Earth pressure shield tail gap measuring device

Abstract

The utility model discloses an earth pressure shield tail gap measuring device, which comprises a first oil cylinder, a second oil cylinder, a second oil cylinder and a shield tail gap measuring device, and is characterized in that the first oil cylinder is connected to an earth pressure shield machine duct piece mounting gripper; the connecting rod is vertically connected to the extension end of the first oil cylinder; the second oil cylinder is connected to the end, away from the first oil cylinder, of the connecting rod, and the second oil cylinder is parallel to the first oil cylinder. According to the earth pressure shield tail gap measuring device, the length of the shield tail gap can be calculated according to the elongation of the second oil cylinder, and the device is very convenient and rapid; and meanwhile, the extension of the second oil cylinder has certain thrust, so that an obstacle in the extension direction of the second oil cylinder can be pushed away, and the problem that a shield tail gap measurement value is blocked by the obstacle to generate deviation is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel excavation construction, and in particular relates to a device for measuring the gap between the tail of an earth pressure shield. Background Art

[0002] The shield machine is a special engineering equipment used in tunnel excavation. During the construction process, the shield machine is pushed forward by the extension and contraction of the thrust cylinder to excavate the tunnel. Due to the complex environmental conditions, the extension length and angle of the cylinder cannot always remain consistent, which easily leads to the space between the inside of the shield machine and the outside of the segment being in a constant change process, that is, the shield tail gap is in a changing state during the shield construction process. When the change in the shield tail gap exceeds the design allowable range, it will cause extrusion between the shield tail and the segment, increase the resistance to excavation, and reduce the excavation speed; in severe cases, it will cause damage to the shield tail and cause tunnel leakage, collapse and other problems. Therefore, before assembling the segments, it is necessary to measure the shield tail gaps at the top, bottom, left and right positions of the previous ring of segments to adjust according to the measured values.

[0003] The traditional method of measuring the shield tail gap is to measure it manually with a ruler. When measuring the shield tail gap at the upper position, the surveyor needs to climb above the shield tail to measure the shield tail gap. The shield tail not only carries mud and gravel, but is also coated with a lubricating layer, which makes the operator's measurement work not only time-consuming and labor-intensive but also prone to accidents.

[0004] In order to improve the measurement efficiency of the shield tail gap, a shield tail gap measurement device and a method thereof are disclosed in a patent application with the authorization announcement number CN105571555B. The measurement device is set at the bottom plate of the jack of the shield tail of the shield machine. When in use, the measuring rod is controlled to touch the pipe segment or the shield tail, and then the measuring rod is driven to rotate by the motor while the encoder is used to obtain the rotation angle of the motor. Finally, the size of the shield tail gap of the shield machine can be obtained by calculation, thereby improving the efficiency and automation of the shield tail gap measurement. However, in such a structure, since the judgment of the measuring rod touching the pipe segment or the shield tail is based on the signal output of the position sensor, when there is a gravel obstruction in front of the measuring rod, it will cause measurement errors.

[0005] Therefore, there is an urgent need for a shield tail gap measuring device for earth pressure shield that can facilitate measurement and reduce the error caused by obstacles. Utility Model Content

[0006] The purpose of the present invention is to solve at least the above-mentioned drawbacks and provide advantages which will be described later.

[0007] In order to achieve these purposes and other advantages of the utility model, a device for measuring the gap between the tail of an earth pressure shield is provided, comprising a first oil cylinder, a connecting rod and a second oil cylinder.

[0008] The first oil cylinder is connected to the segment installation gripper of the earth pressure shield machine.

[0009] A connecting rod is vertically connected to the extended end of the first oil cylinder.

[0010] The second oil cylinder is connected to an end of the connecting rod away from the first oil cylinder, and the second oil cylinder is parallel to the first oil cylinder.

[0011] In the above scheme, when measuring the shield tail gap, the extension of the second oil cylinder is controlled so that the second oil cylinder abuts against the outer wall of the shield machine. The length of the shield tail gap can be calculated according to the extension of the second oil cylinder, which is very convenient and quick.

[0012] Secondly, since the extension of the second oil cylinder has a certain thrust, the obstacles in the extension direction of the second oil cylinder can be pushed away to avoid the problem of deviation of the shield tail gap measurement value due to obstruction by obstacles.

[0013] Preferably, the connecting rod is replaced with a flip structure, and the flip structure includes: a gear rod, a rack and a support column.

[0014] The rack is connected to the extended end of the first oil cylinder.

[0015] The gear rod comprises a gear portion and a rod portion, the gear portion is cooperatively connected with the rack; and the rod portion is connected with the second oil cylinder.

[0016] The first end of the support column is connected to the segment installation gripper of the earth pressure shield machine, and the second end is connected to the rod portion of the gear rod. The support column is movably connected to the gear rod.

[0017] In the above scheme, the connecting rod is replaced with a flip structure. When the shield tail gap measurement at one position is completed and transferred to the next measurement point, the second oil cylinder can be flipped away from the shield machine, thereby avoiding friction and collision between the measuring device and the shield machine during movement. Specifically, after the shield tail gap measurement at one position is completed, the second oil cylinder is retracted, and at the same time, the hollow ear first oil cylinder is retracted to flip the gear rod upward, thereby flipping the second oil cylinder away from the shield machine.

[0018] Preferably, the earth pressure shield tail gap measuring device also includes a rodless cylinder and a verticality deviation detector; the rodless cylinder is vertically connected to the side of the connecting rod close to the pipe segment; or the rodless cylinder is vertically connected to the side of the gear rod close to the pipe segment in the working state, and the verticality deviation detector is connected to one end of the rodless cylinder, and the detection direction of the verticality deviation detector is parallel to the extension direction of the second oil cylinder.

[0019] In the above scheme, a verticality deviation detector is set up to determine whether the rodless cylinder is perpendicular to the pipe segment. When the rodless cylinder is not perpendicular to the pipe segment, the extension or contraction of the first cylinder is adjusted to keep the rodless cylinder perpendicular to the pipe segment, thereby ensuring that the second cylinder is perpendicular to the pipe segment and avoiding deviation in the shield tail gap measurement value.

[0020] Preferably, the gear covering length of the gear portion is greater than half of the circumference of the gear portion.

[0021] Preferably, the extended end of the second oil cylinder is in a convex spherical or hemispherical shape.

[0022] In the above scheme, the shape of the extending end of the second cylinder is improved so that when the second cylinder is extended and encounters obstacles such as gravel, the obstacles can be pushed away better, thereby enabling the second cylinder to extend to abut the outer wall of the shield machine, thereby avoiding the problem of deviation in the shield tail gap measurement value due to obstruction by obstacles.

[0023] Preferably, the length of the rodless cylinder is the distance between the connecting rod or the gear rod and the pipe segment in a working state.

[0024] Preferably, a buffer gasket is connected to one end of the rodless cylinder close to the pipe segment in the working state.

[0025] Advantages of the utility model:

[0026] Firstly, when measuring the shield tail gap, the earth pressure shield tail gap measuring device of the utility model controls the extension of the second oil cylinder so that the second oil cylinder abuts against the outer wall of the shield machine, and the length of the shield tail gap can be calculated according to the extension of the second oil cylinder, which is very convenient and quick.

[0027] Secondly, in the earth pressure shield tail gap measuring device of the utility model, since the extension of the second oil cylinder has a certain thrust, obstacles in the extension direction of the second oil cylinder can be pushed away, so as to avoid the problem of deviation in the shield tail gap measurement value due to obstruction by obstacles. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a shield tail gap measuring device for an earth pressure shield according to the utility model;

[0029] Figure 2 It is another structural schematic diagram of the earth pressure shield tail gap measuring device of the utility model;

[0030] Figure 3 It is a schematic diagram of the structure of the earth pressure shield tail gap measuring device of the utility model turned upward;

[0031] Figure 4The present invention is another structural schematic diagram of the earth pressure shield tail gap measuring device.

[0032] Among them, the earth pressure shield machine segment installation grab A, the length a of the second cylinder protruding from the segment, the length b of the second cylinder extending out, the segment B, the earth pressure shield machine C, the first cylinder 1, the connecting rod 2, the second cylinder 3, the flip structure 4, the gear rod 41, the gear part 411, the rod part 412, the rack 42, the support column 43, the rodless cylinder 5, and the verticality deviation detector 6. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below so that those skilled in the art can implement the invention with reference to the description.

[0034] Example

[0035] Figure 1 The utility model is shown in an implementation form, that is, a device for measuring the gap between the tail of an earth pressure shield, comprising a first oil cylinder 1, a connecting rod 2 and a second oil cylinder 3.

[0036] The first oil cylinder 1 is connected to the segment installation gripper A of the earth pressure shield machine.

[0037] A connecting rod 2 is vertically connected to the extended end of the first oil cylinder 1 .

[0038] The second oil cylinder 3 is connected to one end of the connecting rod 2 away from the first oil cylinder 1 , and the second oil cylinder 3 is parallel to the first oil cylinder 1 .

[0039] This implementation scheme, specifically, when measuring the shield tail gap, controls the extension of the second oil cylinder so that the second oil cylinder abuts against the outer wall of the shield machine, and the length of the shield tail gap can be calculated according to the extension of the second oil cylinder, which is very convenient and quick. Among them, the shield tail gap = the length a of the second oil cylinder protruding from the pipe segment + the length b of the second oil cylinder extending out - the thickness of the pipe segment. Secondly, because the extension of the second oil cylinder has a certain thrust, it can push away obstacles in the extension direction of the second oil cylinder, so as to avoid the problem of deviation of the shield tail gap measurement value due to the obstruction of obstacles.

[0040] Further, such as Figure 2-3 As shown, the connecting rod 2 is replaced by a flip structure 4 , and the flip structure 4 includes: a gear rod 41 , a rack 42 and a support column 43 .

[0041] The rack 42 is connected to the extended end of the first oil cylinder 1 .

[0042] The gear rod 41 includes a gear portion 411 and a rod portion 412 . The gear portion 412 is cooperatively connected with the rack 42 ; and the rod portion 412 is connected with the second oil cylinder 3 .

[0043] The first end of the support column 43 is connected to the segment installation gripper A of the earth pressure shield machine, and the second end is connected to the rod portion 412 of the gear rod 41 . The support column 43 is movably connected to the gear rod 41 .

[0044] In this implementation, the connecting rod is replaced with a flip structure. When the shield tail gap measurement at one position is completed and transferred to the next measurement point, the second oil cylinder can be flipped away from the shield machine, thereby avoiding friction and collision between the measuring device and the shield machine during movement. Specifically, after the shield tail gap measurement at one position is completed, the second oil cylinder is retracted, and at the same time, the hollow ear first oil cylinder is retracted to flip the gear rod upward, thereby flipping the second oil cylinder away from the shield machine.

[0045] Further, such as Figure 4 As shown, the earth pressure shield tail gap measuring device also includes a rodless cylinder 5 and a verticality deviation detector 6; the rodless cylinder 5 is vertically connected to the side of the connecting rod 2 close to the pipe segment; or the rodless cylinder 5 is vertically connected to the side of the gear rod 41 close to the pipe segment in the working state. The verticality deviation detector 6 is connected to one end of the rodless cylinder 5, and the detection direction of the verticality deviation detector 6 is parallel to the extension direction of the second oil cylinder 3.

[0046] This implementation scheme sets up a verticality deviation detector to determine whether the rodless cylinder is perpendicular to the pipe segment. When the rodless cylinder is not perpendicular to the pipe segment, it is adjusted by adjusting the extension or contraction of the first cylinder to keep the rodless cylinder perpendicular to the pipe segment, thereby ensuring that the second cylinder is perpendicular to the pipe segment and avoiding deviation in the shield tail gap measurement value.

[0047] Furthermore, the gear covering length of the gear portion 411 is greater than half of the circumference of the gear portion 411 .

[0048] Furthermore, the extended end of the second oil cylinder 3 is a convex spherical or hemispherical shape.

[0049] In this implementation, the shape of the extending end of the second cylinder is improved so that when the second cylinder is extended and encounters obstacles such as gravel, the obstacles can be pushed away better, thereby allowing the second cylinder to extend to abut the outer wall of the shield machine, thereby avoiding the problem of deviation in the shield tail gap measurement value due to obstruction by obstacles.

[0050] Furthermore, the length of the rodless cylinder 5 is the distance between the connecting rod 2 or the gear rod 41 and the pipe segment in the working state.

[0051] Furthermore, a buffer gasket is connected to one end of the rodless cylinder 5 close to the pipe segment B in the working state.

[0052] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to specific details.

Claims

1. Earth pressure shield tail gap measuring device, characterized in that: include: A first oil cylinder connected to a segment installation gripper of the earth pressure shield machine; A connecting rod vertically connected to the extended end of the first oil cylinder; The second oil cylinder is connected to an end of the connecting rod away from the first oil cylinder, and the second oil cylinder is parallel to the first oil cylinder.

2. The earth pressure shield tail gap measuring device according to claim 1, characterized in that: The connecting rod is replaced with a flip structure, wherein the flip structure includes: a gear rod, a rack and a support column; The rack is connected to the extended end of the first oil cylinder; The gear rod comprises a gear part and a rod part, the gear part is connected with the rack in cooperation; the rod part is connected with the second oil cylinder; The first end of the support column is connected to the segment installation gripper of the earth pressure shield machine, and the second end is connected to the rod portion of the gear rod. The support column is movably connected to the gear rod.

3. The earth pressure shield tail gap measuring device according to claim 2, characterized in that: Also included are a rodless cylinder and a verticality deviation detector; The rodless cylinder is vertically connected to the side of the connecting rod close to the pipe segment; or the rodless cylinder is vertically connected to the side of the gear rod close to the pipe segment in the working state; The verticality deviation detector is connected to the rodless cylinder, and the detection direction of the verticality deviation detector is parallel to the extension direction of the second oil cylinder.

4. The earth pressure shield tail gap measuring device according to claim 2, characterized in that: The gear covering length of the gear portion is greater than half of the circumference of the gear portion.

5. The earth pressure shield tail gap measuring device according to claim 1, characterized in that: The extended end of the second oil cylinder is in a convex spherical or hemispherical shape.

6. The earth pressure shield tail gap measuring device according to claim 3, characterized in that: The length of the rodless cylinder is the distance between the connecting rod or the gear rod and the pipe segment in the working state.

7. The earth pressure shield tail gap measuring device according to claim 3, characterized in that: The rodless cylinder is connected with a buffer gasket at one end close to the pipe segment in the working state.

Images