Shield overbreak cutter protection device

Abstract

The utility model relates to the technical field of overbreak cutter protection, in particular to a shield overbreak cutter protection device which comprises a shield tunneling machine shell, a shield tunneling machine cutterhead is arranged on the surface of the shield tunneling machine shell, a cutter bin is arranged on the surface of the shield tunneling machine cutterhead, an overbreak cutter body is arranged on the cutter bin, a sealing check ring is arranged on the overbreak cutter body, and the shield tunneling machine cutterhead is arranged on the shield tunneling machine shell. A protection mechanism is arranged on the surface of the shield tunneling machine shell upwards and comprises a guide bottom frame, and the guide bottom frame is fixedly connected to the surface of the shield tunneling machine shell. According to the utility model, the distance between the arc-shaped detection baffle plate and the over cutter body is changed, so that the arc-shaped detection baffle plate can form ideal intercepting and guiding functions, the cutting efficiency of the over cutter body on a tunnel is guaranteed, and the stability of the excavation diameter is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of over-digging cutter protection, in particular to a shield over-digging cutter protection device. Background Art

[0002] During underground tunnel construction, due to the great depth of burial, the shield must continuously withstand the pressure of the surrounding soil and groundwater. The cutterhead, a key component, is responsible for excavating and stabilizing the face rock and soil, as well as mixing the soil. During construction, shield machines often encounter different types of composite strata, such as silt, sand, gravel, clay, and soft rock. This subjects the equipment to complex mechanical forces and creates a relatively harsh working environment.

[0003] When tunneling in a curve, correcting deviations, or entering or exiting reinforcements, the shield machine needs to excavate a space slightly larger than the shield diameter to allow for advancement. The use of overbreak cutters is particularly important in these situations. By radially extending and retracting the overbreak cutters from the spoke ends, the amount and range of overbreak can be controlled. With minimal disturbance to the surrounding soil, overbreak is performed to create the required space, enabling the shield machine to turn or correct deviations.

[0004] During normal advancement, the over-excavation cutter needs to be retracted to reduce the amount of over-excavation and prevent the overall posture of the shield machine from sinking. Due to the harsh working environment of the cutterhead and the fact that most projects do not load-test the over-excavation cutter before starting, it is difficult to ensure the stability of the excavation diameter after the over-excavation cutter enters the reinforcement body, which may cause the shield tail of the shield machine to become stuck or the overall posture of the shield machine to sink. To ensure the normal advancement of the shield machine, the existing shield over-excavation cutter protection device uses an arc-shaped baffle to detect the working status of the over-excavation cutter during the profiling process, thereby ensuring that the over-excavation cutter can also play the role of widening the excavation diameter normally under the load rotation state. However, the arc baffle on the existing shield over-excavation cutter protection device cannot adjust the height of the arc baffle accordingly, resulting in the arc baffle being unable to achieve the ideal interception and guidance effect, resulting in reduced cutting efficiency of the over-excavation cutter during operation, which in turn affects the stability of the excavation diameter. Utility Model Content

[0005] The purpose of the utility model is to provide a shield over-excavation cutter protection device to solve the problem proposed in the above background technology that the arc baffle on the existing shield over-excavation cutter protection device cannot adjust the height of the arc baffle accordingly, resulting in the arc baffle being unable to form an ideal interception and guiding effect, resulting in a decrease in the cutting efficiency of the over-excavation cutter during operation, thereby affecting the stability of the excavation diameter.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a shield over-excavation blade protection device, comprising a shield machine casing, a shield machine cutterhead provided on the surface of the shield machine casing, a cutter magazine provided on the surface of the shield machine cutterhead, an over-excavation blade body provided on the cutter magazine, a sealing retaining ring provided on the over-excavation blade body, a protection mechanism provided on the surface of the shield machine casing, the protection mechanism comprising a guide base frame, the guide base frame being fixedly connected to the surface of the shield machine casing, a support base plate being slidably connected to the surface of the guide base frame, a connecting plate being fixedly connected to the surface of the support base plate, an arc-shaped detection baffle being fixedly connected to the surface of the connecting plate, a fixing frame being fixedly connected to the surface of the shield machine casing, a screw rod being rotatably connected to the surface of the fixing frame, a knob being fixedly connected to the surface of the screw rod, a square nut being threadedly connected to the surface of the screw rod, and the square nut being fixedly connected to the surface of the support base plate.

[0007] Preferably, three groups of sealing rings are provided, and the sealing rings seal the super-digging cutter body in the cutter chamber, and the super-digging cutter body can be extended from and retracted into the cutter chamber.

[0008] Preferably, two groups of guide base frames are provided, and the two groups of guide base frames are parallel to each other, and the two groups of guide base frames are perpendicular to the horizontal plane.

[0009] Preferably, a guide groove is provided on the surface of the guide base, the support base slides on the guide groove of the guide base, and the connecting plate slides on the guide groove of the guide base through the support base.

[0010] Preferably, the connecting plate and the arc-shaped detection baffle are both arc-shaped, and the connecting plate drives the arc-shaped detection baffle to rise and fall on the surface of the shield machine cutter head.

[0011] Preferably, the fixing frame is in a "U" shape, and the screw rod is driven to rotate by a knob. During the rotation process, the screw rod drives the square nut to slide and rise and fall on the surface of the fixing frame.

[0012] Preferably, the square nut is fixedly connected to the bottom of the supporting base plate, and the square nut drives the connecting plate and the arc-shaped detection baffle to rise and fall synchronously through the supporting base plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. This protection device drives the screw to rotate on the surface of the fixed frame through the knob. The screw drives the square nut to slide and rise and fall on the surface of the fixed frame through rotation. The supporting base plate rises and falls on the shield machine cutter head through the guide base. The square nut drives the connecting plate and the arc-shaped detection baffle to rise and fall on the shield machine cutter head through the supporting base plate, thereby changing the distance between the arc-shaped detection baffle and the shield machine cutter head, and then changing the distance between the arc-shaped detection baffle and the over-excavation cutter body, so that the arc-shaped detection baffle can form an ideal interception and guidance effect, ensuring the cutting efficiency of the over-excavation cutter body in the tunnel, and thus ensuring the stability of the excavation diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a partial schematic diagram of the front view of the structure of the super-digging cutter body of the utility model;

[0017] Figure 3 It is a partial schematic diagram of the structure of the utility model from the side;

[0018] Figure 4 For this utility model Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 5 It is a partial schematic diagram of a back view of the protective mechanism of the utility model.

[0020] In the figure: 1. Shield machine casing; 11. Shield machine cutterhead; 2. Cutter magazine; 21. Super-excavation cutter body; 22. Sealing ring; 3. Guide base; 31. Support base plate; 32. Connecting plate; 33. Arc detection baffle; 34. Fixing frame; 35. Screw; 36. Knob; 37. Square nut. DETAILED DESCRIPTION

[0021] See also Figure 1-5 , an embodiment provided by the utility model:

[0022] A shield over-digging blade protection device: comprising a shield machine housing 1, a shield machine cutterhead 11 is provided on the surface of the shield machine housing 1, a cutter magazine 2 is provided on the surface of the shield machine cutterhead 11, an over-digging blade body 21 is provided on the cutter magazine 2, a sealing retainer ring 22 is provided on the over-digging blade body 21, a protection mechanism is provided on the surface of the shield machine housing 1, the protection mechanism comprises a guide chassis 3, the guide chassis 3 is fixedly connected to the surface of the shield machine housing 1, a support base plate 31 is slidably connected to the surface of the guide chassis 3, a connecting plate 32 is fixedly connected to the surface of the supporting base plate 31, and an arc is fixedly connected to the surface of the connecting plate 32. A curved detection baffle 33 is provided, and a fixing bracket 34 is fixedly connected to the surface of the shield machine casing 1. A screw rod 35 is rotatably connected to the surface of the fixing bracket 34. A knob 36 is fixedly connected to the surface of the screw rod 35. A square nut 37 is threadedly connected to the surface of the screw rod 35. The square nut 37 is fixedly connected to the surface of the supporting base plate 31. The protective mechanism can adjust the height of the arc-shaped detection baffle 33 on the shield machine cutter head 11, so that the arc-shaped detection baffle 33 can form an ideal interception and guiding effect, thereby ensuring the cutting efficiency of the super-excavation cutter body 21 on the tunnel, and thus ensuring the stability of the excavation diameter.

[0023] Furthermore, three groups of sealing retaining rings 22 are provided, and the sealing retaining rings 22 seal the super-digging cutter body 21 in the cutter chamber 2. The three groups of sealing retaining rings 22 greatly improve the overall sealing effect of the super-digging cutter body 21, thereby greatly reducing the number of inspections and maintenance, and increasing the service life of the arc detection baffle 33. The super-digging cutter body 21 can be extended and retracted from the cutter chamber 2, which facilitates the arc detection baffle 33 to provide a resistance to the super-digging cutter body 21, similar to the working state of a shield machine in the soil layer. The real-time data of pressure and stroke fed back to the display screen of the operating room by the auxiliary system of the super-digging cutter body 21 is observed to determine whether the actual stroke of the super-digging cutter body 21 is consistent with the preset stroke, thereby testing the load of the super-digging cutter body 21.

[0024] Furthermore, two groups of guide frames 3 are provided, and the two groups of guide frames 3 are parallel to each other and perpendicular to the horizontal plane, so that the guide frames 3 can enable the support base plate 31 to rise and fall horizontally on the guide frames 3 .

[0025] Furthermore, a guide groove is provided on the surface of the guide base 3, the support base plate 31 slides on the guide groove of the guide base 3, and the connecting plate 32 slides on the guide groove of the guide base 3 through the support base plate 31. The bottom of the support base plate 31 is rectangular and the top is fan-shaped. The bottom of the support base plate 31 slides on the guide base 3, and the top of the support base plate 31 is used to drive the connecting plate 32 to rise and fall.

[0026] Furthermore, the connecting plate 32 and the arc-shaped detection baffle 33 are both arc-shaped. The connecting plate 32 drives the arc-shaped detection baffle 33 to rise and fall on the surface of the shield machine cutter head 11. The arc-shaped detection baffle 33 is located directly above the super-digging cutter body 21 and is used to protect and detect the super-digging cutter body 21.

[0027] Furthermore, the fixing frame 34 is in a "U" shape, and the screw rod 35 is driven to rotate by the knob 36. During the rotation process, the screw rod 35 drives the square nut 37 to slide and rise and fall on the surface of the fixing frame 34. The lifting height of the square nut 37 is limited by the fixing frame 34, so that the square nut 37 can be adjusted to a moving height on the shield machine casing 1.

[0028] Furthermore, the square nut 37 is fixedly connected to the bottom of the support base plate 31. The square nut 37 drives the connecting plate 32 and the arc detection baffle 33 to rise and fall synchronously through the support base plate 31, thereby changing the distance between the arc detection baffle 33 and the shield machine cutter head 11, and then changing the distance between the arc detection baffle 33 and the super-excavation cutter body 21, thereby improving the flexibility of use of the arc detection baffle 33.

[0029] Working principle: The screw rod 35 is driven to rotate on the surface of the fixed frame 34 by the knob 36. The screw rod 35 drives the square nut 37 to slide and rise and fall on the surface of the fixed frame 34 through rotation. The support base plate 31 is lifted and lowered on the shield machine cutter head 11 through the guide base 3. The square nut 37 drives the connecting plate 32 and the arc-shaped detection baffle 33 to rise and fall on the shield machine cutter head 11 through the support base plate 31, thereby changing the distance between the arc-shaped detection baffle 33 and the shield machine cutter head 11, and then changing the distance between the arc-shaped detection baffle 33 and the super-excavation cutter body 21, so that the arc-shaped detection baffle 33 can form an ideal interception and guiding effect, ensuring the cutting efficiency of the super-excavation cutter body 21 on the tunnel, and then ensuring the stability of the excavation diameter.

Claims

1. A shield over-excavation cutter protection device, characterized by: It includes a shield machine shell, a shield machine cutterhead is provided on the surface of the shield machine shell, a cutter magazine is provided on the surface of the shield machine cutterhead, an over-excavation cutter body is provided on the cutter magazine, a sealing retaining ring is provided on the over-excavation cutter body, a protection mechanism is provided on the surface of the shield machine shell, the protection mechanism includes a guide base frame, the guide base frame is fixedly connected to the surface of the shield machine shell, a support base plate is slidably connected to the surface of the guide base frame, a connecting plate is fixedly connected to the surface of the support base plate, an arc-shaped detection baffle is fixedly connected to the surface of the connecting plate, a fixing frame is fixedly connected to the surface of the shield machine shell, a screw rod is rotatably connected to the surface of the fixing frame, a knob is fixedly connected to the surface of the screw rod, a square nut is threadedly connected to the surface of the screw rod, and the square nut is fixedly connected to the surface of the support base plate.

2. A shield over-excavation cutter protection device according to claim 1, characterized in that: The sealing retaining rings are provided in three groups, and the sealing retaining rings seal the super-digging cutter body in the cutter chamber. The super-digging cutter body can be extended from and retracted to the cutter chamber.

3. A shield over-excavation cutter protection device according to claim 1, characterized in that: The guide base frames are provided in two groups, and the two groups of guide base frames are parallel to each other and perpendicular to the horizontal plane.

4. A shield over-excavation cutter protection device according to claim 3, characterized in that: A guide groove is provided on the surface of the guide base frame, the support base plate slides on the guide groove of the guide base frame, and the connecting plate slides on the guide groove of the guide base frame through the support base plate.

5. A shield over-excavation cutter protection device according to claim 4, characterized in that: The connecting plate and the arc-shaped detection baffle are both in an arc shape, and the connecting plate drives the arc-shaped detection baffle to rise and fall on the surface of the shield machine cutter head.

6. A shield over-excavation cutter protection device according to claim 1, characterized in that: The fixing frame is in a "U" shape, and the screw rod is driven to rotate by a knob. During the rotation process, the screw rod drives the square nut to slide and rise and fall on the surface of the fixing frame.

7. A shield over-excavation cutter protection device according to claim 6, characterized in that: The square nut is fixedly connected to the bottom of the supporting base plate, and the square nut drives the connecting plate and the arc-shaped detection baffle to rise and fall synchronously through the supporting base plate.

Images