Shield tunneling machine thrust oil cylinder guide sleeve sealing structure

Abstract

The utility model provides a shield tunneling machine thrust oil cylinder guide sleeve sealing structure which comprises shells, fixing rods are fixedly installed on the left side and the right side of each shell, the number of the shells is two, the shells are symmetrically connected through the fixing rods, sealing mechanisms are arranged in inner cavities of the shells, and the sealing mechanisms are connected with the shells. The sealing mechanism comprises a grip, a rotating shaft, a first hard spring, a connecting block, a first connecting groove, a second connecting groove, a partition plate, a second hard spring and a clamping plate, through the arrangement of the sealing mechanism, leakage of hydraulic oil and invasion of external pollutants can be prevented, and it is guaranteed that the hydraulic system maintains stable propelling force under high pressure; the propelling efficiency and accuracy of the shield tunneling machine are improved, meanwhile, abrasion and corrosion of internal components can be reduced, the service life of key components such as an oil cylinder can be prolonged, the frequency of maintenance and replacement can be reduced, the maintenance cost can be reduced, the working environment can be protected, and environmental pollution caused by hydraulic oil leakage can be avoided.

Description

Technical Field

[0001] The utility model relates to a sealing structure, in particular to a sealing structure of a guide sleeve of a propulsion oil cylinder of a shield machine, belonging to the technical field of shield machines. Background Art

[0002] A shield machine is a tunnel boring machine that uses the shield method. The shield construction method is that the tunnel boring machine builds (lays) the "shield" (referring to the supporting segments) of the tunnel while excavating. It is different from the open construction method. Internationally, the broad shield machine can also be used in rock formations, but it is different from the open (non-shield method) tunnel boring machine. In my country, it is customary to call tunnel boring machines used in soft soil formations (narrow sense) shield machines, and those used in rock formations (narrow sense). Shield machines are generally divided into hand-dug shields, extrusion shields, semi-mechanical shields (local air pressure, global air pressure), mechanical shields (open-chest cutting shields, air pressure shields, slurry pressure shields, earth pressure balance shields, mixed shields, and special-shaped shields) according to their working principles.

[0003] The guide sleeve of the shield machine propulsion cylinder is an important part of the shield machine propulsion system. Its main function is to ensure that the propulsion cylinder maintains the correct axial direction when pushing the shield machine forward, and to guide and distribute the lateral force generated by the cylinder. This helps to reduce the deflection and wear of the cylinder during propulsion, ensuring that the propulsion force of the shield machine is more stable and effective, and the sealing effect of the guide sleeve plays an important role in protecting the propulsion cylinder. If the guide sleeve of the shield machine propulsion cylinder lacks a sealing structure, the hydraulic oil may leak when the cylinder is working, which will not only cause the pressure of the hydraulic system to drop, affecting the stability and propulsion efficiency of the propulsion, but also may cause oil pollution to the inside of the machine and the surrounding environment. The lack of a good seal between the cylinder and the guide sleeve will also allow external impurities such as mud, water, dust and gravel to enter the system, causing wear and corrosion, accelerating the damage of the cylinder and the guide sleeve, and reducing the service life of the shield machine.

[0004] Therefore, a shield machine propulsion cylinder guide sleeve sealing structure is proposed. Utility Model Content

[0005] In view of this, the utility model provides a shield machine propulsion cylinder guide sleeve sealing structure to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0006] The technical solution of the utility model is implemented as follows: it includes a shell, and fixing rods are fixedly installed on the left and right sides of the shell. The number of the shells is two, and they are symmetrically connected by the fixing rods. The inner cavity of the shell is provided with a sealing mechanism, and the sealing mechanism includes a handle, a rotating shaft, a first hard spring, a connecting block, a first connecting groove, a second connecting groove, a partition, a second hard spring and a clamping plate.

[0007] Further preferably, the handle is arranged in the inner cavity of the shell, the first hard spring is arranged on the inner side of the handle, the connecting block is arranged at the end of the first hard spring away from the handle, the first connecting groove is opened on the left and right sides of the handle, the outer side of the rotating shaft is movably connected to the inner side of the first connecting groove, the second connecting groove is opened on the left and right sides of the connecting block, the second hard spring is fixedly connected to the left and right sides of the inner cavity of the shell, and the splint is fixedly connected to the inner side of the connecting block.

[0008] Further preferably, the partition is fixedly connected to the left and right sides of the handle, and the other end of the second hard spring is fixedly connected to the surface of the partition.

[0009] Further preferably, a sealing gasket is fixedly installed on the inner side of the clamping plate, and the sealing gasket is made of rubber.

[0010] Further preferably, a through slot is provided on the inner side of the shell, and the connecting block extends to the outer side of the shell through the through slot.

[0011] Further preferably, guide rods are fixedly mounted on both the left and right sides of the handle, guide holes are opened on both the left and right sides of the inner cavity of the shell, and the guide rods are slidably connected to the inner sides of the guide holes.

[0012] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0013] 1. The utility model can prevent the leakage of hydraulic oil and the intrusion of external pollutants by setting a sealing mechanism, ensure that the hydraulic system maintains a stable propulsion force under high pressure, and improve the propulsion efficiency and accuracy of the shield machine. At the same time, it can reduce the wear and corrosion of internal components, extend the service life of key components such as the oil cylinder, reduce the frequency of maintenance and replacement, reduce maintenance costs, and help protect the working environment, avoid environmental pollution caused by hydraulic oil leakage, and improve engineering safety and environmental protection levels.

[0014] Second, the utility model can play a guiding role by setting the guide hole and the guide rod to prevent the handle from deviating during movement. The sealing gasket can fit with the guide sleeve to further improve the sealing effect.

[0015] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a front view of the main structure of the utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the housing in the utility model;

[0019] Figure 3 This is a structural diagram of the sealing mechanism in the utility model;

[0020] Figure 4 For this utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0021] Figure numerals: 1. Shell; 2. Fixing rod; 3. Sealing mechanism; 301. Handle; 302. Rotating shaft; 303. First hard spring; 304. Connecting block; 305. First connecting groove; 306. Second connecting groove; 307. Partition; 308. Second hard spring; 309. Clamp; 4. Sealing gasket; 5. Through groove; 6. Guide hole; 7. Guide rod. DETAILED DESCRIPTION

[0022] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0023] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0024] Embodiment 1

[0025] like Figure 1-4As shown, the embodiment of the utility model provides a shell 1, and the left and right sides of the shell 1 are fixedly installed with fixing rods 2. The number of shells 1 is two, and they are symmetrically connected through the fixing rods 2. The inner cavity of the shell 1 is provided with a sealing mechanism 3, and the sealing mechanism 3 includes a handle 301, a rotating shaft 302, a first hard spring 303, a connecting block 304, a first connecting groove 305, a second connecting groove 306, a partition 307, a second hard spring 308 and a clamping plate 309. The handle 301 is arranged in the inner cavity of the shell 1, the first hard spring 303 is arranged on the inner side of the handle 301, and the connecting rod 302 is symmetrically connected to the inner cavity of the shell 1. The connecting block 304 is arranged at one end of the first hard spring 303 away from the handle 301, the first connecting groove 305 is opened on the left and right sides of the handle 301, the outer side of the rotating shaft 302 is movably connected to the inner side of the first connecting groove 305, the second connecting groove 306 is opened on the left and right sides of the connecting block 304, the second hard spring 308 is fixedly connected to the left and right sides of the inner cavity of the shell 1, the clamping plate 309 is fixedly connected to the inner side of the connecting block 304, the partition 307 is fixedly connected to the left and right sides of the handle 301, and the other end of the second hard spring 308 is fixedly connected to the surface of the partition 307.

[0026] By setting up the sealing mechanism 3, the leakage of hydraulic oil and the intrusion of external pollutants can be prevented, ensuring that the hydraulic system maintains a stable propulsion force under high pressure, and improving the propulsion efficiency and accuracy of the shield machine. At the same time, it can reduce the wear and corrosion of internal components, extend the service life of key components such as the cylinder, reduce the frequency of maintenance and replacement, reduce maintenance costs, and help protect the working environment, avoid environmental pollution caused by hydraulic oil leakage, and improve engineering safety and environmental protection levels.

[0027] Embodiment 2

[0028] In one embodiment, a sealing gasket 4 is fixedly installed on the inner side of the splint 309, and the sealing gasket 4 is made of rubber. A through groove 5 is opened on the inner side of the shell 1, and the connecting block 304 extends to the outside of the shell 1 through the through groove 5. Guide rods 7 are fixedly installed on the left and right sides of the handle 301, and guide holes 6 are opened on the left and right sides of the inner cavity of the shell 1. The guide rods 7 are slidably connected to the inner side of the guide holes 6.

[0029] The setting of the guide hole 6 and the guide rod 7 can play a guiding role to prevent the handle 301 from deviating during the movement. The setting of the sealing gasket 4 can fit with the guide sleeve, thereby further improving the sealing effect.

[0030] When the utility model is working: by pushing the handle 301 inward, the first hard spring 303 and the second hard spring 308 are squeezed, and at the same time, the outer side of the rotating shaft 302 can be driven to move inward with the handle 301. When the outer side of the rotating shaft 302 moves, it will rotate with itself as the center point. When the rotating shaft 302 rotates, its inner side will rotate in the opposite direction, thereby driving the connecting block 304 to move outward. The movement of the connecting block 304 can drive the clamping plate 309 to move outward. At this time, after the guide sleeve is passed through the clamping plates 309, the hand can release the handle 301. When the first hard spring 303 and the second hard spring 308 lose the squeezing of external force, they will rebound through their own tension, thereby driving the handle 301 to move outward. When the handle 301 moves, it will cause the rotating shaft 302 to rotate in the opposite direction, thereby causing the clamping plate 309 to move inward and fit with the guide sleeve, thereby improving the sealing performance of the guide sleeve.

[0031] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A shield machine propulsion cylinder guide sleeve sealing structure, characterized in that: The invention comprises a shell (1), wherein fixing rods (2) are fixedly mounted on both left and right sides of the shell (1), the number of the shells (1) is two, and the fixing rods (2) are symmetrically connected, and the inner cavity of the shell (1) is provided with a sealing mechanism (3), and the sealing mechanism (3) comprises a handle (301), a rotating shaft (302), a first hard spring (303), a connecting block (304), a first connecting groove (305), a second connecting groove (306), a partition plate (307), a second hard spring (308) and a clamping plate (309).

2. A shield machine propulsion cylinder guide sleeve sealing structure according to claim 1, characterized in that: The handle (301) is arranged in the inner cavity of the shell (1), the first hard spring (303) is arranged on the inner side of the handle (301), the connecting block (304) is arranged at one end of the first hard spring (303) away from the handle (301), the first connecting groove (305) is opened on the left and right sides of the handle (301), the outer side of the rotating shaft (302) is movably connected to the inner side of the first connecting groove (305), the second connecting groove (306) is opened on the left and right sides of the connecting block (304), the second hard spring (308) is fixedly connected to the left and right sides of the inner cavity of the shell (1), and the clamping plate (309) is fixedly connected to the inner side of the connecting block (304).

3. The shield machine propulsion cylinder guide sleeve sealing structure according to claim 1, characterized in that: The partition (307) is fixedly connected to the left and right sides of the handle (301), and the other end of the second hard spring (308) is fixedly connected to the surface of the partition (307).

4. The shield machine propulsion cylinder guide sleeve sealing structure according to claim 1, characterized in that: A sealing gasket (4) is fixedly mounted on the inner side of the clamping plate (309), and the sealing gasket (4) is made of rubber.

5. The shield machine propulsion cylinder guide sleeve sealing structure according to claim 1, characterized in that: A through slot (5) is provided on the inner side of the shell (1), and the connecting block (304) extends to the outer side of the shell (1) through the through slot (5).

6. The shield machine propulsion cylinder guide sleeve sealing structure according to claim 1, characterized in that: Guide rods (7) are fixedly mounted on both the left and right sides of the handle (301), guide holes (6) are opened on both the left and right sides of the inner cavity of the shell (1), and the guide rods (7) are slidably connected to the inner sides of the guide holes (6).

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