Device capable of replacing cutter fixing seat at normal pressure and normal-pressure cutter head thereof

Abstract

The utility model discloses a device capable of replacing a cutter fixing seat at normal pressure and a normal-pressure cutterhead of the device, and solves the problems of difficulty in replacing the cutter fixing seat, long time consumption and high cost in the prior art. The device capable of replacing the cutter fixing seat at the normal pressure comprises a welding seat, a sealing seat and the cutter fixing seat, when the cutter fixing seat is replaced, the sealing seat is fixedly connected with the welding seat, and in the normal working state, the cutter fixing seat is detachably connected with the sealing seat and the welding seat. According to the structural design, rapid switching of the cutter fixing base can be achieved. By means of the sleeve and the corresponding bolt piece, the sealing seat and the welding seat are fixedly connected when the cutter fixing seat is replaced, meanwhile, the cutter fixing seat can be rapidly detached and replaced, and the replacement efficiency and the safety coefficient of replacing the cutter fixing seat are improved. According to the utility model, the time for replacing the cutter fixing seat is greatly shortened, the efficient replacement of the fixing seat in a normal-pressure environment can be completed without additionally using other devices, and the problems of difficulty in replacing the cutter fixing seat, long time consumption and high cost in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machines, in particular to a device capable of replacing a cutter fixing seat under normal pressure and a normal pressure cutter disc thereof. Background Art

[0002] Normal pressure cutterheads are increasingly used in tunnel construction due to their safety. Normal pressure cutters are arranged on both sides of the main beam of the normal pressure cutterhead, which are indispensable tools for auxiliary excavation. Normal pressure cutters are composed of cutter welding seats, cutter gates, cutter fixing seats, cutter barrels, cutter tools, etc. The force on the cutter head ultimately acts on the fixing seat. During long-term impact and vibration, the cutter fixing seat will have risks such as thread stripping and flange cracking.

[0003] In the existing knife assembly method, such as a normal pressure replaceable scraper device with publication number CN 207761654 U, the cutter fixing seat is installed on the welding seat together with the cutter gate. Therefore, if you want to replace the fixing seat, you must replace the gate together. At this time, it can only be achieved by replacing the sealing seat at normal pressure. However, this method requires the design and manufacture of multiple tooling, and the operation process is cumbersome, time-consuming, costly, and has high requirements on operators. Utility Model Content

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a device capable of replacing a cutter fixing seat under normal pressure and a normal pressure cutter disc thereof, which solves the problems in the prior art that the cutter fixing seat is difficult to replace, time-consuming and costly.

[0005] The technical solution of the utility model is implemented as follows: a device capable of replacing a cutter fixing seat at normal pressure comprises a welding seat, a sealing seat and a cutter fixing seat. When replacing the cutter fixing seat, the sealing seat is fixedly connected to the welding seat. Under normal working conditions, the cutter fixing seat is detachably connected to the sealing seat and the welding seat. The above structural design can meet the needs of rapid switching of the cutter fixing seat.

[0006] As a preferred solution, the welding seat is provided with a plurality of threaded holes arranged in a row. As a preferred solution, the threaded holes are arranged in two rows, one above the other, on the welding seat to ensure the stability of the connection.

[0007] As a preferred solution, at least two disassembly holes and a plurality of first light holes are provided on the first flange of the sealing seat, and the disassembly holes, the first light holes and the threaded holes correspond one to one.

[0008] As a preferred solution, at least two countersunk holes and a plurality of second light holes are provided on the second flange of the cutter fixing seat, the countersunk holes correspond one-to-one with the disassembly holes, and the second light holes correspond one-to-one with the first light holes.

[0009] As a preferred solution, under normal working conditions, a sleeve is provided in the countersunk hole and the corresponding disassembly hole, a fixing bolt is provided in the sleeve and in the second light hole and the corresponding first light hole, and the cutter fixing seat and the sealing seat are connected to the welding seat through the fixing bolt. As a preferred solution, when replacing the cutter fixing seat, a disassembly bolt is provided in the disassembly hole, and the sealing seat is fixedly connected to the welding seat through the disassembly bolt.

[0010] As a preferred solution, a cutter channel is provided on the welding seat, and a gate for opening and closing the cutter channel is provided on the sealing seat. The central axis of the knife barrel of the cutter fixing seat coincides with the central axis of the cutter channel, ensuring the sealing of the gate and the stability of the cutter installation.

[0011] As a preferred solution, a cutter is arranged in the cutter fixing seat, and the cutter is fixed in the cutter fixing seat through a rear end cover; the rear end cover is detachably connected to the cutter fixing seat, so that the cutter can be quickly replaced.

[0012] A normal pressure cutter disc comprises the device capable of replacing a cutter fixing seat under normal pressure.

[0013] The beneficial effects of the utility model are as follows: the utility model realizes the fixed connection between the sealing seat and the welding seat when replacing the cutter fixing seat through the sleeve and the corresponding bolt parts, and at the same time satisfies the rapid disassembly and replacement of the cutter fixing seat, thereby improving the replacement efficiency and safety factor of the cutter fixing seat. The utility model greatly shortens the time of replacing the cutter fixing seat and can complete the efficient replacement of the fixing seat under normal pressure without the need for additional use of other devices, thus solving the problems of the cutter fixing seat being difficult, time-consuming and costly to replace in the prior art; it has obvious practicality in terms of tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the normal working state of the utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the welding seat of the utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the cutter fixing seat of the utility model.

[0018] Figure 4 Schematic diagram of the process of replacing the cutter fixing seat.

[0019] Figure 5This is a schematic diagram of the installation and disassembly bolts during the replacement of the cutter fixing seat.

[0020] Figure 6 This is a schematic diagram of the state after the cutter fixing seat is removed.

[0021] In the figure: welding seat 1, threaded hole 101, cutter channel 102, sealing seat 2, first flange 201, disassembly hole 202, first light hole 203, cutter fixing seat 3, second flange 301, countersunk hole 302, second light hole 303, sleeve 4, fixing bolt 5, disassembly bolt 6, gate 7, cutter 8, rear end cover 9. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figure 1 , 5 As shown, in Example 1, a device capable of replacing a cutter fixing seat at normal pressure comprises a welding seat 1, a sealing seat 2 and a cutter fixing seat 3. When replacing the cutter fixing seat, the sealing seat 2 is fixedly connected to the welding seat 1. Under normal working conditions, the cutter fixing seat 3 is detachably connected to the sealing seat 2 and the welding seat 1. Specifically, under normal working conditions, the welding seat 1, the sealing seat 2 and the cutter fixing seat 3 are fixed as a whole, and the cutter fixing seat 3 is detachably connected to the sealing seat 2. When the cutter fixing seat needs to be replaced, the sealing seat 2 is first fixed to the welding seat 1, and then the cutter fixing seat 3 on the sealing seat 2 is replaced.

[0024] As an embodiment, the welding seat 1 is provided with a plurality of threaded holes 101 arranged in a row; the figure shows that each row contains 7 threaded holes, but in actual construction, the number of threaded holes can be increased or decreased as needed. The threaded holes 101 are arranged in two rows, upper and lower, on the welding seat 1 to ensure a stable connection between the cutter fixing seat 3, the sealing seat 2 and the welding seat 1 under normal working conditions.

[0025] like Figure 2 , 3As shown, in Example 2, a device capable of replacing a cutter fixing seat at normal pressure comprises a welding seat 1, a sealing seat 2 and a cutter fixing seat 3. When replacing the cutter fixing seat, the sealing seat 2 is fixedly connected to the welding seat 1. Under normal working conditions, the cutter fixing seat 3 is detachably connected to the sealing seat 2 and the welding seat 1. Specifically, under normal working conditions, the welding seat 1, the sealing seat 2 and the cutter fixing seat 3 are fixed as a whole, and the cutter fixing seat 3 is detachably connected to the sealing seat 2. When the cutter fixing seat needs to be replaced, the sealing seat 2 is first fixed to the welding seat 1, and then the cutter fixing seat 3 on the sealing seat 2 is replaced.

[0026] As an implementation mode, in this embodiment, the welding seat 1 is provided with a plurality of threaded holes 101 arranged in a row, and the first flange 201 of the sealing seat 2 is provided with at least two disassembly holes 202 and a plurality of first light holes 203, and the disassembly holes 202 and the first light holes 203 correspond to the threaded holes 101 one by one. The figure of this embodiment shows that there are four disassembly holes, that is, 4 are symmetrically provided up and down. The second flange 301 of the cutter fixing seat 3 is provided with at least two countersunk holes 302 and a plurality of second light holes 303, and the figure of this embodiment shows 4 countersunk holes, and the countersunk holes 302 correspond to the disassembly holes 202 one by one, and the second light holes 303 correspond to the first light holes 203 one by one.

[0027] like Figure 4 , 5 As shown, under normal working conditions, a sleeve 4 is provided in the counterbore 302 and the corresponding disassembly hole 202, a fixing bolt 5 is provided in the sleeve 4 and in the second light hole 303 and the corresponding first light hole 203, and the cutter fixing seat 3 and the sealing seat 2 are connected to the welding seat 1 through the fixing bolt 5. When replacing the cutter fixing seat, the fixing bolt 5 in the sleeve 4 is removed, and then a disassembly bolt 6 is set in the disassembly hole 202, and the sealing seat 2 is fixedly connected to the welding seat 1 through the disassembly bolt 6, and then other fixing bolts 5 are removed, and finally the cutter fixing seat 3 is replaced. In this embodiment, the fixing bolt 5 is a long bolt to ensure that it can pass through the second and first light holes at the same time and be threadedly connected with the threaded hole.

[0028] In this embodiment, the welding seat 1 is provided with a cutter channel 102, and the sealing seat 2 is provided with a gate 7 for opening and closing the cutter channel 102. When the cutter is pulled out to the cutter fixing seat 3, the gate is closed to prevent slag liquid and the like at the face from entering the cutter fixing seat 3. The central axis of the knife barrel of the cutter fixing seat 3 coincides with the central axis of the cutter channel 102, ensuring the sealing of the gate while facilitating the rapid disassembly and assembly of the cutter fixing seat 3. The cutter fixing seat 3 is provided with a cutter 8, which is fixed in the cutter fixing seat 3 by a rear end cover 9. The rear end cover is detachably connected to the cutter fixing seat to achieve rapid replacement of the cutter.

[0029] Embodiment 3, a normal pressure cutter disc, includes the device for replacing the cutter fixing seat at normal pressure as described in Embodiment 2. During normal excavation, four disassembly sleeves and long bolts are installed, and at this time, they are subjected to force together with other fixing bolts; when the fixing seat needs to be disassembled, the disassembly sleeves and long bolts are removed, and short bolts are installed, and other fixing bolts and fixing seats can be removed. The core concept of this design is that it is necessary to block the mud and water pressure at the face and replace the fixing seat. The sealing seat is a necessary device for blocking the mud and water pressure, and the fixing seat and the sealing seat are connected to the welding seat together. Therefore, it is necessary to try to separate the fixing seat from the sealing seat in a certain state, so as to realize a design that can block the mud and water pressure and replace the fixing seat at normal pressure.

[0030] The specific process of replacing the cutter fixing seat is as follows: During normal excavation, the welding seat 1 is welded to the cutter disc, and the sealing seat 2 and the fixing seat 3 are fixed to the welding seat 1 through fixing bolts and the sleeve 4 through fixing bolts. When the fixing seat is damaged and needs to be replaced, the sleeve 4 and the fixing bolts 5 at the location are removed, and the disassembly bolts 6 are installed at the location. Figure 5 As shown, then remove the remaining fixing bolts 5 and the cutter fixing seat 3; Figure 6 As shown, at this time, the disassembly bolts only connect the sealing seat and the welding seat, and are no longer connected to the fixing seat, so the fixing seat can be removed. The above structural design shortens the time for replacing the cutter fixing seat, and can complete the replacement of the fixing seat under normal pressure without using other additional devices, solving the problems of the cutter fixing seat being difficult, time-consuming and costly to replace in the prior art.

[0031] 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. A device capable of replacing a cutter fixing seat at normal pressure, comprising a welding seat (1), a sealing seat (2) and a cutter fixing seat (3), characterized in that: When the cutter fixing seat is replaced, the sealing seat (2) is fixedly connected to the welding seat (1); in a normal working state, the cutter fixing seat (3) is detachably connected to the sealing seat (2) and the welding seat (1); The welding seat (1) is provided with a plurality of threaded holes (101) arranged in a row; the first flange (201) of the sealing seat (2) is provided with at least two disassembly holes (202) and a plurality of first light holes (203), and the disassembly holes (202), the first light holes (203) and the threaded holes (101) correspond one to one; the second flange (301) of the cutter fixing seat (3) is provided with at least two countersunk holes (302) and a plurality of second light holes (303), and the countersunk holes (302) correspond one to one to the disassembly holes (202), and the second light holes (303) correspond one to one to the first light holes (203).

2. The device for replacing a cutter fixing seat under normal pressure according to claim 1, characterized in that: The threaded holes (101) are arranged in two upper and lower rows on the welding seat (1).

3. The device for replacing a cutter fixing seat under normal pressure according to claim 1, characterized in that: In a normal working state, a sleeve (4) is provided in the countersunk hole (302) and the corresponding disassembly hole (202), a fixing bolt (5) is provided in the sleeve (4) and in the second light hole (303) and the corresponding first light hole (203), and the cutter fixing seat (3) and the sealing seat (2) are connected to the welding seat (1) via the fixing bolt (5).

4. The device for replacing a cutter fixing seat under normal pressure according to claim 2 or 3, characterized in that: When the cutter fixing seat is replaced, a disassembly bolt (6) is provided in the disassembly hole (202), and the sealing seat (2) is fixedly connected to the welding seat (1) via the disassembly bolt (6).

5. The device for replacing a cutter fixing seat under normal pressure according to claim 1, characterized in that: The welding seat (1) is provided with a cutter channel (102), the sealing seat (2) is provided with a gate (7) for controlling the opening and closing of the cutter channel (102), and the central axis of the knife barrel portion of the cutter fixing seat (3) coincides with the central axis of the cutter channel (102).

6. The device for replacing a cutter fixing seat under normal pressure according to claim 1, characterized in that: A cutter (8) is arranged in the cutter fixing seat (3), and the cutter (8) is fixed in the cutter fixing seat (3) via a rear end cover (9).

7. A normal pressure cutter disc, characterized in that: A device comprising a cutter fixing seat capable of being replaced under normal pressure as described in any one of claims 1 to 6.

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