly device for the telescopic inner cylinder of a tunneling machine. Background Technology

[0002] In mining and tunneling engineering, cantilever roadheaders are one of the core construction equipment. The precision of the fit between the telescopic inner and outer cylinders directly affects the roadheader's tunneling efficiency and operational stability. During long-term, high-intensity underground operations, the roadheader's telescopic section comes into contact with a large amount of dust, sewage, and other impurities. The harsh working environment can easily lead to insufficient lubrication or lack of oil at the mounting points of the 23238 and NNU4938 bearings embedded at the front and rear of the telescopic inner cylinder, respectively, causing the inner and outer cylinders to seize up.

[0003] In related technologies, the outer telescopic cylinder of the tunneling machine is first securely fixed; then, using large lifting equipment, the inner telescopic cylinder is connected via wire ropes or specialized lifting tools, and an upward traction force is applied; finally, by continuously applying traction force, the locked inner telescopic cylinder is pulled out of the outer telescopic cylinder, achieving separation and thus completing the disassembly of the inner telescopic cylinder. However, in practical applications, due to the extremely strong binding force at the locked parts, the traction force applied by the lifting equipment cannot effectively overcome the locking friction. This not only makes it difficult to pull out the inner telescopic cylinder but may also damage the inner telescopic cylinder and bearings, causing secondary failures.

[0004] In summary, how to provide a method that can smoothly disassemble the telescopic inner cylinder and avoid damage to the components is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a disassembly device for the telescopic inner cylinder of a tunneling machine, which can overcome the locking friction and disassemble the telescopic inner cylinder smoothly, avoiding secondary damage to the telescopic inner cylinder and bearings.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A device for disassembling the telescopic inner cylinder of a tunneling machine includes: The fastener is used to fix the telescopic outer cylinder; The jack includes a cylinder and a piston rod, wherein the cylinder is connected to the fixed member and the piston rod is retractably disposed within the cylinder; When the piston rod moves from the first side of the fixing member to the second side of the fixing member, the piston rod can contact the rear end face of the telescopic inner cylinder near the fixing member and push the telescopic inner cylinder to move axially relative to the telescopic outer cylinder. The second side is the side of the fastener fixed to the telescopic outer cylinder, and the second side and the first side are arranged opposite to each other.

[0007] Preferably, one end of the piston rod is placed inside the cylinder, and the other end of the piston rod extends out of the cylinder and is connected to a push plate. The axis of the push plate is collinear with the axis of the piston rod, and the push plate is used to contact the rear end face of the telescopic inner cylinder.

[0008] Preferably, the projection area of ​​the push plate toward the fixing member is a first region, and the first region and the second region completely overlap, wherein the second region is the projection area of ​​the rear end of the telescopic inner cylinder toward the fixing member.

[0009] Preferably, the fastener has multiple fastening holes circumferentially along its edge, which are used to cooperate with fasteners to achieve a fixed connection between the fastener and the telescopic outer cylinder.

[0010] Preferably, the middle region of the fastener is provided with a through hole, the diameter of the push plate is larger than the diameter of the through hole, and the outer edge of the push plate does not extend beyond the edge of the fastening hole.

[0011] Preferably, the fixing member is integrally formed with the cylinder body; And / or, the push plate and the piston rod are integrally formed.

[0012] Preferably, the cylinder body is provided with a first oil port and a second oil port. The first oil port is disposed away from the fixing member, and the second oil port is disposed close to the fixing member. The first oil port is connected to the rodless cavity of the cylinder body, and the second oil port is connected to the rod cavity of the cylinder body.

[0013] Preferably, the first oil port and the second oil port are both located on the side of the cylinder body, and the top of the cylinder body is provided with a first lifting ring.

[0014] Preferably, the top of the fixing member is provided with a second lifting ring, and the direction of the line connecting the center of the first oil port and the second oil port is perpendicular to the direction of the mounting plane where the first lifting ring and the second lifting ring are located.

[0015] Preferably, it also includes a hydraulic pump station, which is equipped with an adjusting component for adjusting the output thrust of the jack to adapt to the telescopic inner cylinder and the telescopic outer cylinder with different degrees of locking.

[0016] The present invention provides a disassembly device for a tunneling machine telescopic inner cylinder, comprising a fixing component and a jack. The fixing component is used to fix the telescopic outer cylinder. The cylinder of the jack is connected to the fixing component to realize the installation and fixation of the entire disassembly device relative to the telescopic outer cylinder. The piston rod of the jack is telescopically disposed in the cylinder. When a lock-up occurs between the telescopic inner cylinder and the telescopic outer cylinder, the piston rod is controlled to move from the first side of the fixing component to the second side of the fixing component, so that an axial thrust can be applied by the jack to push from the rear end of the telescopic inner cylinder, thereby overcoming the lock-up friction between the telescopic inner cylinder and the telescopic outer cylinder, so that the telescopic inner cylinder and the telescopic outer cylinder can be reliably, efficiently and safely separated.

[0017] The beneficial effects of this invention are as follows: by utilizing the relatively stable movement of the piston rod of the jack and the cylinder body, the piston plate is driven to push the telescopic inner cylinder, thereby realizing the relative movement of the telescopic inner cylinder and the telescopic outer cylinder, and finally completing the safe separation of the two, avoiding secondary damage to the components. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the tunneling machine telescopic inner cylinder disassembly device provided by the present invention; Figure 2 for Figure 1 A half-section view; Figure 3 for Figure 1 The right view; Figure 4 A schematic diagram showing the usage state of the tunneling machine telescopic inner cylinder disassembly device provided by the present invention; Figure 5 for Figure 4 A sectional view.

[0020] Figures 1-5 In the accompanying drawings, the reference numerals include: 01-Telescopic section; 02-Tunneling machine telescopic inner cylinder disassembly device; 1-Fixing component; 2-Piston rod; 3-Cylinder body; 4-Push plate; 5-First oil port; 6-Second oil port; 7-First lifting ring; 8-Second lifting ring; 9-Main shaft; 10-NNU4938 bearing; 11-Telescopic inner cylinder; 12-Telescopic outer cylinder; 13-23238 bearing; 101-Fastening hole; S1 - First side; S2 - Second side. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The core of this invention is to provide a disassembly device for the telescopic inner cylinder of a tunneling machine, which can smoothly disassemble the telescopic inner cylinder and avoid secondary damage to the components.

[0023] The present invention provides a tunneling machine telescopic inner cylinder disassembly device 02, including a fixing component 1 and a jack. Please refer to [reference needed]. Figure 1 , Figure 2 .

[0024] The second side S2 of the fastener 1 is used to fix it to the telescopic outer cylinder 12; the first side S1 and the second side S2 of the fastener 1 are as follows: Figure 2 As shown, the two sides in the thickness direction of the fastener 1 are defined.

[0025] The second side S2 of the specific fastener 1 and the telescopic outer cylinder 12 are fixed in a detachable manner. When using the disassembly device, the fastener 1 and the telescopic outer cylinder 12 can be fixed again, and the fixed connection can be released when disassembly is completed. The specific detachable connection method can be achieved by using a combination of fastening screws, bolts, nuts, washers, etc., as long as it can achieve a reliable and stable fixing effect.

[0026] The fixing component 1 is connected to the telescopic outer cylinder 12 to fix the entire disassembly device. The jack is connected to the fixing component 1 to fix it relative to the telescopic outer cylinder 12.

[0027] The jack includes a cylinder body 3 and a piston rod 2. The cylinder body 3 is fixed to the fixing component 1, and the piston rod 2 is telescopically located inside the cylinder body 3. The connection between the cylinder body 3 and the fixing component 1 can be detachable, welded, or integrally formed, as long as a reliable fixing effect is ensured.

[0028] In one specific implementation, the cylinder body 3 and the fixing part 1 are welded together. When the fixing part 1 and the telescopic outer cylinder 12 are fixed, the jack is fixed relative to the telescopic outer cylinder 12, ensuring the reliable operation of the jack.

[0029] When the piston rod 2 moves from the first side S1 of the fixing member 1 to the second side S2 of the fixing member 1, the piston rod 2 can contact the rear end face of the telescopic inner cylinder 11 near the fixing member 1 and push the telescopic inner cylinder 11 to move axially relative to the telescopic outer cylinder 12. Figure 5The arrows indicate the direction of movement of piston rod 2. Piston rod 2 extends to push the telescopic inner cylinder 11 to move axially relative to the telescopic outer cylinder 12.

[0030] In this embodiment, it should be noted that the telescopic inner cylinder 11 and telescopic outer cylinder 12 refer to the components included in the telescopic part 01 of the tunneling machine. In addition to the telescopic inner cylinder 11 and telescopic outer cylinder 12, the telescopic part 01 also includes a main shaft 9, and one 23238 bearing 13 and one NNU4938 bearing 10 embedded at the front and rear of the telescopic inner cylinder 11, respectively. During long-term high-intensity underground operations, the telescopic part 01 of the tunneling machine will come into contact with a large amount of dust, sewage and other impurities, and the working environment is harsh, which can easily lead to insufficient lubrication and oil shortage at the embedded parts of the 23238 bearing 13 and NNU4938 bearing 10. When the bearings are short of oil, abnormal friction will occur during the rolling process of the rolling elements, which will lead to plastic deformation and enlargement of the ø355×300 mating parts, ultimately causing the front end of the telescopic inner cylinder 11 and the telescopic outer cylinder 12 to seize up and be unable to telescopically extend and retract normally. This application proposes to safely and efficiently disassemble the telescopic inner cylinder 11 by cooperating with the jack and the fixing part 1.

[0031] For details, please refer to Figure 4 , Figure 5 When the telescopic inner cylinder 11 and the telescopic outer cylinder 12 are locked together, an axial force is applied by a jack from the first side S1 parallel to the fixed part 1 to the second side S2 of the fixed part 1. This axial force can contact the rear end face of the telescopic inner cylinder 11 to effectively overcome the severe locking friction caused by the enlarged size of the joint and successfully detach the telescopic inner cylinder 11 from the telescopic outer cylinder 12.

[0032] In some usage scenarios, when the telescopic part 01 is in a horizontal state, the telescopic inner cylinder 11 is pushed by the piston rod 2 of the jack to move the telescopic inner cylinder 11 relative to the telescopic outer cylinder 12; the telescopic part 01 is then turned into a vertical state, that is, the axis direction is horizontal. Then, with the help of equipment such as a crane, the telescopic inner cylinder 11 is lifted from the front end of the telescopic inner cylinder 11 and removed from the telescopic part 01 as a whole so that it can be inspected and maintained.

[0033] In this embodiment, the use of jacks provides stable power with a maximum pressure of 70 MPa and a maximum thrust of 266 tons, sufficient to overcome the locking friction between the telescopic inner cylinder 11 and the telescopic outer cylinder 12, ensuring efficient and safe completion of the disassembly operation. This method of applying axial thrust, pushing the telescopic inner cylinder 11 from its rear end to its front end, avoids secondary damage to the surface of the telescopic inner cylinder 11 and the embedded NNU4938 bearing 10 during disassembly, reducing maintenance costs and time. The stable and controllable force application eliminates safety hazards during disassembly, improves disassembly efficiency, reduces tunneling machine downtime, and ensures the smooth progress of the project.

[0034] Based on the above embodiments, please refer to Figure 2 One end of the piston rod 2 is placed inside the cylinder 3, and the other end of the piston rod 2 extends out of the cylinder 3 and is connected to a push plate 4. The axis of the push plate 4 is collinear with the axis of the piston rod 2, and the push plate 4 is used to contact the rear end face of the telescopic inner cylinder 11.

[0035] By contacting the rear end face of the push plate 4 and the telescopic inner cylinder 11, the thrust generated by the piston rod 2 under the action of pressure difference can be reliably transmitted to the rear end of the telescopic inner cylinder 11, so that the axial force can be reliably transmitted, avoiding the loosening of parts and the deviation of force transmission during the force application process, and ensuring that the telescopic inner cylinder 11 can be reliably and safely removed.

[0036] Specifically, the piston rod 2 extends out of the cylinder 3 and is connected to a push plate 4. The push plate 4 increases the contact area between the force-applying end and the telescopic inner cylinder 11, ensuring reliable and stable transmission of axial force, thereby ensuring the detachable effect of the telescopic inner cylinder 11.

[0037] In this embodiment, the axis of the push plate 4 is collinear with the axis of the piston rod 2. That is, the push plate 4 is a circular structure that mates with the rear end face of the telescopic inner cylinder 11. The axes of the push plate 4, the piston rod 2, and the telescopic inner cylinder 11 are all collinear, which allows for precise disassembly of the telescopic inner cylinder 11.

[0038] Based on any of the above embodiments, please refer to Figure 5 The projection area of ​​the push plate 4 toward the fixing member 1 is the first area, and the first area and the second area completely overlap. The second area is the projection area of ​​the rear end of the telescopic inner cylinder 11 toward the fixing member 1.

[0039] The dimensions of the push plate 4 are designed to perfectly match the outer diameter, rear end face dimensions, and installation interface specifications of the telescopic inner cylinder 11, ensuring that the push plate 4 can fit tightly against the rear end face of the telescopic inner cylinder 11 and bear force evenly. The relative position and dimensional parameters of the push plate 4 and the telescopic outer cylinder 12 fixed to the fixing member 1 are precisely designed with reference to the fitting clearance, relative positioning relationship, and installation space of the tail ends of the telescopic inner cylinder 11 and the telescopic outer cylinder 12. This ensures that the fixing member 1 can fit securely against the tail end of the telescopic outer cylinder 12 and achieve reliable fixation, while avoiding interference with the movement of the push plate 4, thus providing a reasonable structural basis for the relative movement of the two.

[0040] In this embodiment, the first region and the second region completely overlap. That is, the size of the push plate 4 is determined according to the outer diameter of the rear end of the telescopic inner cylinder 11, the size of the rear end face, and the specifications of the installation interface, so that the push plate 4 can provide a reliable effect of transmitting axial force, thereby ensuring the reliable assembly and disassembly of the telescopic inner cylinder 11.

[0041] If the connection between the push plate 4 and the piston rod 2 is a detachable connection, then push plates 4 of various specifications can be designed according to different needs to improve the applicability of the entire disassembly device.

[0042] Based on any of the above embodiments, please refer to Figure 3 The fastener 1 has multiple fastening holes 101 around its edge. The fastening holes 101 are used to cooperate with fasteners to achieve a fixed connection between the fastener 1 and the telescopic outer cylinder 12.

[0043] Specifically, multiple fastening holes 101 can be evenly distributed. By passing fasteners such as bolts through the rear end of the telescopic outer cylinder 12 and the fastening holes 101, the entire disassembly device can be fixed relative to the telescopic part 01.

[0044] In one specific embodiment, 26 M24×160 bolts and nuts are used to securely connect the fixing component 1 to the fixed square plate at the rear end of the telescopic outer cylinder 12, ensuring no deviation during the force application process. Combined with the collinear arrangement of the piston rod 2 axis and the telescopic inner cylinder 11 axis, axial thrust can be reliably transmitted, ensuring that the telescopic inner cylinder 11 can be reliably separated from the telescopic outer cylinder 12, overcoming the locking friction force, ensuring safe and efficient disassembly operations, and avoiding secondary damage to components due to uneven force.

[0045] Based on any of the above embodiments, please refer to Figure 1 , Figure 2 The middle area of ​​the fastener 1 is provided with a through hole, the diameter of the push plate 4 is larger than the diameter of the through hole, and the outer edge of the push plate 4 does not exceed the edge of the fastening hole 101.

[0046] By limiting the dimensional relationship between the push plate 4 and the through hole, the specific movable range of the push plate 4 is limited, preventing the push plate 4 from falling off the fixing part 1, and ensuring the reliability of the piston rod 2 in extending and retracting to drive the push plate 4 to reciprocate.

[0047] The central area of ​​the specific fixing component 1 has a through hole, which is used for positioning and installation on the outer periphery of the cylinder body 3. Based on this, the piston rod 2 inside the cylinder body 3 will move relative to the through hole. By limiting the size of the push plate 4 connected to the piston rod 2, the push plate 4 can be kept in the state of the fixing component 1, so as to reliably reciprocate and ensure the reliability and safety of the disassembly operation. The reciprocating power of the specific push plate 4 comes from the piston rod 2 of the jack. For example, the specific push plate 4 can move smoothly and horizontally within the range of 0-400mm, which meets the usage requirements of reliably pushing the telescopic inner cylinder 11 to separate it from the telescopic outer cylinder 12.

[0048] In this embodiment, the outer edge of the push plate 4 does not extend beyond the edge of the fastening hole 101. Specifically, the position of the push plate 4 will not interfere with the fastening operation of the fastening hole 101. A certain safety gap should be left between the outer edge of the push plate 4 and the edge of the fastening hole 101 to avoid damage to the components from collisions and to avoid safety issues caused by interference between the components, thus ensuring that the telescopic inner cylinder 11 can be disassembled reliably and safely.

[0049] Based on any of the above embodiments, the fixing member 1 and the cylinder body 3 are integrally formed; And / or, the push plate 4 and the piston rod 2 are integrally formed.

[0050] The fixing part 1 is integrally formed with the cylinder body 3, and the push plate 4 and piston rod 2 are integrally formed, ensuring lossless transmission of axial force. At the same time, it realizes the firm positioning of the cylinder body 3 and the telescopic outer cylinder 12, avoiding loosening of parts and displacement of force transmission during the application of force, ensuring disassembly stability, avoiding secondary damage to equipment, and reducing maintenance costs and maintenance cycle.

[0051] Specifically, in this embodiment, the fixing part 1 and the cylinder body 3 are integrally formed, and the two can be directly integrated into a single structure during processing. Similarly, the piston rod 2 and the push plate 4 are also similar. Through the integral forming process, the overall structural strength of the entire disassembly device can be guaranteed, the reliable transmission of axial thrust can be guaranteed, and the reliability and safety of disassembling the telescopic inner cylinder 11 can be guaranteed.

[0052] Based on any of the above embodiments, please refer to Figure 2 The cylinder body 3 is provided with a first oil port 5 and a second oil port 6. The first oil port 5 is located away from the fixing member 1, and the second oil port 6 is located close to the fixing member 1. The first oil port 5 is connected to the rodless cavity of the cylinder body 3, and the second oil port 6 is connected to the rod cavity of the cylinder body 3.

[0053] Oil enters through the first oil port 5, corresponding to the movement of the piston rod 2 towards the rear end of the telescopic inner cylinder 11. In this state, oil returns through the second oil port 6. Hydraulic oil is precisely supplied to the rod-side and rodless-side chambers of the cylinder via a hydraulic pump station, enabling smooth horizontal reciprocating movement of the push plate within a range of 40-400mm. It provides stable power with a maximum pressure of 70MPa and a thrust of 266 tons, sufficient to overcome severe locking friction, which is the core guarantee for the efficient and safe completion of dismantling operations in this application. It can efficiently complete dismantling operations, shorten tunneling machine downtime, and requires no modification to the tunneling machine itself. It is easy to operate, highly adaptable, eliminates safety hazards in underground traction operations, reduces maintenance costs, and ensures safe and efficient dismantling.

[0054] Based on any of the above embodiments, the first oil port 5 and the second oil port 6 are both located on the side of the cylinder body 3, and the top of the cylinder body 3 is provided with a first lifting ring 7.

[0055] The first lifting ring 7 is specifically used for the hoisting operation of the entire dismantling device. Since the first oil port 5 and the second oil port 6 are both located on the side, the first lifting ring 7 is set to avoid interference with the first oil port 5 and the second oil port 6, so as to avoid interference with the pipelines corresponding to the oil ports during the hoisting of the first lifting ring 7.

[0056] Specifically, the first oil port 5 is located away from the fixing member 1, and the second oil port 6 is located close to the fixing member 1. This allows for the provision of an axial thrust in the direction of the telescopic inner cylinder 11 to overcome the locking friction and enable the telescopic inner cylinder 11 and the telescopic outer cylinder 12 to separate reliably and quickly.

[0057] Based on any of the above embodiments, please refer to Figure 2 The top of the fastener 1 is provided with a second lifting ring 8, and the direction of the line connecting the center of the first oil port 5 and the second oil port 6 is perpendicular to the direction of the mounting plane where the first lifting ring 7 and the second lifting ring 8 are located.

[0058] The first lifting ring 7 and the second lifting ring 8 are used together for the hoisting operation of the entire disassembly device, respectively corresponding to the two sides of the disassembly device, so as to ensure reliable stability during hoisting.

[0059] The line connecting the centers of the first oil port 5 and the second oil port 6 is perpendicular to the direction of the installation plane where the first lifting ring 7 and the second lifting ring 8 are located, so as to avoid interference between the oil port pipeline and the lifting ring and lifting device, and facilitate installation, handling and on-site hoisting.

[0060] Based on any of the above embodiments, a hydraulic pump station is also included. The hydraulic pump station is equipped with an adjusting component for adjusting the output thrust of the jack to adapt to the telescopic inner cylinder 11 and telescopic outer cylinder 12 with different degrees of locking.

[0061] Specifically, the output thrust can be adjusted by adjusting the adjustment components, and the system pressure can be monitored in real time with a pressure gauge. This allows for precise matching of separation requirements with different degrees of seizure, improving the applicability of the entire device.

[0062] In one specific embodiment, the adjusting component is an overflow valve. For minor seizure conditions, the set pressure of the overflow valve can be reduced to output a smaller thrust and prevent deformation of the inner cylinder. For severe seizure conditions, the set pressure of the overflow valve can be increased to output a larger thrust and effectively overcome seizure friction. The overflow valve also has an overload protection function. When the telescopic inner cylinder 11 becomes stuck, causing the thrust to exceed the preset value, the overflow valve automatically overflows to relieve pressure, preventing the jack, telescopic inner cylinder 11, or telescopic outer cylinder 12 from breaking or deforming due to overload.

[0063] The aforementioned tunneling machine telescopic inner cylinder disassembly device integrates the push plate 4 and the piston rod 2 of the hydraulic jack into a single structure, ensuring that the axial force output by the piston rod 2 can be directly and losslessly transmitted to the push plate 4, and then act on the rear end of the telescopic inner cylinder 11. At the same time, the fixed square plate of the telescopic outer cylinder 12 and the cylinder body 3 of the hydraulic cylinder are integrated into a single structure, so that the cylinder body 3 is firmly positioned with the telescopic outer cylinder 12 through the fixed square plate of the telescopic outer cylinder 12. During operation, the hydraulic pump station outputs high-pressure hydraulic oil to drive the hydraulic cylinder, and the pressure difference of the hydraulic oil is used to achieve the relative and smooth movement of the piston rod 2 and the cylinder body 3, which in turn drives the push plate 4 to push the telescopic inner cylinder 11, realizing the relative movement of the telescopic inner cylinder 11 and the telescopic outer cylinder 12, and finally completing the safe separation of the two.

[0064] The telescopic inner cylinder disassembly device for tunneling machines provided in this application is specifically designed for the specific problem of the EBZ220A cantilever tunneling machine, which is caused by the lack of oil in the NNU4938 bearing, resulting in the enlargement of the ø355×300 part and the seizing of the telescopic inner and outer cylinders. It abandons the drawbacks of the existing lifting and traction methods and adopts an axial horizontal ejection mode, which can avoid secondary damage to the equipment and eliminate safety hazards.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0066] The foregoing has provided a detailed description of a tunneling machine telescopic inner cylinder disassembly device. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of these embodiments are merely illustrative of the method and core ideas of the invention. It should be noted that those skilled in the art can make various improvements and modifications to the invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this invention.

Claims

1. A device for disassembling the telescopic inner cylinder of a tunneling machine, characterized in that, include: Fastener (1), the fastener (1) is used to fix to the telescopic outer cylinder (12); The jack includes a cylinder (3) and a piston rod (2), wherein the cylinder (3) is connected to the fixing member (1), and the piston rod (2) is extendable and retractable within the cylinder (3); When the piston rod (2) moves from the first side (S1) of the fixing member (1) to the second side (S2) of the fixing member (1), the piston rod (2) can contact the rear end face of the telescopic inner cylinder (11) close to the side of the fixing member (1) and push the telescopic inner cylinder (11) to make it move axially relative to the telescopic outer cylinder (12); The second side (S2) is one side of the telescopic outer cylinder (12) where the fixing member (1) is fixed. The second side (S2) and the first side (S1) are arranged opposite to each other.

2. The tunneling machine telescopic inner cylinder disassembly device according to claim 1, characterized in that, One end of the piston rod (2) is placed inside the cylinder (3), and the other end of the piston rod (2) extends out of the cylinder (3) and is connected to a push plate (4). The axis of the push plate (4) is collinear with the axis of the piston rod (2), and the push plate (4) is used to contact the rear end face of the telescopic inner cylinder (11).

3. The tunneling machine telescopic inner cylinder disassembly device according to claim 2, characterized in that, The projection area of ​​the push plate (4) toward the fixing member (1) is the first area, and the first area and the second area completely overlap. The second area is the projection area of ​​the rear end of the telescopic inner cylinder (11) toward the fixing member (1).

4. The tunneling machine telescopic inner cylinder disassembly device according to claim 3, characterized in that, The fastener (1) has a plurality of fastening holes (101) circumferentially arranged on its edge. The fastening holes (101) are used to cooperate with fasteners to achieve a fixed connection between the fastener (1) and the telescopic outer cylinder (12).

5. The tunneling machine telescopic inner cylinder disassembly device according to claim 4, characterized in that, The middle area of ​​the fastener (1) is provided with a through hole, the diameter of the push plate (4) is larger than the diameter of the through hole, and the outer edge of the push plate (4) does not extend beyond the edge of the fastening hole (101).

6. The tunneling machine telescopic inner cylinder disassembly device according to claim 5, characterized in that, The fixing member (1) is integrally formed with the cylinder body (3); And / or, the push plate (4) and the piston rod (2) are integrally formed.

7. The tunneling machine telescopic inner cylinder disassembly device according to claim 1, characterized in that, The cylinder body (3) is provided with a first oil port (5) and a second oil port (6). The first oil port (5) is located away from the fixing member (1), and the second oil port (6) is located close to the fixing member (1). The first oil port (5) is connected to the rodless cavity of the cylinder body (3), and the second oil port (6) is connected to the rod cavity of the cylinder body (3).

8. The tunneling machine telescopic inner cylinder disassembly device according to claim 7, characterized in that, The first oil port (5) and the second oil port (6) are both located on the side of the cylinder body (3), and the top of the cylinder body (3) is provided with a first lifting ring (7).

9. The tunneling machine telescopic inner cylinder disassembly device according to claim 8, characterized in that, The top of the fastener (1) is provided with a second lifting ring (8), and the direction of the line connecting the center of the first oil port (5) and the second oil port (6) is perpendicular to the direction of the mounting plane where the first lifting ring (7) and the second lifting ring (8) are located.

10. The tunneling machine telescopic inner cylinder disassembly device according to any one of claims 1 to 9, characterized in that, It also includes a hydraulic pump station, which is equipped with an adjusting component for adjusting the output thrust of the jack to adapt to the telescopic inner cylinder (11) and the telescopic outer cylinder (12) with different degrees of locking.

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