Plug-in type shield cutter with water spraying structure

Abstract

The utility model discloses a plug-in type shield cutter with a water spraying structure, which comprises a plug-in block and a hob body, a cutter shaft of the hob body is connected with the plug-in block, a cutter ring is mounted outside a rotating body of the hob body, a shield main body and an end cover are arranged outside the cutter ring, and an alloy block is arranged on the periphery of the shield main body in the circumferential direction. The end part of the outer side of the shield main body is an arc-shaped protruding part, and the alloy block is embedded into the arc-shaped protruding part; a wear-resistant welding layer is arranged on the outer side of the arc-shaped protruding part of the shield main body. The shield cutter ring with the alloy block is arranged, and the wear-resistant welding layer is arranged on the outer side of the shield cutter ring, so that the part actually making contact with hard rock is protected, the whole cutter has better wear resistance, and therefore the service life of the device is guaranteed. And by arranging the independent cooling structures, each plug-in type shield cutter with the water spraying structures can independently achieve cooling, water spraying cooling lubrication can be achieved without being connected with an external cooling spray head, and damage caused by temperature rising is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machinery, in particular to an insertable shield cutter with water spraying function. Background Art

[0002] For TBM hard rock tunneling and mining, the shield cutters used usually need to be installed on the main cutter in an inserted manner. However, the existing shield cutters generally have poor wear resistance and need to be replaced after being used for a period of time.

[0003] At the same time, the existing inserted shield cutters usually do not have an independent cooling structure and it is difficult to ensure a low temperature state after being used for a period of time, resulting in damage due to temperature rise. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an insertable shield cutter with a water spraying structure to solve the problem of rapid plugging and unplugging of shield equipment and achieve the effect of reasonable cooling.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an insertable shield cutter with a water spraying structure, including an insert block and a hob body. The cutter shaft of the hob body is connected to the insert block. A cutter ring is installed outside the rotating body of the hob body. A shield main body and an end cover are arranged outside the cutter ring. Alloy blocks are circumferentially arranged on the outer periphery of the shield main body. A water through hole is opened in the insert block and the cutter shaft of the hob body. A rotary joint is arranged at the end of the water through hole. The two sides of the rotary joint are respectively connected to the cutter shaft of the hob body and the end cover. An outlet channel is opened in the end cover, an annular gland and the cutter ring. The outlet channel, the rotary joint and the water through hole form a passage.

[0006] Preferably, a limit ring is arranged at one end of the cutter shaft of the hob body and is matched with the left end cover of the hob body. External threads are arranged at the other end of the cutter shaft of the hob body, and a locking nut is screwed on the external threads. The locking nut is matched with the right end cover of the hob body.

[0007] Preferably, the outer side end of the shield main body is an arc-shaped protrusion, and the alloy block is embedded in the arc-shaped protrusion. A wear-resistant welding layer is arranged outside the arc-shaped protrusion of the shield main body.

[0008] Preferably, the shield main body and the end cover are connected to the rotating body of the hob body through an annular gland.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0010] By setting a shield cutter ring with alloy blocks and arranging a wear-resistant welding layer outside it, the parts of the shield cutter actually in contact with hard rock are all protected, and the whole cutter is more wear-resistant, thus ensuring the service life of the device.

[0011] By setting up an independent cooling structure, each plug-in shield cutter with a water spraying structure can achieve self-cooling, and can realize water spraying for cooling and lubrication without connecting to an external cooling nozzle, thus avoiding damage caused by temperature rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of the present utility model.

[0013] Figure 2 It is a right view of the present utility model.

[0014] Figure 3 It is a cross-sectional view of another embodiment of the present utility model.

[0015] Figure 4 It is a left view of another embodiment of the present utility model.

[0016] 1. Insert block; 2. Hob body; 21. Limit ring; 22. Locking nut; 3. Cutter ring; 4. Shield main body; 5. Alloy block; 6. End cover; 7. Water through hole; 8. Rotary joint; 9. Annular gland; 10. Water outlet channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figure 1-2 , the present utility model provides a technical solution: a plug-in shield cutter with a water spraying structure, including an insert block 1 and a hob body 2. The hob body 2 is a prior art, including a cutter shaft, a left end cover, a left end face seal, a left bearing, a rotating body and a right bearing, which will not be elaborated here.

[0019] The cutter shaft of the hob body 2 is connected to the insert block 1. A cutter ring 3 is installed outside the rotating body of the hob body 2. A shield main body 4 and an end cover 6 are arranged outside the cutter ring 3. The shield main body 4 and the end cover 6 are connected to the rotating body of the hob body 2 through an annular gland 9. Specifically, threaded holes are circumferentially arranged outside both the cutter ring 3 and the annular gland 9. Only by connecting the cutter ring 3 and the annular gland 9 with screws can the shield main body 4 and the end cover 6 be pressed and fixed through the annular gland 9.

[0020] A limiting ring 21 is provided at one end of the cutter shaft of the hob body 2, and the limiting ring 21 cooperates with the left end cover of the hob body 2 to limit the maximum distance that the hob body 2 moves to the left. An external thread is provided at the other end of the cutter shaft of the hob body 2, and a locking nut 22 is screwed onto the external thread. The locking nut 22 cooperates with the right end cover of the hob body 2 to limit the maximum distance that the hob body 2 moves to the right.

[0021] The outer end of the shield main body 4 is an arc-shaped protrusion. Alloy blocks 5 are arranged circumferentially on the outer periphery of the shield main body 4, and the alloy blocks 5 are embedded and installed in the arc-shaped protrusion. The alloy blocks 5 protrude from the shield main body 4 as a whole and are the parts that first come into contact with hard rock. After installing the alloy blocks 5, the maximum diameter of this device is 12.5 inches. A wear-resistant welding layer is provided on the outer side of the arc-shaped protrusion of the shield main body 4 to ensure the wear resistance of the whole shield cutter.

[0022] Working principle: First, insert the insert block 1 into the rotatable shield main body. During the tunneling process, the shield main body is in a rotating state. The shield main body 4 is in a passive rotating state during the tunneling process, and the alloy blocks 5 constantly come into contact with the rock, thus completing mining.

[0023] Please refer to Figure 3-4 In addition, the present invention also provides another technical solution, which is different from the above technical solution: A water through hole 7 is provided in the cutter shaft of the insert block 1 and the hob body 2. A rotary joint 8 is provided at the end of the water through hole 7, and both sides of the rotary joint 8 are respectively connected to the cutter shaft and the end cover 6 of the hob body 2, so that water can be sprayed even when the end cover 6 is rotating. Water outlet channels 10 are provided in the end cover 6, the annular gland 9 and the cutter ring 3, and the water outlet channels 10, the rotary joint 8 and the water through hole 7 form a passage. After the water flow enters the rotary joint 8 from the water through hole 7, it will spray out along the water outlet channels 10. It is possible to achieve water spraying for cooling and lubrication without connecting an external cooling spray head, thus avoiding damage caused by temperature rise.

[0024] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0025] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A plug-in shield cutter with a water spray structure, characterized in that: It comprises an insert block (1) and a hob body (2), wherein the cutter shaft of the hob body (2) is connected to the insert block (1), a cutter ring (3) is installed outside the rotating body of the hob body (2), a shield body (4) and an end cover (6) are arranged outside the cutter ring (3), and an alloy block (5) is arranged on the outer circumference of the shield body (4); A water hole (7) is provided in the insert block (1) and the cutter shaft of the hob body (2); a rotary joint (8) is provided at the end of the water hole (7); and two sides of the rotary joint (8) are respectively connected to the cutter shaft of the hob body (2) and the end cover (6); A water outlet channel (10) is provided in the end cover (6), the annular pressure cover (9) and the knife ring (3), and the water outlet channel (10), the rotary joint (8) and the water through hole (7) form a passage.

2. The plug-in shield cutter with a water spray structure according to claim 1 is characterized in that: A limiting ring (21) is provided on one end of the cutter shaft of the hob body (2), and the limiting ring (21) cooperates with the left end cover of the hob body (2); The other end of the cutter shaft of the hob body (2) is provided with an external thread, and a locking nut (22) is screwed onto the external thread, and the locking nut (22) cooperates with the right end cover of the hob body (2).

3. The plug-in shield cutter with a water spray structure according to claim 1 is characterized in that: The outer end of the shield body (4) is an arc-shaped protrusion, and the alloy block (5) is embedded and installed in the arc-shaped protrusion; A wear-resistant welding layer is provided on the outer side of the arc-shaped protrusion of the shield body (4).

4. The plug-in shield cutter with a water spray structure according to claim 1 is characterized in that: The shield main body (4) and the end cover (6) are connected to the rotating body of the hob body (2) via an annular pressure cover (9).

Images