A shield machine starting reaction frame

Abstract

The present invention relates to a starting reaction frame for a shield machine, comprising a fixed frame and a movable frame, wherein the fixed frame and the movable frame are connected via a connecting bolt shaft, wherein the connecting bolt shaft comprises a large-diameter threaded section at the rear end and a small-diameter threaded section at the front end, and each connecting bolt shaft is equipped with two large nuts and one small nut. A set of adjustment components are respectively provided at the four corners of the fixed frame and the movable frame, wherein the adjustment components comprise a fixed adjustment block and a floating adjustment block, wherein the fixed adjustment block is mounted on the fixed frame, and one end of the floating adjustment block is connected to the fixed frame via a ball joint, and an adjustment device for pushing the free end of the floating adjustment block to move is provided between the fixed adjustment block and the floating adjustment block. On the one hand, the reaction frame of the present invention facilitates adjustment of the verticality of the supporting surface, and can cope with changes in the posture of the fixed frame at any time during the starting process of the shield machine; on the other hand, the adjustment components are relatively strong and are not easily damaged during the starting process, thereby affecting the starting progress.

Description

Technical Field

[0001] The present invention relates to the field of shield machines, and in particular to a starting reaction frame for a shield machine. Background Art

[0002] The shield tunnel construction technology has been widely used in the domestic subway market, municipal water supply tunnels, power tunnels and other fields. An extremely important item in its construction quality control is to control the deviation value between the tunnel axis and the design axis. Therefore, the shield machine posture control is the key in the entire shield tunnel construction process, and the shield machine posture control is particularly important in the shield machine's initial exit stage. In order to accurately achieve the shield machine posture control, it is necessary to keep the shield machine's reaction frame vertical, so as to ensure the vertical line of the reaction frame support surface that provides the initial support force to the shield machine. When arranging the reaction frame before starting, it is necessary to adjust it multiple times to ensure its verticality. When the shield machine moves forward step by step, the force posture of the reaction frame will also change, affecting the reaction force it provides to the shield machine. In view of this, the present invention is proposed. Summary of the Invention

[0003] The purpose of the present invention is to provide a shield machine starting reaction frame to solve the technical problem in the prior art that the supporting surface of the reaction frame of the shield machine in the starting stage is difficult to maintain a vertical state.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A starting reaction frame of a shield machine, comprising a fixed frame body and a movable frame body;

[0006] The fixed frame body and the movable frame body are connected by a connecting bolt shaft, and bolt through holes for connecting the connecting bolt shaft are correspondingly opened on the fixed frame body and the movable frame body. The connecting bolt shaft includes a large-diameter threaded section at the rear end and a small-diameter threaded section at the front end. The size of the large-diameter threaded section matches the size of the bolt through hole. A large nut is installed on each side of the movable frame body on the large-diameter threaded section, and a small nut is installed on the small-diameter threaded section. The outer diameter of the small nut is larger than the outer diameter of the bolt through hole.

[0007] A group of adjustment components are provided at each of the four corners of the fixed frame and the movable frame, and the adjustment components include a fixed adjustment block and a floating adjustment block. The fixed adjustment block is installed on the fixed frame, and one end of the floating adjustment block is connected to the fixed frame through a ball joint. An adjustment device for pushing the free end of the floating adjustment block to move is provided between the fixed adjustment block and the floating adjustment block.

[0008] Furthermore, the adjustment component includes a bottom box with an open front end, the rear end of the fixed adjustment block is fixed to the bottom box, the front end of the floating adjustment block protrudes from the bottom box, a wedge-shaped pad is provided between the fixed adjustment block and the movable adjustment block, and a threaded hole is provided at the corresponding position of the bottom box, and an adjustment bolt for pressing the corresponding end of the wedge-shaped pad is passed through the threaded hole.

[0009] Furthermore, the mating surfaces of the fixed adjustment block and the wedge-shaped pad are inclined surfaces with matching inclinations.

[0010] Furthermore, a set of adjusting bolts is respectively installed on the upper and lower ends of the bottom box.

[0011] Furthermore, the base box is installed on the fixed frame through the adjusting component fixing bolt group, and the wedge-shaped pad and the floating adjusting block are both provided with a long groove extending along the axial direction of the adjusting bolt for the adjusting component fixing bolt group to slide along it, and the width of the long groove on the floating adjusting block is larger than the diameter of the nut in the adjusting component fixing bolt group so that the nut can sink into it.

[0012] Furthermore, the fixed frame includes a frame and diagonal support seats fixed at the four corners of the frame, the front end surface of the diagonal support seat is recessed in the frame, the rear end surface of the bottom box is fixed on the diagonal support seat, and the corners of the bottom box are clamped by the frame.

[0013] Furthermore, the movable frame includes a circular ring-shaped main body, a front plate and a rear plate. The outer contour of the rear plate is adapted to the frame shape of the fixed frame, and the bolt through-holes are opened on the rear plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The reaction frame of the present invention comprises a fixed frame and a movable frame. When the fixed frame tilts and affects the verticality of the support surface, the height of the adjusting component at the corresponding position can be adjusted to adjust the verticality of the support surface at the front end of the movable frame.

[0016] To adjust the height of the adjustment component, the adjusting bolt is turned to move the wedge-shaped spacer, which in turn causes the floating adjustment block, which is spherically connected to the fixed adjustment block, to rise. The rear end of the wedge-shaped spacer aligns with the fixed adjustment block, while the front end aligns with the floating adjustment block. This allows the spacer to be securely supported between the fixed and floating adjustment blocks without being crushed by the massive reverse thrust of the shield machine's advance. This massive reverse thrust is horizontal, while the adjusting bolt primarily bears the small vertical force transmitted by the wedge-shaped spacer, making it less susceptible to damage.

[0017] Therefore, on the one hand, the reaction frame of the present invention is convenient for adjusting the verticality of the support surface, and can respond to the posture changes of the fixed frame at any time during the shield starting process; on the other hand, the adjustment components are relatively strong and are not easily damaged during the starting process and affect the starting progress.

[0018] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The structure of the invention is scientific and reasonable, and it is safe and convenient to use, which provides great help to people. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of an embodiment of a shield machine starting reaction frame of the present invention;

[0021] Figure 2 2. It is a schematic diagram of the three-dimensional structure of the fixed frame;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the connecting bolt shaft;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the regulating component;

[0024] Figure 5 It is a front view of the adjustment component;

[0025] Figure 6 It is a cross-sectional view of the adjusting component in the direction of A;

[0026] In the figure: fixed frame 1, movable frame 2, diagonal support beam 3, connecting bolt shaft 4, adjustment component 5, adjustment component fixing bolt group 6, frame 11, diagonal support seat 12, first bolt through-hole 13, second bolt through-hole 14, bottom box 51, fixed adjustment block 52, floating adjustment block 53, wedge-shaped pad 54, adjustment bolt 55, long slot 56. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Embodiment 1 of a shield machine starting reaction frame of the present invention:

[0029] The shield machine's initial reaction frame consists of a fixed frame 1, a movable frame 2, and a diagonal bracing beam 3. The fixed frame 1 and movable frame 2 are connected by connecting bolts 4. An adjustment component 5 is provided between the fixed frame 1 and movable frame 2. The diagonal bracing beam 3 is installed at the rear end of the fixed frame 1. The lower ends of the diagonal bracing beam 3 and the lower ends of the fixed frame 1 are both anchored to the ground foundation.

[0030] The fixed frame 1 includes a frame 11 and diagonal bracing seats 12 fixed at the four corners of the frame 11. The front end surface of the diagonal bracing seat 12 is recessed in the frame 11. The main frame 11 and the diagonal bracing beam 12 are both formed by welding box beams. The annular body of the movable frame 2 is formed by welding steel plates. After the annular body is welded, the front and rear plates are welded into place. The outer contours of the front and rear plates are generally square, and the inner contours coincide with the inner circumference of the annular body. The front end surface of the front plate contacts the shield machine, forming a support surface.

[0031] The connecting bolt shaft 4 is mounted on the four sides of the fixed frame 1 through first bolt holes 13 on each side. Matching bolt holes are installed on the four sides of the movable frame 2. The connecting bolt shaft 4 includes a large-diameter section 41 and a small-diameter section 42, which cooperate with nuts to connect the fixed frame 1 and the movable frame 2. There are three nuts, two of which are large nuts, matching the dimensions of the large-diameter section 41. One large nut is installed between the fixed frame 1 and the movable frame 2, and the other large nut is installed in front of the movable frame 2. The small nut is sized to match the dimensions of the small-diameter section 42 and is installed on the small-diameter section 42.

[0032] The adapter bolt holes on the four sides of the movable frame 2 are sized to match the large nuts. Normally, both large nuts are tightened on the large diameter section 41 to secure the movable frame 2 to the fixed frame 1. When the position of the movable frame 2 needs to be adjusted, the nut in front of the movable frame 1 is retracted to the small diameter section, and the connecting bolt shaft 4 is moved backward so that the adapter bolt holes 21 are aligned with the small diameter section 42. This ensures that the connecting bolt shaft 4 does not interfere with the non-parallel movement of the movable frame 2 relative to the fixed frame 1.

[0033] Second bolt holes 14 are provided at the four corners of the fixed frame 1, through which the adjustment component 5 is secured at the four corners of the fixed frame 1. The fixed frame 1 includes a bottom box 51 with an open front end. A fixed adjustment block 52 is secured within the bottom box 51. One end of the fixed adjustment block 52 is connected to a floating adjustment block 53 via a ball joint. A wedge-shaped pad 54 is placed between the fixed adjustment block 52 and the floating adjustment block 53. The front end of the floating adjustment block 53 protrudes above the bottom box 51, and the rear end of the movable frame 2 abuts against the front end of the bottom box 51. The mating surfaces of the fixed adjustment block 52 and the wedge-shaped pad 54 are inclined surfaces with matching inclinations. A set of adjustment bolts 55 are mounted at each end of the bottom box 51. The adjustment bolts 55 are threadedly connected to the bottom box 51, and the ends of the adjustment bolts 55 extend into the bottom box 51 to respectively press against the thick and thin ends of the wedge-shaped pad 54.

[0034] Corresponding slots 56 extending along the length of the adjustment bolts are defined on the wedge-shaped spacer 54 and the floating adjustment block 53. Bolt holes are defined on the base box 51 and the fixed adjustment block 52. The adjustment component fixing bolt assembly 6 secures the adjustment component 5 to the fixed frame 1. The width of the slots in the wedge-shaped spacer 54 is no less than the diameter of the screw segments in the adjustment component fixing bolt assembly 6. The width of the slots in the floating adjustment block 53 is greater than the diameter of the nuts in the adjustment component fixing bolt assembly 6 to allow the nuts to sink into the slots.

[0035] In this embodiment, the screw in the adjusting component fixing bolt group 6 is longer, and clearance holes are opened at the four corners of the movable frame 2 at positions corresponding to the adjusting component fixing bolt group 6. The size of the clearance hole is larger than the diameter of the screw segment to ensure that the clearance hole can still allow the screw segment to pass through when the movable frame 2 rotates relative to the fixed frame 1 within a certain range.

[0036] When the lower end of the fixed frame 1 tilts backward, the adjusting component 5 is rotated so that the hinge point of the fixed adjusting block 52 and the floating adjusting block 53 faces upward and the free end of the floating adjusting block 53 faces downward, and the adjusting bolt 55 is rotated to adjust the inclination of the floating adjusting block 53. The ultimate goal is to make the inclination of the upper floating adjusting block 53 consistent with the inclination angle of the fixed frame 1 and to make the front end support point of the lower floating adjusting block 53 and the front end support point of the upper floating adjusting block 53 on the same vertical plane.

[0037] When the upper end of the fixed frame 1 tilts backward, the adjusting component 5 is rotated so that the hinge point of the fixed adjusting block 52 and the floating adjusting block 53 faces downward and the free end of the floating adjusting block 53 faces upward, and the adjusting bolt 55 is rotated to adjust the inclination of the floating adjusting block 53. The ultimate goal is to make the inclination of the lower end floating adjusting block 53 consistent with the inclination angle of the fixed frame 1 and to make the front end support point of the upper end floating adjusting block 53 and the front end support point of the lower end floating adjusting block 53 on the same vertical plane.

[0038] During adjustment of the floating adjustment block 53, the movable frame 2 rotates accordingly to recalibrate verticality. Once the position is adjusted, adjust the two sets of adjustment bolts 55 to limit the vertical displacement of the wedge-shaped spacer 54. Tighten the adjustment component fixing bolts 6 to press the adjustment component 5 against the fixed frame 1. While adjusting the adjustment component 5, adjust the connecting bolt shaft 4 below to prevent it from interfering with the rotation of the floating adjustment block 53.

[0039] The adjusting component 5 can rotate relative to the fixed frame 1. When the floating distance of the floating adjusting block 53 and the translation distance of the wedge-shaped pad 54 remain unchanged, the slope of the wedge-shaped pad 54 can be made smaller, making it stronger and less likely to be crushed.

[0040] The adjustment components 5 on the left and right sides can be adjusted independently. When the left and right sides have different degrees of inclination, the heights of the adjustment components 5 at the four corners can be adjusted separately to better adjust the verticality of the floating frame 1.

[0041] Embodiment 2 of a shield machine starting reaction frame of the present invention:

[0042] The difference between Example 2 and Example 1 is that the installation direction of the adjustment component 5 cannot be adjusted, the rear end face of the bottom box 51 is fixed on the diagonal support seat, the corners of the bottom box 51 are clamped by the frame, and no long grooves are required on the wedge-shaped pad 54 and the floating adjustment block 53.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A starting reaction frame of a shield machine, characterized by: Including fixed frame and movable frame; The fixed frame body and the movable frame body are connected by a connecting bolt shaft, and bolt through holes for connecting the connecting bolt shaft are correspondingly opened on the fixed frame body and the movable frame body. The connecting bolt shaft includes a large-diameter threaded section at the rear end and a small-diameter threaded section at the front end. The size of the large-diameter threaded section matches the size of the bolt through hole. A large nut is installed on each side of the movable frame body on the large-diameter threaded section, and a small nut is installed on the small-diameter threaded section. The outer diameter of the small nut is larger than the outer diameter of the bolt through hole. An adjusting component is provided at each of the four corners of the fixed frame and the movable frame, and the adjusting component includes a fixed adjusting block, a floating adjusting block and a bottom box with an open front end. The rear end of the fixed adjusting block is fixed to the bottom box, and the bottom box is fixed to the fixed frame. One end of the floating adjusting block is connected to the fixed frame through a ball joint, and the front end of the floating adjusting block protrudes from the bottom box. A wedge-shaped pad is provided between the fixed adjusting block and the floating adjusting block, and a threaded hole is provided at the corresponding position of the bottom box, and an adjusting bolt for pressing the corresponding end of the wedge pad is passed through the threaded hole.

2. The starting reaction frame of a shield machine according to claim 1, characterized in that: The matching surfaces of the fixed adjustment block and the wedge-shaped pad are inclined surfaces with matching inclinations.

3. The starting reaction frame of a shield machine according to claim 1, characterized in that: A group of adjusting bolts is respectively installed on the upper and lower ends of the bottom box.

4. The starting reaction frame of a shield machine according to claim 1, characterized in that: The base box is mounted on the fixed frame through an adjusting component fixing bolt group. The wedge-shaped pad and the floating adjusting block are both provided with a long groove extending along the axial direction of the adjusting bolt for the adjusting component fixing bolt group to slide along. The width of the long groove on the floating adjusting block is greater than the diameter of the nut in the adjusting component fixing bolt group so that the nut can sink into it.

5. The starting reaction frame of a shield machine according to claim 1, characterized in that: The fixed frame includes a frame and diagonal support seats fixed at the four corners of the frame. The front end surface of the diagonal support seat is recessed in the frame. The rear end surface of the bottom box is fixed on the diagonal support seat. The corners of the bottom box are clamped by the frame.

6. The starting reaction frame of a shield machine according to any one of claims 1 to 5, characterized in that: The movable frame includes a circular main body, a front plate and a rear plate. The outer contour of the rear plate is adapted to the frame shape of the fixed frame. The bolt through holes are provided on the rear plate.

Images