Protective device for thrust cylinder of shield tunneling machine

Abstract

The utility model discloses a shield tunneling machine thrust oil cylinder protection device, which relates to the technical field of shield tunneling machines and comprises an oil cylinder body, a fitting protection mechanism is arranged on the outer side of the oil cylinder body and comprises a first protection shell, and a second protection shell is arranged on the outer side of the first protection shell. The inner wall of the first protective shell and the inner wall of the second protective shell are jointly in threaded connection with two sets of mounting bolts, the outer surface of each set of mounting bolts is in threaded connection with a mounting nut, and the outer surface of the oil cylinder body is slidably connected with a first protective inner shell and a second protective inner shell. The oil cylinder body, the first protective outer shell, the second protective outer shell, the mounting bolt, the mounting nut, the first protective inner shell, the second protective inner shell, the first fastening screw and the second fastening screw are matched with one another; and the first fastening screw and the second fastening screw can tightly wrap the outer surface of the telescopic end of the oil cylinder body after the first protective inner shell and the second protective inner shell are in butt joint.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machines, in particular to a shield machine propulsion oil cylinder protection device. Background Art

[0002] A shield machine is a tunnel boring machine that uses the shield method. It can support the tunnel lining while excavating, and can achieve one-time forming. It has the advantages of high degree of automation, fast construction speed and little impact on ground buildings. The thrust cylinder is one of the key components of the shield machine. Its main function is to provide a strong thrust for the advancement of the shield machine. Through the coordinated work of multiple thrust cylinders, the shield machine is pushed forward underground. When encountering complex geological conditions and there may be large impact force or vibration, in order to prevent the cylinder from being damaged, corresponding protective devices are often used to buffer and absorb part of the energy.

[0003] According to the utility model with authorization announcement number CN218894651U, a shield machine and shield body articulated cylinder protection device is disclosed. Although the device can quickly adapt to the actual distance between the front and rear shield components in the current working condition by adjusting the distance between the two ends of the telescopic rod, it can completely replace the articulated cylinder to transmit the extraordinary propulsion force applied by the propulsion cylinder to the shield body under the current working condition, avoid the articulated cylinder from being directly subjected to force and protect the articulated cylinder, and while playing a good protective role for the articulated cylinder, it will not affect the established steering angle of the shield body of the shield machine. However, after the propulsion cylinder is extended, the separated shield machine structure will cause external stones to hit the cylinder, and there is a lack of a fitting protection structure that can follow the extension and contraction of the cylinder and always fit the cylinder, resulting in a relatively general protection effect of the protection device. To this end, we provide a shield machine propulsion cylinder protection device to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide a shield machine propulsion cylinder protection device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a shield machine propulsion cylinder protection device, comprising a cylinder body, the outer side of which is provided with a fitting protection mechanism;

[0006] The fitting protection mechanism includes a first protective outer shell, a second protective outer shell is arranged on the outer side of the first protective outer shell, the inner wall of the first protective outer shell and the inner wall of the second protective outer shell are threadedly connected with two groups of mounting bolts, the outer surface of each group of mounting bolts is threadedly connected with a mounting nut, the outer surface of the cylinder body is slidingly connected with a first protective inner shell and a second protective inner shell, and the inner wall of the first protective inner shell is threadedly connected with two first fastening screws and two groups of second fastening screws.

[0007] Furthermore, the back side of the second protective outer shell contacts the front side of the first protective outer shell, the back side of the second protective inner shell contacts the front side of the first protective inner shell, the outer surface of the first protective inner shell is slidingly connected to the interior of the first protective outer shell, the outer surface of the second protective inner shell is slidingly connected to the interior of the second protective outer shell, the outer surfaces of the two first fastening screws and the outer surfaces of the two groups of second fastening screws are both in contact with the inner wall of the second protective inner shell, the inner wall of the first protective outer shell and the inner wall of the second protective outer shell are both fixedly connected with a first anti-slip elastic pad, and the inner wall of each of the first anti-slip elastic pads is in contact with the outer surface of the cylinder body.

[0008] Furthermore, two positioning blocks are fixedly connected to the front side of the first protective shell, and the outer surface of each positioning block is snap-fitted to the interior of the second protective shell.

[0009] Furthermore, the outer surface of each group of mounting bolts is sleeved with two washers, and the back surface of each washer is in contact with the outer surface of the second protective shell.

[0010] Furthermore, the inner wall of the first protective inner shell and the inner wall of the second protective inner shell are both fixedly connected with second anti-skid elastic pads, and the inner wall of each of the second anti-skid elastic pads is in contact with the outer surface of the telescopic end of the cylinder body.

[0011] Furthermore, the outer surface of the first protective inner shell and the outer surface of the second protective inner shell are both fixedly connected to the limiting slider, wherein the outer surface of one limiting slider is slidably connected to the interior of the first protective outer shell, and the outer surface of the other limiting slider is slidably connected to the interior of the second protective outer shell.

[0012] Furthermore, the inner wall of the first protective outer shell and the inner wall of the second protective outer shell are both fixedly connected with wear-resistant smooth half rings, wherein the inner wall of one of the wear-resistant smooth half rings contacts the outer surface of the first protective inner shell, and the inner wall of the other wear-resistant smooth half ring contacts the outer surface of the second protective inner shell.

[0013] Compared with the prior art, the shield machine propulsion cylinder protection device has the following beneficial effects:

[0014] The utility model cooperates with the cylinder body, the first protective outer shell, the second protective outer shell, the mounting bolts, the mounting nuts, the first protective inner shell, the second protective inner shell, the first fastening screw and the second fastening screw. The first fastening screw and the second fastening screw can tightly wrap the outer surface of the telescopic end of the cylinder body after the first protective inner shell and the second protective inner shell are connected. The mounting bolts and the mounting nuts can tightly wrap the outer surface of the cylinder body after the first protective outer shell and the second protective outer shell are connected. The first protective inner shell and the second protective inner shell can slide up and down inside the first protective outer shell and the second protective outer shell respectively. Therefore, when the cylinder body is extended and retracted, the first protective outer shell, the second protective outer shell, the first protective inner shell and the second protective inner shell can dynamically protect the cylinder body and its telescopic end, which greatly improves the protective effect of the cylinder body and avoids the problem that the protective effect of the protective device is relatively general due to the lack of a fitting protective structure that can always fit the cylinder with the extension and retraction of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional overall structural schematic diagram of the shield machine propulsion cylinder protection device of the utility model;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the first protective housing of the utility model when viewed from the side;

[0017] Figure 3 It is a three-dimensional structural diagram of the second protective inner shell of the utility model;

[0018] Figure 4 It is a three-dimensional structural diagram of the oil cylinder body of the utility model;

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the first protective shell of the utility model.

[0020] In the figure: 1. Cylinder body; 2. Fitting protection mechanism; 201. First protective outer shell; 202. Second protective outer shell; 203. Mounting bolts; 204. Mounting nuts; 205. First protective inner shell; 206. Second protective inner shell; 207. First fastening screw; 208. Second fastening screw; 3. Washer; 4. Positioning block; 5. First anti-skid elastic pad; 6. Second anti-skid elastic pad; 7. Wear-resistant smooth half ring; 8. Limiting slider. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0022] The present embodiment provides a shield machine propulsion cylinder protection device, which is used for the external protection of the shield machine propulsion cylinder. The device can be installed in contact with the outer surface of the propulsion cylinder and the outer surface of its telescopic end, and can be extended and retracted along with the extension and retraction of the propulsion cylinder, thereby greatly increasing the protection effect on the propulsion cylinder.

[0023] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A shield machine propulsion cylinder protection device comprises a cylinder body 1, and a fitting protection mechanism 2 is arranged on the outer side of the cylinder body 1. The fitting protection mechanism 2 comprises a first protective shell 201, and a second protective shell 202 is arranged on the outer side of the first protective shell 201. The back of the second protective shell 202 contacts the front of the first protective shell 201. The inner wall of the first protective shell 201 and the inner wall of the second protective shell 202 are fixedly connected with a first anti-skid elastic pad 5. The inner wall of each first anti-skid elastic pad 5 contacts the outer surface of the cylinder body 1. By providing the first anti-skid elastic pad 5, the inner wall itself has good anti-skid property and elasticity, and can elastically press the outer surface of the cylinder body 1 after the first protective shell 201 and the second protective shell 202 are fully docked, so that the first protective shell 201 and the second protective shell 202 can be tightly attached to the cylinder body 1 and are not easy to separate.

[0024] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 The inner wall of the first protective shell 201 and the inner wall of the second protective shell 202 are threadedly connected with two sets of mounting bolts 203. The front of the first protective shell 201 is fixedly connected with two positioning blocks 4. The outer surface of each positioning block 4 is snap-fitted with the interior of the second protective shell 202. By providing the positioning blocks 4, they can be snap-fitted with the interior of the second protective shell 202, thereby increasing the simplicity and stability of splicing the first protective shell 201 and the second protective shell 202.

[0025] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 The outer surface of each set of mounting bolts 203 is threadedly connected with a mounting nut 204, and the outer surface of each set of mounting bolts 203 is sleeved with two washers 3, and the back of each washer 3 is in contact with the outer surface of the second protective shell 202. By providing washers 3, they can be padded between the second protective shell 202 and the mounting bolts 203, thereby increasing the contact area between the two and increasing the tightening effect of the mounting bolts 203.

[0026] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The outer surface of the cylinder body 1 is slidably connected with the first protective inner shell 205 and the second protective inner shell 206, respectively. The back of the second protective inner shell 206 contacts the front of the first protective inner shell 205. The outer surface of the first protective inner shell 205 is slidably connected with the inside of the first protective outer shell 201. The outer surface of the second protective inner shell 206 is slidably connected with the inside of the second protective outer shell 202. The inner wall of the first protective inner shell 205 and the inner wall of the second protective inner shell 206 are fixedly connected with the second anti-skid elastic pad 6. The inner wall of each second anti-skid elastic pad 6 contacts the outer surface of the telescopic end of the cylinder body 1. The outer surface of the first protective inner shell 205 and the outer surface of the second protective inner shell 206 are fixedly connected with the limiting slider 8, and one of the limiting sliders 8 has a The outer surface is slidably connected to the inside of the first protective outer shell 201, and the outer surface of another limiting slider 8 is slidably connected to the inside of the second protective outer shell 202. By providing a second anti-slip elastic pad 6, it itself has good elasticity and anti-slip properties, so that the inner wall of the first protective inner shell 205 and the inner wall of the second protective inner shell 206 can be closely attached to the outer surface of the telescopic end of the cylinder body 1, so that the two are not easily pushed away from the outer surface of the telescopic end of the cylinder body 1. By providing a limiting slider 8, they can slide with the inside of the first protective outer shell 201 and the inside of the second protective outer shell 202 respectively, thereby increasing the sliding directional stability of the first protective inner shell 205 relative to the first protective outer shell 201 and the sliding directional stability of the second protective inner shell 206 relative to the second protective outer shell 202.

[0027] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 The inner wall of the first protective inner shell 205 is respectively threadedly connected with two first fastening screws 207 and two groups of second fastening screws 208, and the outer surfaces of the two first fastening screws 207 and the outer surfaces of the two groups of second fastening screws 208 are in contact with the inner wall of the second protective inner shell 206. The inner wall of the first protective outer shell 201 and the inner wall of the second protective outer shell 202 are fixedly connected with a wear-resistant smooth half ring 7, wherein the inner wall of one wear-resistant smooth half ring 7 is in contact with the outer surface of the first protective inner shell 205, and the inner wall of the other wear-resistant smooth half ring 7 is in contact with the outer surface of the second protective inner shell 206. By providing the wear-resistant smooth half ring 7, it has a relatively large hardness and the inner wall is very smooth, and can also be filled with matching lubricating oil for use, which can increase the sliding smoothness of the first protective inner shell 205 relative to the first protective outer shell 201 and the sliding smoothness of the second protective inner shell 206 relative to the second protective outer shell 202.

[0028] Working principle: When in use, first use the first fastening screw 207 and the second fastening screw 208 to pass through the second protective inner shell 206 and the first protective inner shell 205 respectively, and then threadedly connect with the first protective inner shell 205. The spliced ​​first protective inner shell 205 and the second protective inner shell 206 can make the two second anti-skid elastic pads 6 tightly wrap the outer surface of the telescopic end of the cylinder body 1. Then, the first protective outer shell 201 and the second protective outer shell 202 are respectively covered on the outer surfaces of the first protective inner shell 205 and the second protective inner shell 206, and the first protective outer shell 201 and the second protective outer shell 202 are fastened and docked with the mounting bolts 203 and the mounting nuts 204. The spliced ​​first protective outer shell 201 and the second protective outer shell 202 can make the two The first anti-slip elastic pad 5 tightly wraps the outer surface of the cylinder body 1. Next, when the cylinder body 1 is extended or retracted, the first protective inner shell 205 and the second protective inner shell 206 will also slide up and down inside the first protective outer shell 201 and the second protective outer shell 202 respectively. Therefore, when the cylinder body 1 is extended or retracted, the first protective outer shell 201, the second protective outer shell 202, the first protective inner shell 205 and the second protective inner shell 206 can dynamically protect the cylinder body 1 and its telescopic end, which greatly improves the protective effect of the cylinder body 1. The design of the entire shield machine propulsion cylinder protection device effectively solves the problem that the protection effect of the protection device is relatively general due to the lack of a fitting protection structure that can always fit the cylinder as the cylinder is extended or retracted.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shield machine propulsion cylinder protection device, comprising a cylinder body (1), characterized in that: A fitting protection mechanism (2) is provided on the outer side of the oil cylinder body (1); The fitting protection mechanism (2) comprises a first protective outer shell (201), a second protective outer shell (202) is arranged on the outer side of the first protective outer shell (201), two groups of mounting bolts (203) are threadedly connected to the inner wall of the first protective outer shell (201) and the inner wall of the second protective outer shell (202), and the outer surface of each group of mounting bolts (203) is threadedly connected to a mounting nut (204), and the outer surface of the oil cylinder body (1) is slidably connected to a first protective inner shell (205) and a second protective inner shell (206), and the inner wall of the first protective inner shell (205) is threadedly connected to two first fastening screws (207) and two groups of second fastening screws (208).

2. A shield machine propulsion cylinder protection device according to claim 1, characterized in that: The back surface of the second protective outer shell (202) contacts the front surface of the first protective outer shell (201), the back surface of the second protective inner shell (206) contacts the front surface of the first protective inner shell (205), the outer surface of the first protective inner shell (205) is slidably connected to the interior of the first protective outer shell (201), the outer surface of the second protective inner shell (206) is slidably connected to the interior of the second protective outer shell (202), the outer surfaces of the two first fastening screws (207) and the outer surfaces of the two groups of second fastening screws (208) are in contact with the inner wall of the second protective inner shell (206), the inner wall of the first protective outer shell (201) and the inner wall of the second protective outer shell (202) are both fixedly connected with a first anti-slip elastic pad (5), and the inner wall of each of the first anti-slip elastic pads (5) is in contact with the outer surface of the cylinder body (1).

3. A shield machine propulsion cylinder protection device according to claim 1, characterized in that: Two positioning blocks (4) are fixedly connected to the front of the first protective shell (201), and the outer surface of each positioning block (4) is snap-fitted to the inside of the second protective shell (202).

4. A shield machine propulsion cylinder protection device according to claim 1, characterized in that: Two washers (3) are sleeved on the outer surface of each group of mounting bolts (203), and the back surface of each washer (3) is in contact with the outer surface of the second protective shell (202).

5. The shield machine propulsion cylinder protection device according to claim 1, characterized in that: The inner wall of the first protective inner shell (205) and the inner wall of the second protective inner shell (206) are both fixedly connected with a second anti-skid elastic pad (6), and the inner wall of each second anti-skid elastic pad (6) is in contact with the outer surface of the telescopic end of the cylinder body (1).

6. A shield machine propulsion cylinder protection device according to claim 1, characterized in that: The outer surface of the first protective inner shell (205) and the outer surface of the second protective inner shell (206) are both fixedly connected to a limiting slider (8), wherein the outer surface of one limiting slider (8) is slidably connected to the interior of the first protective outer shell (201), and the outer surface of the other limiting slider (8) is slidably connected to the interior of the second protective outer shell (202).

7. The shield machine propulsion cylinder protection device according to claim 1, characterized in that: The inner wall of the first protective outer shell (201) and the inner wall of the second protective outer shell (202) are both fixedly connected with a wear-resistant smooth half ring (7), wherein the inner wall of one of the wear-resistant smooth half rings (7) contacts the outer surface of the first protective inner shell (205), and the inner wall of the other wear-resistant smooth half ring (7) contacts the outer surface of the second protective inner shell (206).

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