Anti-retreating device for normal-pressure tool changing device and tool disc

Abstract

The utility model discloses an anti-retreating device for a normal-pressure tool changer and a cutterhead. The problem that in the prior art, a normal-pressure tool changer retreats and leaks slurry is solved. The anti-retreating device comprises a pressing block base fixed to the cutterhead structure, an anti-retreating pressing block is detachably arranged on the pressing block base, the anti-retreating pressing block is clamped and fixed to the cutterhead fixing base, and the anti-retreating effect of the cutterhead fixing base is effectively achieved. When the tool is replaced, the anti-retreating pressing block is detached from the pressing block base. The anti-retreating device for the normal-pressure tool changing device is simple in structure and ingenious in design, and the problem that the normal-pressure tool changing device falls off due to looseness of a bolt is effectively solved; a gap is reserved between the anti-retreating pressing block and the cutterhead fixing base and plays a role in buffering when the anti-retreating pressing block falls off, and meanwhile leakage slurry can be conveniently found by maintenance personnel in time. According to the cutterhead adopting the anti-retreating device, the construction safety and the construction efficiency are further improved, and the cutterhead is adaptive to the tool changing space, convenient to disassemble and maintain and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of shield cutter discs, in particular to an anti-retraction device and a cutter disc for a normal pressure cutter changing device. Background Art

[0002] Normal-pressure cutterheads are generally in a working environment of high water pressure and great burial depth, and the cutterhead is in direct contact with the high water pressure environment. During the rotation and cutting process of the cutterhead, the normal-pressure tool changing device is fixed with bolts to the fixed seat and the normal-pressure tool changing device on the structural member, and there is no bolt connection between the fixed seat and the normal-pressure tool changing device. If the bolts are loose or broken, there is a risk of the normal-pressure tool changing device loosening or even falling off, which will eventually lead to slurry leakage from the cutterhead, posing a major safety hazard to the lives of personnel and equipment. Therefore, it is of great significance to adopt an anti-retreat protection device for the normal-pressure tool changing device.

[0003] Currently, there are few patents related to the anti-retreat of normal pressure tool changing devices. A Chinese patent with publication number CN 216305924 U mentions a normal pressure tool changing device and a shield machine using the normal pressure tool changing device. In this patent, a method for preventing the retreat of a roller cutter drum is involved, which does not solve the anti-retreat risk of the normal pressure tool changing device. Therefore, it is necessary to design an anti-retreat structure for the device, and considering the space for tool changing, ease of disassembly and maintenance must also be taken into consideration. Utility Model Content

[0004] In view of the deficiencies in the above-mentioned background technology, the utility model proposes an anti-retreat device and a cutter disc for a normal pressure tool changing device, which solves the problem of slurry leakage during retreat of the normal pressure tool changing device in the prior art.

[0005] The technical solution of the utility model is implemented as follows: an anti-retraction device for a normal pressure tool changing device includes a pressure block base fixed on a tool disc structure, a removable anti-retraction pressure block is provided on the pressure block base, and the anti-retraction pressure block is clamped on a tool disc fixing seat to effectively prevent the tool disc fixing seat from retraction. When changing the tool, the anti-retraction pressure block can be removed from the pressure block base.

[0006] Further preferably, the anti-retreat pressure block is an L-shaped block, the vertical beam portion of the L-shaped block is detachably connected to the pressure block base, and the horizontal beam portion of the L-shaped block is clamped and matched with the cutter disc fixing seat; the purpose of anti-retreat is achieved.

[0007] It is further preferred that a gap is left between the crossbeam portion of the L-shaped block and the cutter disc fixing seat so that leakage can be detected and repaired in time, and the anti-retreat device can be disassembled, inspected and replaced at any time.

[0008] Further preferably, the pressure block base is a wedge-shaped block, the bottom surface of the wedge-shaped block is a horizontal plane, and an avoidance surface is provided on the side of the wedge-shaped block close to the cutter disc fixing seat. The horizontal plane and the avoidance surface are arranged vertically so as to fit with the cutter barrel in the cutter disc structure and adapt to the cutter changing space.

[0009] Further preferably, an assembly groove is provided at the bottom of the anti-retraction pressure block, and the upper part of the pressure block base is plugged into and matched with the assembly groove, thereby improving the assembly efficiency and connection firmness of the two.

[0010] Further preferably, the end of the horizontal beam of the L-shaped block is tightly matched with the top of the cutter head fixing seat. In a preferred solution, a flange is fixedly provided at the end of the vertical beam of the L-shaped block, the connecting surface between the pressing block base and the L-shaped block is an inclined surface, the inclined surface is provided with an inclined threaded hole, and the flange is connected to the pressing block base through a first bolt matched with the inclined threaded hole.

[0011] Further preferably, the briquette base is welded to the cutter disc structure, and bolts or other fixing methods may also be used to ensure the firmness of the briquette bottom.

[0012] Further preferably, a stud is provided at the bottom of the anti-backward pressure block, and the stud cooperates with a threaded hole provided on the pressure block base to achieve a detachable connection between the anti-backward pressure block and the pressure block base.

[0013] Further preferably, both the pressure block base and the anti-backward pressure block are provided with transverse pin holes, and the anti-backward pressure block and the pressure block base are detachably connected by a pin shaft matched with the transverse pin hole.

[0014] Further preferably, a vertical threaded hole is provided on the pressure block base, a vertical through hole is provided on the anti-backward pressure block, a fastening bolt is passed through the vertical through hole, and the fastening bolt cooperates with the vertical threaded hole to realize a detachable connection between the anti-backward pressure block and the pressure block base.

[0015] A cutter disc comprises the anti-retraction device for a normal pressure cutter changing device. The device does not need to be fixed on the cutter disc structure for a long time, which is convenient for maintenance of the device.

[0016] The beneficial effects of the utility model are as follows: the anti-recoil device for the normal pressure tool changer of the utility model has a simple structure and an ingenious design, which effectively avoids the problem of the normal pressure tool changer falling off due to loose bolts; a gap is left between the anti-recoil pressure block of the utility model and the cutter disc fixing seat, which acts as a buffer when it falls off, and at the same time, the leakage of slurry is easy for maintenance personnel to find in time. The cutter disc using the anti-recoil device further improves the construction safety and efficiency, and is adapted to the tool change space, easy to disassemble and maintain, and has high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the assembly state of the utility model.

[0019] Figure 2 This is a schematic diagram of the tool changing state of the utility model in Example 2.

[0020] Figure 3 This is a schematic diagram of the normal assembly state of the utility model in Example 3.

[0021] Figure 4 This is a schematic diagram of the tool changing state of Example 3 of the utility model.

[0022] Figure 5 This is a schematic diagram of the pressure block base and the anti-retraction pressure block structure in Example 3.

[0023] Figure 6 This is a schematic diagram of the assembly state of the pressure block base and the anti-retraction pressure block structure in Example 5. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1 As shown, Example 1, an anti-retreat device for a normal pressure tool changing device, includes a pressure block base 1 fixed on a cutter disc structure 5. As a preferred embodiment, the pressure block base 1 is welded to the cutter disc structure 5 to ensure the firmness of the pressure block base 1. According to needs or working conditions, the pressure block base 1 can also be connected to the cutter disc structure by other fixing methods such as bolt connection. A removable anti-retreat pressure block 2 is provided on the pressure block base 1, and the anti-retreat pressure block 2 is clamped on the cutter disc fixing seat 4 to effectively play an anti-retreat role. When changing the tool, the anti-retreat pressure block 2 can be removed from the pressure block base 1 without affecting the normal tool change.

[0026] Embodiment 2, as Figure 2 As shown, an anti-retraction device for a normal pressure tool changing device is further optimized on the basis of Example 1. The anti-retraction pressure block 2 is an L-shaped block. When installed, the L-shaped block is inverted so that the vertical beam portion of the L-shaped block is detachably connected to the pressure block base 1, and the cross beam portion of the L-shaped block is clamped and matched with the cutter disc fixing seat 4. The cross beam portion of the L-shaped block is located at the rear of the cutter disc fixing seat 4 to play an anti-retraction role.

[0027] As a preferred solution, the crossbeam end of the L-shaped block is tightly matched with the cutter disc fixing seat 4, that is, the crossbeam direction of the L-shaped block is perpendicular to the plane direction of the cutter disc fixing seat 4. At this time, the crossbeam end of the L-shaped block is tightly pressed on the plane of the cutter disc fixing seat 4, which serves the purpose of contact-type tightening and stopping retreat. In addition, as a preferred solution, a flange 11 is fixedly provided at the end of the vertical beam of the L-shaped block, and the connecting surface between the pressure block base 1 and the L-shaped block is an inclined surface to ensure the stability of the connection between the pressure block base 1 and the L-shaped block. An inclined threaded hole 12 is provided on the inclined surface, and the flange 11 is connected to the pressure block base 1 by a first bolt 3a matched with the inclined threaded hole 12, so as to realize the detachable connection between the pressure block base 1 and the anti-retreat pressure block 2.

[0028] Embodiment 3, an anti-retraction device for a normal pressure tool changing device, this embodiment is different from embodiment 2 in that this embodiment is a preferred solution, such as Figure 3 , 4 As shown in Figures 5 and 5, during actual use, a certain gap is left between the crossbeam of the L-shaped block and the cutter disc fixing seat 4 so that leakage can be detected and repaired in time. The anti-retreat device can be disassembled, inspected and replaced at any time. The pressure block base 1 is a wedge-shaped block, and the bottom surface of the wedge-shaped block is a horizontal plane 1-1. A avoidance surface 1-2 is provided on the side of the wedge-shaped block close to the cutter disc fixing seat 4, and the horizontal plane 1-1 is vertically arranged with the avoidance surface 1-2. The structural design of the pressure block base can not only achieve stable contact and connection with the cutter disc structure through the bottom horizontal plane, but also fit the cutter barrel structure as closely as possible through the avoidance surface, thereby reducing the space occupied by tool change.

[0029] This embodiment is a preferred solution. The bottom of the anti-retraction pressure block 2 is provided with an assembly groove, and the upper part of the pressure block base 1 is plugged into the assembly groove to achieve rapid assembly of the anti-retraction pressure block 2 and the pressure block base 1.

[0030] As a preferred mode in this embodiment, the pressure block base 1 and the anti-backward pressure block 2 are both provided with a transverse pin hole 7, and are connected by a pin shaft 3 matched with the transverse pin hole 7. Under normal anti-backward action, the pressure block base 1 and the anti-backward pressure block 2 are inserted into the corresponding transverse pin hole 7 through the pin shaft 3 to achieve a quick connection, adjust the gap between the anti-backward pressure block 2 and the fixed seat, and weld the whole to the cutter head structure. When the cutter needs to be changed, remove the pin shaft 3 and take off the anti-backward pressure block 2; installation and disassembly are reverse processes.

[0031] Embodiment 4, an anti-retraction device for a normal pressure tool changing device, the difference between this embodiment and embodiment 2 is that a stud is provided at the bottom of the anti-retraction pressure block 2, and the stud cooperates with a threaded hole provided on the pressure block base 1. Through the cooperation of the stud and the threaded hole, the anti-retraction pressure block 2 is connected to the pressure block base 1, and the gap between the anti-retraction pressure block 2 and the cutter head fixing seat 4 can be adjusted.

[0032] Embodiment 5, an anti-retraction device for a normal pressure tool changing device, such as Figure 6 As shown, the difference between this embodiment and embodiment 2 is that: a vertical threaded hole 8 is provided on the pressure block base 1, a vertical through hole 9 is provided on the anti-backward pressure block 2, a fastening bolt 10 is passed through the vertical through hole 9, and the fastening bolt 10 is threadedly matched with the vertical threaded hole 8; in this embodiment, bolts are used to achieve the connection between the anti-backward pressure block 2 and the pressure block base 1 and the adjustment of the gap between the anti-backward pressure block 2 and the cutter disc fixing seat 4.

[0033] Embodiment 6, a knife disc, such as Figure 1 , 2 As shown, the anti-retraction device for the normal pressure tool changing device described in any one of Examples 1 to 4 is adopted. When in use, first assemble the pressure block base 1, the anti-retraction pressure block 2 and the pin shaft 3 together; then, adjust the gap between the anti-retraction pressure block and the fixing seat 4, and weld the pressure block base 1 to the cutter disc structure 5; when changing the tool, remove the pin shaft 3, remove the anti-retraction pressure block 2 to avoid interference with the oil cylinder 6, and install the anti-retraction pressure block 2 and the pin shaft 3 in sequence after the tool change is completed. The cutter disc adopts the above-mentioned anti-retraction device and tool changing method for the normal pressure tool changing device, which prevents the normal pressure tool changing device from falling off due to loose bolts. A gap is left between the anti-retraction pressure block and the normal pressure tool changing device, which acts as a buffer when it falls off. At the same time, the leakage of slurry is easy for maintenance personnel to find in time, further improving the excavation efficiency of the cutter disc.

[0034] 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. An anti-retraction device for a normal pressure tool changing device, characterized in that: It comprises a pressure block base (1) fixed on a cutter disc structure (5), the pressure block base (1) being provided with a detachable anti-retraction pressure block (2), the anti-retraction pressure block (2) being fixed on a cutter disc fixing seat (4).

2. The anti-retraction device for a normal pressure tool changing device according to claim 1, characterized in that: The anti-retraction pressure block (2) is an L-shaped block, the vertical beam portion of the L-shaped block is detachably connected to the pressure block base (1), and the horizontal beam portion of the L-shaped block is fixedly matched with the cutter disc fixing seat (4); the pressure block base (1) is welded to the cutter disc structure (5).

3. The anti-retraction device for a normal pressure tool changing device according to claim 2, characterized in that: A gap is left between the crossbeam portion of the L-shaped block and the cutter disc fixing seat (4).

4. The anti-retraction device for a normal pressure tool changing device according to claim 3, characterized in that: The pressure block base (1) and the anti-retraction pressure block (2) are both provided with a transverse pin hole (7), and are connected via a pin shaft (3) that matches the transverse pin hole (7).

5. The anti-retraction device for a normal pressure tool changing device according to claim 3 or 4, characterized in that: The pressing block base (1) is a wedge-shaped block, the bottom surface of the wedge-shaped block is a horizontal surface (1-1), a side of the wedge-shaped block close to the cutter disc fixing seat (4) is provided with an avoidance surface (1-2), and the horizontal surface (1-1) and the avoidance surface (1-2) are arranged vertically.

6. The anti-retraction device for a normal pressure tool changing device according to claim 5, characterized in that: The anti-retraction pressure block (2) has an assembly groove at the bottom, and the upper part of the pressure block base (1) is plugged into and matched with the assembly groove.

7. The anti-retraction device for a normal pressure tool changing device according to claim 2, characterized in that: The end of the crossbeam of the L-shaped block is tightly fitted with the cutter head fixing seat (4).

8. The anti-retraction device for a normal pressure tool changing device according to claim 7, characterized in that: A flange (11) is fixedly provided at the end of the vertical beam of the L-shaped block, the connection surface between the pressing block base (1) and the L-shaped block is an inclined surface, an inclined surface threaded hole (12) is provided on the inclined surface, and the flange (11) is connected to the pressing block base (1) via a first bolt (3a) that matches the inclined surface threaded hole (12).

9. The anti-retraction device for a normal pressure tool changing device according to claim 1, characterized in that: The pressure block base (1) is provided with a vertical threaded hole (8), the anti-retraction pressure block (2) is provided with a vertical through hole (9), a fastening bolt (10) is passed through the vertical through hole (9), and the fastening bolt (10) is threadably matched with the vertical threaded hole (8).

10. A cutter disc, characterized in that: It comprises the anti-retraction device for the normal pressure tool changing device as described in any one of claims 1 to 9.

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