TBM cutterhead anti-blocking water spraying device

Abstract

The application discloses a TBM cutter head anti-blocking water spraying device, which comprises a water spraying head, a water baffle and a connecting head. The water spraying head is hollow and hemispherical, and a sliding groove is formed in the inner wall of the water spraying head in the circumferential direction. A water spraying channel is formed in the middle of the sliding groove. The water baffle is arranged in the water spraying head, and a water guide pipe penetrating through the water baffle is arranged in the middle of the water baffle. An elastic expansion piece is arranged in the water guide pipe, and the top of the elastic expansion piece is connected to an impact plate. The upper left side of the impact plate is connected to a left blocking plate through a left connecting piece, and the lower end of the left blocking plate is connected to the left end of the sliding groove through a first spring. The upper right side of the impact plate is connected to a right blocking plate through a right connecting piece, and the lower end of the right blocking plate is connected to the right end of the sliding groove through a second spring. The left blocking plate and the right blocking plate are slidably sleeved in the sliding groove. The connecting head is connected to the bottom of the water spraying head and is used for mounting the water spraying head on a mounting position of a TBM cutter head. The blocking plate of the application can slide in the sliding groove, and the bristles on the blocking plate can be used for brushing and cleaning the water spraying channel, so that the problem of blocking of the water spraying channel can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tunneling, in particular to a TBM cutterhead anti-blocking water spraying device. BACKGROUND

[0002] TBM, Tunnel Boring Machine. In a broad sense, it is divided into open type tunnel boring machine and shield type tunnel boring machine. In a narrow sense, the boring device used in rock stratum is called TBM, and the boring device used in soft soil stratum is called shield machine. The TBM referred to in the present application mainly refers to the tunnel boring machine used in rock stratum in a narrow sense.

[0003] As the most critical factor affecting the construction efficiency of TBM, the design of the cutterhead affects the boring efficiency, cutterhead balance, tool service life, main bearing / gearbox maintenance, slag discharge effect, face cutter and edge cutter / slag discharge bucket wear. The TBM cutterhead is generally installed at the front end of the tunnel boring machine and is the installation carrier of the rock breaking disc cutter and the muck scraping bucket. Whether the tunnel boring machine can be successfully constructed depends on whether all parts of the TBM system can normally operate.

[0004] During the rotation of the cutterhead, the front water spraying port is in contact with the rock stratum slag and is easily blocked. After the water spraying port is blocked, the dust reduction effect is lost, and the roller cutter cannot be cooled and lubricated. Since the roller cutter will rub against the rock under the action of the propelling force during rotation, the higher the speed, the greater the heat value. Therefore, if there is no cutterhead water spraying or the cutterhead water spraying is reduced, the roller cutter will quickly heat up and accelerate the roller cutter blade. In addition, high temperature can also cause oil seal failure and oil leakage, and then damage the tapered roller bearing, causing the roller cutter to be unevenly worn, and even damage the cutter body, resulting in more serious damage to the outside roller cutter than the inside roller cutter. Therefore, it is necessary to ensure that the cutterhead water spraying port is unblocked, and the water spraying pressure and flow rate are designed to meet the requirements.

[0005] The existing TBM cutterhead water spraying device generally uses a direct spraying method. Once the front water spraying port is in contact with the rock stratum slag, it is easily blocked, and the machine needs to be stopped for disassembly and cleaning of the cutterhead water spraying device, resulting in delay of the construction period. SUMMARY

[0006] The purpose of the present application is to provide a TBM cutterhead anti-blocking water spraying device to solve the problem that the existing TBM cutterhead water spraying device uses a direct spraying method, which easily causes the water spraying port to be blocked due to contact with the rock stratum slag.

[0007] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0008] A TBM cutterhead anti-blocking water spraying device, comprising:

[0009] The water spraying head is hollow and semispherical, and the inner wall is provided with a sliding groove along the circumference of the water spraying head, and the middle part of the sliding groove is a water spraying channel;

[0010] The water baffle is arranged inside the water spraying head, and the middle part is provided with a water guide pipe penetrating through the water baffle, and the water guide pipe is provided with an elastic expansion piece, and the top of the elastic expansion piece is connected to the impact plate;

[0011] The upper left side of the impact plate is connected to the left blocking plate through a left connecting piece, and the lower end of the left blocking plate is connected to the left end of the sliding groove through a first spring;

[0012] The upper right side of the impact plate is connected to the right blocking plate through a right connecting piece, and the lower end of the right blocking plate is connected to the right end of the sliding groove through a second spring;

[0013] The left blocking plate and the right blocking plate are slidably sleeved in the sliding groove;

[0014] The connecting head is connected to the bottom of the water spraying head, and is used for mounting the water spraying head on the mounting position of the TBM cutterhead;

[0015] When the water flow enters the water spraying head through the water guide pipe and washes the impact plate, the impact plate moves up, the elastic expansion piece is elongated, and the left blocking plate and the right blocking plate slide to the two sides of the sliding groove under the pulling of the first spring and the second spring respectively, so that the water spraying channel is opened;

[0016] When the water flow stops, the impact plate moves down under the contraction of the elastic expansion piece, and the left blocking plate and the right blocking plate are driven by the left connecting piece and the right connecting piece to the middle part of the sliding groove, so that the water spraying channel is closed.

[0017] In particular, the elastic expansion piece includes a first mounting plate fixed in the water guide pipe, a telescopic rod provided on the first mounting plate, a third spring sleeved outside the telescopic rod and arranged at the bottom of the first mounting plate, the third spring and the telescopic rod being connected to a second mounting plate at the top, and the second mounting plate being connected to the impact plate through a connecting rod; and the elastic modulus of the third spring is greater than twice the elastic modulus of the first spring.

[0018] In particular, the elastic expansion piece includes a first mounting plate fixed in the water guide pipe and blocking the water guide pipe, a telescopic rod provided on the first mounting plate, a third spring sleeved outside the telescopic rod and arranged at the bottom of the first mounting plate, the third spring and the telescopic rod being connected to a second mounting plate at the top, and the second mounting plate being connected to the impact plate through a connecting rod; and the elastic modulus of the third spring is greater than twice the elastic modulus of the first spring.

[0019] Further comprising a branch pipe arranged outside the water guide pipe, the branch pipe being in communication with the water guide pipe and being provided with a flow hole at the top towards the outer side of the impact plate.

[0020] Particularly, the left connecting piece includes a first connecting rod, the two ends of the first connecting rod are respectively hinged to the left side of the upper part of the impact plate and the left blocking plate, a limiting rod is arranged above the side close to the impact plate and below the side away from the impact plate in the middle of the first connecting rod, and the limiting rod is connected to the inner wall of the water jet head.

[0021] The structure of the right connecting piece is symmetrical to the structure of the left connecting piece about the center line of the impact plate.

[0022] Particularly, the left connecting piece includes a first pull rope, one end of the first pull rope is connected to the left side of the upper part of the impact plate, and the other end of the first pull rope is connected to the blocking plate after passing around the guide column arranged on the inner wall of the upper part of the sliding groove.

[0023] The right connecting piece includes a second pull rope, one end of the second pull rope is connected to the right side of the upper part of the impact plate, and the other end of the second pull rope is also connected to the right blocking plate after passing around the guide column.

[0024] Particularly, the lower surface of the water baffle is in an inverted funnel shape.

[0025] Particularly, the impact plate is a downwardly curved arc-shaped plate.

[0026] Particularly, the connecting head is internally provided with a water filtering assembly, the water filtering assembly includes a columnar shell fixed to the inner wall of the connecting head, a plurality of water passing holes are formed in the side wall of the columnar shell, a mounting hole with an internal thread is formed in the top of the columnar shell, and a circular third mounting plate is screwed into the mounting hole; a through hole is formed in the middle of the third mounting plate, and a filter basket is fixed in the through hole.

[0027] Particularly, the installation cylinder is provided with a threaded segment for being connected to the connecting head in the mounting groove in the middle of the cylinder wall which is recessed inward in a stepped manner at one end of the installation cylinder, and the other end of the installation cylinder is provided with a threaded connection segment for mounting the connecting head to the mounting position on the TBM cutter head.

[0028] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0029] 1. The blocking plate and the impact plate are connected by the connecting piece, so that the impact plate moves upward under the action of water flow, and the blocking plate slides in the sliding groove, and the bristles on the blocking plate brush the water jet groove, thereby effectively avoiding the problem of blockage caused by the contact between the water jet opening and the rock debris.

[0030] 2. The present application changes the straight jet type water jet opening in the prior art into a long strip-shaped water jet groove, thereby increasing the water jet coverage area and improving the poor water outlet condition caused by blockage of the hole-shaped water outlet in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0032] Figure 2 A schematic view of a profile structure of the present application.

[0033] Figure 3 A schematic view of a structure of an embodiment of the elastic extension piece.

[0034] Figure 4 A schematic view of a structure of another embodiment of the elastic extension piece.

[0035] Figure 5 A schematic view of a structure of an embodiment of the left connecting piece at A in the present application. Figure 2 A schematic view of a structure of another embodiment of the left connecting piece at A in the present application.

[0036] Figure 6 A schematic view of a structure of an embodiment of the right connecting piece at B in the present application. Figure 2 A schematic view of a structure of another embodiment of the right connecting piece at B in the present application.

[0037] Figure 7 A schematic view of a structure of the water filtering assembly.

[0038] Figure 8 A schematic view of a structure of the mounting cylinder.

[0039] The explanation of the numbers in the figure is as follows: water spraying head 1, water spraying channel 2, sliding channel 3, water isolation plate 4, water guide pipe 5, first mounting plate 501, extension rod 502, third spring 503, second mounting plate 504, branch pipe 505, impact plate 6, first connecting rod 601, limiting rod 602, first pull rope 603, guide column 604, left sealing plate 7, first spring 8, connecting head 9, columnar shell 901, water passing hole 902, mounting hole 903, third mounting plate 904, filtering basket 905, mounting cylinder 906, mounting channel 907, threaded connecting cylinder 908. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application, so as to have further understanding of the concept of the present application, the solved technical problems, the technical features of the technical solutions and the brought technical effects.

[0041] As shown in Figure 1 and Figure 2 A TBM cutterhead anti-blocking water spraying device, comprising:

[0042] The water spraying head 1 is a hollow hemispherical structure, and the inner wall of the water spraying head 1 is provided with a sliding channel 3 in the circumferential direction, and the middle part of the sliding channel 3 is a water spraying channel 2;

[0043] The water baffle 4 is arranged in the water spraying head 1, and the middle part is provided with the water guide pipe 5 penetrating the water baffle 4, and the water guide pipe 5 is provided with the elastic expansion piece, and the top of the elastic expansion piece is connected to the impact plate 6;

[0044] The upper left side of the impact plate 6 is connected to the left blocking plate 7 through the left connecting piece, and the lower end of the left blocking plate 7 is connected to the left end of the sliding groove 3 through the first spring 8;

[0045] The upper right side of the impact plate 6 is connected to the right blocking plate through the right connecting piece, and the lower end of the right blocking plate is connected to the right end of the sliding groove 3 through the second spring;

[0046] The left blocking plate 7 and the right blocking plate are slidably sleeved in the sliding groove 3;

[0047] The connecting head 9 is connected to the bottom of the water spraying head 1, and is used for mounting the water spraying head 1 on the mounting position of the TBM cutterhead;

[0048] When the water flow enters the water spraying head 1 through the water guide pipe 5 and washes the impact plate 6, the impact plate 6 moves upwards, the elastic expansion piece is elongated, and the left blocking plate 7 and the right blocking plate slide to the two sides of the sliding groove 3 under the pulling of the first spring 8 and the second spring respectively, so that the water spraying channel 2 is opened;

[0049] When the water flow stops, the impact plate 6 moves downwards under the contraction of the elastic expansion piece, and the left blocking plate 7 and the right blocking plate are driven by the left connecting piece and the right connecting piece respectively to converge to the middle part of the sliding groove 3, so that the water spraying channel 2 is closed.

[0050] The anti-blocking water spraying device mainly comprises two parts of the connecting head 9 and the water spraying head 1, and the two parts are connected to each other and connected to the external structure through the connecting head 9. The water baffle 4 is arranged in the water spraying head 1, and is used for blocking the water flow entering the water spraying head 1, so that the water flow can only enter above the water baffle 4 along the water guide pipe 5 and wash the impact plate 6 along the water guide pipe 5 to push the impact plate 6 to move upwards. In the initial state, the impact plate 6 is pulled downwards under the action of the elastic expansion piece, so that the left blocking plate 7 and the right blocking plate on the two sides are located in the upper half of the sliding groove 3, and the water spraying channel 2 is blocked to prevent the external water spraying port from contacting the rock stratum debris to cause the debris to enter the semispherical space inside the water spraying head 1 to cause blockage. When the water flow enters from the end of the connecting head 9, the impact plate 6 above is impacted, the impact plate 6 moves upwards under the impact of the water flow, the elastic expansion piece is elongated, the left blocking plate 7 and the right blocking plate move downwards under the action of the first spring 8 at the lower end of the sliding groove 3, so as to move away from the state of blocking the water spraying channel 2, so as to facilitate the water flow to be sprayed from the water spraying channel 2, and in this process, the bristles on the outer wall of the left blocking plate 7 and the right blocking plate can also clean and brush the water spraying channel 2, so as to reduce the blockage of the water spraying channel 2 caused by the accumulation of the rock stratum debris in the water spraying channel 2.

[0051] As a preferred embodiment, the elastic telescopic member comprises a first mounting plate 501 fixed in the water guide pipe 5, a vertical telescopic rod 502 provided on the first mounting plate 501, a third spring 503 sleeved outside the telescopic rod 502, the bottom of the third spring 503 being provided on the first mounting plate 501, the top of the third spring 503 and the telescopic rod 502 being connected to a second mounting plate 504, the second mounting plate 504 being connected to the impact plate 6 through a vertical connecting rod; the elastic modulus of the third spring 503 is greater than twice the elastic modulus of the first spring 8.

[0052] The embodiment provides a specific structure of the elastic telescopic member, and specifically, as shown in Figure 3 The first mounting plate 501 is provided inside the water guide pipe 5, and the impact plate is connected to the first mounting plate 501 through the third spring 503 and the telescopic rod 502. Since the elastic modulus of the third spring 503 is greater than twice the elastic modulus of the first spring 8, the first spring 8 is in an elongated state in an initial state, and the impact plate 6 is pulled down under the pulling force of the third spring 503. When water flows through the first mounting plate 501 and impacts on the impact plate 6, the third spring 503 is elongated from the initial state, and the two first springs 8 are contracted, so as to pull the left sealing plate 7 and the right sealing plate to move towards the bottom end of the sliding groove 3, and the opening process of the water spraying through slot 2 is completed.

[0053] As a preferred embodiment, the elastic telescopic member comprises a first mounting plate 501 fixed in the water guide pipe 5 and sealing the water guide pipe 5, a vertical telescopic rod 502 provided on the first mounting plate 501, a third spring 503 sleeved outside the telescopic rod 502, the bottom of the third spring 503 being provided on the first mounting plate 501, the top of the third spring 503 and the telescopic rod 502 being connected to a second mounting plate 504, the second mounting plate 504 being connected to the impact plate 6 through a vertical connecting rod; the elastic modulus of the third spring 503 is greater than twice the elastic modulus of the first spring 8; further comprising a branch pipe 505 provided outside the water guide pipe 5, the branch pipe 505 being in communication with the water guide pipe 5 and being provided with a through flow hole at the top and facing the outer edge of the impact plate 6.

[0054] The embodiment provides another specific structure of the elastic telescopic member, and specifically, as shown in Figure 4As shown, the first mounting plate 501 blocks the water conduit 5, so the water flow will flow out of the water conduit 5 along the outer branch pipe 505, and hit the outer edge of the impact plate 6 along the branch pipe 505. When the impact plate 6 moves up to complete the opening process of the water flow channel 2, the impact plate 6 is out of the impact range of the branch pipe 505, at this time the impact plate 6 falls back under the action of the third spring 503, and falls into the impact range of the branch pipe 505 again, and the above process is repeated again, so that the left blocking plate 7 and the right blocking plate move back and forth in the sliding groove 3, thereby realizing the process of continuously brushing and cleaning the water flow channel 2 by the bristles, thereby further helping to dredge the blockage in the water flow channel 2 on the basis of achieving the function of opening the water flow channel 2.

[0055] As a preferred embodiment, the left connecting member includes a first connecting rod 601, both ends of the first connecting rod 601 are respectively hinged to the upper left side of the impact plate 6 and the left blocking plate 7, and a limiting rod 602 is arranged on the upper side of the impact plate 6 and the lower side away from the impact plate 6 respectively in the middle of the first connecting rod 601, and the limiting rod 602 is connected to the inner wall of the water head 1.

[0056] The right connecting member is symmetric to the left connecting member about the center line of the impact plate 6.

[0057] The embodiment provides a specific structure of the connecting member, specifically, Figure 5 When the impact plate 6 moves up under the impact of the water flow, the upper surface of the first connecting rod 601 collides with the limiting rod 602 on the upper side, at this time the end of the first connecting rod 601 hinged to the impact plate 6 moves up, the distance between the first connecting rod 601 and the limiting rod 602 shortens, the length of the other end of the first connecting rod 601 is elongated, and the limiting rod 602 on the upper side acts as a rotating fulcrum, so that the end of the first connecting rod 601 hinged to the left blocking plate 7 moves down under the thrust of the other end, and the opening process of the water flow channel 2 is completed. When the water flow stops impacting the impact plate 6, the impact plate 6 moves down, at this time the first connecting rod 601 is driven by the impact plate 6 to move down to touch the limiting rod 602, and rotates about the limiting rod 602 on the lower side away from the impact plate 6, at this time the left blocking plate 7 is pushed up under the action of the first spring 8, and cooperates with the downward movement of the impact plate 6 and the rotation of the limiting rod 602, to force the left blocking plate 7 to move up to block the water flow channel 2.

[0058] The right connecting member is reversed.

[0059] As a preferred embodiment, the left connecting member includes a first pulling rope 603, one end of the first pulling rope 603 is connected to the upper left side of the impact plate 6, and the other end is connected to the blocking plate 7 after passing around a guide column 604, and the guide column 604 is horizontally arranged on the inner wall of the upper part of the sliding groove 3.

[0060] The right connecting member comprises a second pull rope, one end of which is connected to the upper right side of the impact plate 6, and the other end is also connected to the right blocking plate after passing around the guide column 604.

[0061] This embodiment provides another specific structure of the connecting member. Specifically, as shown in Figure 6 The first pull rope 603, as the connecting part of the left blocking plate 7 and the impact plate 6, is guided by the guide column 604, so that the pulling force of the first pull rope 603 acting on the left blocking plate 7 is along the running direction of the left blocking plate 7 and the right blocking plate, or the running direction of the sliding groove 3, ensuring smooth movement of the left blocking plate 7 and the right blocking plate during the lifting process.

[0062] The second pull rope is the same.

[0063] As a preferred embodiment, the lower surface of the bulkhead 4 is in the shape of an inverted funnel.

[0064] In this embodiment, by setting the lower surface of the bulkhead 4 in the shape of an inverted funnel, the fluid state of the water flow when it contacts the bulkhead 4 is improved, which helps to ensure the continuity and stability of the water flow when it impacts on the impact plate 6.

[0065] As a preferred embodiment, the impact plate 6 is a downwardly curved arc-shaped plate.

[0066] In this embodiment, by setting the impact plate 6 as a downwardly curved arc-shaped plate, the stress state of the impact plate 6 is improved when the water flow impacts on it, so that the flow rate of the water flow can be better converted into the movement of the impact plate 6.

[0067] As a preferred embodiment, the water filtering assembly comprises a cylindrical shell 901 fixed to the inner wall of the connecting head 9, the side wall of the cylindrical shell 901 is provided with a plurality of water holes 902, the top is provided with a mounting hole 903 with internal threads, and a circular third mounting plate 904 is screwed into the mounting hole 903; the third mounting plate 904 is provided with a through hole in the middle, and a filter basket 905 is fixed in the through hole.

[0068] This embodiment also provides a water filtering assembly, as shown in Figure 7As shown, the water entering the water jet head 1 is filtered in advance, wherein the filter basket 905 is located on the third mounting plate 904 and penetrates the through hole in the middle of the third mounting plate 904, the lower end surface is higher than the upper edge of the water through hole 902, and the cross section of the cylindrical shell 901 and the third mounting plate 604 and the filter basket 905 is in the shape of a Chinese character "j". When the filter basket 905 is completely blocked, water can be drained through the water through hole 902, that is, after the water flow enters the nozzle mounting cylinder connector 9, it enters the cylindrical shell 901 on the inner wall of the connector 9 along the water filtering assembly, and is filtered by the filter basket 905 first, so that the particles in the water flow are prevented from being stuck in the water jet through slot 2 and causing the water jet through slot 2 to be blocked. In order to prevent the water flow from being unable to pass normally due to the failure to clean the impurities in the filter basket 905 in time, the water can be drained through the water through hole 902.

[0069] As a preferred embodiment, the mounting cylinder 906 is further provided, the upper surface of the mounting cylinder 906 is recessed inward in a stepped manner, the middle part is provided with a mounting through slot 907 with an internal thread, and the connector 9 is screwed with the mounting through slot 907. The threaded connection cylinder 908 provided at the lower end of the mounting cylinder 906 is provided with an external thread and an internal thread.

[0070] In this embodiment, as shown in the figure, the mounting cylinder 906 is provided, and the mounting through slot 907 for mounting the device is arranged in the middle of the mounting cylinder 906, so that the device is further protected. Figure 8 The threaded connection cylinder 908 at the lower end of the mounting cylinder 906 is provided with an internal thread and an external thread, which can facilitate quick connection with the water conveying pipeline of the TBM, and can facilitate quick disassembly and replacement when the device is damaged.

[0071] In the description of the present application, "connection", "fixation", "welding" can be fixed connection, machining, welding, or mechanical connection, and the specific meaning of the above terms in the present application is understood.

[0072] In the description of the present application, the terms "center", "upper", "lower", "horizontal", "inner", "outer" and the like indicate the orientation or position relationship only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element must have a specific orientation, so it cannot be understood as a limitation on the present application.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions described in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A TBM cutterhead anti-clogging water spray device, characterized in that, include: The water nozzle (1) is a hollow hemispherical shape, and the inner wall has a sliding groove (3) along the circumference of the water nozzle (1). The middle part of the sliding groove (3) is the water spray channel (2). A water baffle (4) is installed inside the spray head (1), and a water guide pipe (5) is provided in the middle of the water baffle (4). An elastic telescopic component is provided inside the water guide pipe (5), and the top of the elastic telescopic component is connected to the impact plate (6). The upper left side of the impact plate (6) is connected to the left sealing plate (7) via a left connector, and the lower end of the left sealing plate (7) is connected to the left end of the sliding groove (3) via a first spring (8); The upper right side of the impact plate (6) is connected to the right sealing plate via the right connector, and the lower end of the right sealing plate is connected to the right end of the sliding groove (3) via the second spring; Both the left sealing plate (7) and the right sealing plate are slidably fitted into the sliding groove (3); Connector (9) is connected to the bottom of the spray head (1) for mounting the spray head (1) on the TBM cutter head; When the water flows through the water pipe (5) into the spray head (1) and washes the impact plate (6), the impact plate (6) moves upward, the elastic telescopic part is stretched, and the left sealing plate (7) and the right sealing plate slide to both sides of the sliding groove (3) under the pull of the first spring (8) and the second spring, so that the spray channel (2) is opened. When the water flow stops, the impact plate (6) moves down under the contraction of the elastic telescopic component, and the left sealing plate (7) and the right sealing plate are driven by the left connector and the right connector respectively to retract towards the middle of the sliding groove (3), so that the water spray channel (2) is closed. The elastic telescopic component includes a first mounting plate (501) fixed inside the water guide pipe (5), a telescopic rod (502) is provided on the first mounting plate (501), a third spring (503) is sleeved on the outside of the telescopic rod (502), the bottom of the third spring (503) is set on the first mounting plate (501), and the top of the third spring (503) and the telescopic rod (502) are connected to a second mounting plate (504). The second mounting plate (504) is connected to the impact plate (6) through a connecting rod; the elastic modulus of the third spring (503) is more than twice the elastic modulus of the first spring (8).

2. The TBM cutterhead anti-clogging water spray device as described in claim 1, characterized in that, The first mounting plate (501) blocks the water pipe (5); The elastic telescopic component also includes a branch pipe (505) disposed outside the water guide pipe (5), the branch pipe (505) being connected to the water guide pipe (5), and the top of the branch pipe (505) having a flow hole facing the outer edge of the impact plate (6).

3. The TBM cutterhead anti-clogging water spray device as described in claim 1, characterized in that, The left connecting member includes a first connecting rod (601), the two ends of which are hinged to the upper left side of the impact plate (6) and the left sealing plate (7) respectively. A limiting rod (602) is provided on the upper side of the first connecting rod (6) near the impact plate (6) and the lower side of the first connecting rod (601) away from the impact plate (6). The limiting rod (602) is connected to the inner wall of the spray head (1). The structures of the right connector and the left connector are symmetrical about the center line of the impact plate (6).

4. The TBM cutterhead anti-clogging water spray device as described in claim 1, characterized in that, The left connector includes a first pull rope (603), one end of which is connected to the upper left side of the impact plate (6), and the other end is connected to the sealing plate (7) after passing around the guide post (604). The guide post (604) is horizontally set on the upper inner wall of the sliding groove (3). The right connector includes a second pull rope, one end of which is connected to the upper right side of the impact plate (6), and the other end is also connected to the right sealing plate after passing around the guide post (604).

5. The TBM cutterhead anti-clogging water spray device as described in claim 1, characterized in that, The lower surface of the water-blocking plate (4) is an inverted funnel shape.

6. The TBM cutterhead anti-clogging water spray device as described in claim 1, characterized in that, The impact plate (6) is a downward-curved arc plate.

7. The TBM cutterhead anti-clogging water spray device as described in claim 1, characterized in that, The connector (9) is equipped with a water filter assembly inside. The water filter assembly includes a columnar shell (901) fixed to the inner wall of the connector (9). The side wall of the columnar shell (901) has several water passage holes (902). The top of the columnar shell (901) has an installation hole (903) with internal threads. A circular third mounting plate (904) is screwed into the mounting hole (903). The third mounting plate (904) has a through hole in the middle, and a filter basket (905) is fixed in the through hole.

8. The TBM cutterhead anti-clogging water spray device as described in claim 1, characterized in that, It also includes a mounting cylinder (906) with openings at both ends. One end of the mounting cylinder (906) has a stepped inward wall and a threaded section for connecting to the connector (9) is provided in the mounting through groove (907) in the middle of the mounting cylinder (906). The other end of the mounting cylinder (906) has a threaded connection section (908) that installs the connector (9) to the mounting position on the TBM cutter head.

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