Anti-blocking water spraying device for TBM cutterhead

Abstract

The TBM cutterhead anti-blocking water spraying device comprises a water spraying head which is in a hollow hemisphere shape, a sliding groove is formed in the inner wall of the water spraying head in the circumferential direction of the water spraying head, and a water spraying through groove is formed in the middle of the sliding groove; a water guide pipe penetrating through the water stop plate is arranged in the middle of the water stop plate, an elastic telescopic part is arranged in the water guide pipe, and the top of the elastic telescopic part is connected to the impact plate; the lower end of the left blocking plate is connected to the left end of the sliding groove through a first spring; 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 both slidably sleeved with the sliding groove. The connector is connected to the bottom of the water spraying head and is used for mounting the water spraying head on a mounting position on a TBM cutter head; the blocking plate can slide in the sliding groove and is matched with the bristles on the blocking plate to brush the water spraying through groove, and therefore the problem that the water spraying through groove is blocked is effectively avoided.

Description

Technical Field

[0001] The invention relates to the field of tunnel excavation, and in particular to a TBM cutter head anti-blocking water spraying device. Background Art

[0002] TBM, Tunnel Boring Machine, is also known as Tunnel Boring Machine. In a broad sense, it is divided into open tunnel boring machines and shield tunnel boring machines. In a narrow sense, the excavation device used in rock formations is called TBM, and the excavation device used in soft soil formations is called shield machine. The TBM mentioned in this application mainly refers to the tunnel boring machine used in rock formations in a narrow sense.

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

[0004] During the rotary excavation of the cutterhead, the front water jet contacts with the rock slag and is easily blocked. When the water jet is blocked, it loses its dust reduction function and cannot cool or lubricate the roller cutter. As the roller cutter rubs against the rock under the action of the propulsion force during rotation, the higher the speed, the greater the calorific value. Therefore, if there is no water jet from the cutterhead or the water jet from the cutterhead is reduced, the roller cutter will heat up quickly and accelerate the rolling of the roller cutter. In addition, high temperature will also cause oil seal failure and oil leakage, and then the tapered roller bearing will be damaged, causing eccentric wear of the roller cutter and even damaging the cutter body, resulting in more serious damage to the outer roller cutter than the inner roller cutter. Therefore, it is necessary to ensure that the water jet from the cutterhead remains unobstructed and the flow design of the water jet press meets the requirements.

[0005] The existing TBM cutterhead water spraying device generally adopts a direct spraying method. Once the front water spraying port comes into contact with rock slag, it is easy to be blocked, and the cutterhead water spraying device needs to be stopped for disassembly and cleaning, resulting in delays in the construction period. Summary of the invention

[0006] The purpose of the present invention is to provide a TBM cutterhead anti-blocking water spraying device to solve the problem that the existing TBM cutterhead water spraying device adopts a direct spraying method, which is prone to blockage caused by contact between the water spraying port and rock slag.

[0007] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows: A TBM cutterhead anti-blocking water spraying device, comprising: The water spray head is a hollow hemispherical shape, and a sliding groove is opened on the inner wall along the circumference of the water spray head, and the middle part of the sliding groove is a water spray through groove; The water baffle is arranged inside the water sprinkler head, and a water guide pipe penetrating the water baffle is arranged in the middle, an elastic telescopic member is arranged inside the water guide pipe, and the top of the elastic telescopic member is connected to the impact plate; The left side of the upper part 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; The right side of the upper part 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; The left blocking plate and the right blocking plate are both slidably mounted in the sliding groove; A connector, connected to the bottom of the sprinkler head, used to install the sprinkler head at the mounting position on the TBM cutterhead; When water flows into the sprinkler head through the water guide pipe and flushes the impact plate, the impact plate moves up, the elastic telescopic member is stretched, and the left blocking plate and the right blocking plate slide to both sides of the sliding groove under the pull of the first spring and the second spring respectively, so that the sprinkler groove is opened; When the water flow stops, the impact plate moves downward under the contraction of the elastic telescopic member, and the left blocking plate and the right blocking plate are respectively driven by the left connecting member and the right connecting member to retract toward the middle of the sliding groove, so that the water spraying groove is closed.

[0008] In particular, the elastic telescopic member includes a first mounting plate fixed in the water pipe, a telescopic rod is provided on the first mounting plate, a third spring is sleeved on the outside of the telescopic rod, the bottom of the third spring is provided on the first mounting plate, the third spring and the top of the telescopic rod are connected to the second mounting plate, and the second mounting plate is connected to the impact plate through a connecting rod; the elastic modulus of the third spring is greater than twice the elastic modulus of the first spring.

[0009] In particular, the elastic telescopic member includes a first mounting plate fixed in the water conduit and blocking the water conduit, a telescopic rod is arranged on the first mounting plate, a third spring is sleeved on the outside of the telescopic rod, the third spring and the top of the telescopic rod are connected to the second mounting plate, and the second mounting plate is connected to the impact plate through a connecting rod; the elastic modulus of the third spring is greater than twice the elastic modulus of the first spring; It also includes a branch pipe arranged outside the water pipe, the branch pipe is connected with the water pipe, and a flow hole facing the outer edge of the impact plate is arranged on the top of the branch pipe.

[0010] In particular, the left connecting member includes a first connecting rod, the two ends of which are respectively hinged to the left side of the upper part of the impact plate and the left blocking plate, and a limiting rod is respectively provided at the upper part of the middle part of the first connecting rod close to the impact plate and the lower part of the side away from the impact plate, and the limiting rod is connected to the inner wall of the sprinkler head; The structures of the right connecting piece and the left connecting piece are symmetrical about the center line of the impact plate.

[0011] In particular, the left connecting member includes a first pull rope, one end of which is connected to the left side of the upper part of the impact plate, and the other end of which is connected to the blocking plate after passing through a guide column, and the guide column is horizontally arranged on the upper inner wall of the sliding groove; The right connecting member includes a second pull rope, one end of which is connected to the right side of the upper part of the impact plate, and the other end of which is also connected to the right blocking plate after passing around the guide column.

[0012] Particularly, the lower surface of the baffle is in the shape of an inverted funnel.

[0013] Particularly, the impact plate is an arc-shaped plate that bends downward.

[0014] In particular, a water filter assembly is provided inside the connector, and the water filter assembly includes a columnar shell fixed to the inner wall of the connector, a plurality of water holes are opened on the side wall of the columnar shell, and a mounting hole with an internal thread is opened on the top, and a circular third mounting plate is screwed into the mounting hole; a through hole is opened in the middle of the third mounting plate, and a filter basket is fixed in the through hole.

[0015] In particular, it also includes a mounting tube with openings at both ends, wherein the wall of one end of the mounting tube is recessed inward in a stepped manner, and a threaded section for connecting to a connecting head is provided in a mounting groove in the middle; a threaded connecting section protrudes from the other end of the mounting tube, and the threaded connecting section installs the connecting head to the mounting position on the TBM cutter head.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention connects the blocking plate and the impact plate through a connecting piece, so that the impact plate moves upward under the impact of water flow, thereby making the blocking plate slide in the sliding groove, and cooperates with the bristles on the blocking plate to brush the water spray groove, thereby effectively avoiding the problem of blockage caused by the contact between the water spray port and the rock slag.

[0017] 2. The present invention increases the water spray coverage area by changing the direct spray type water spray outlet in the prior art into a long strip-shaped water spray groove, thereby improving the problem of poor water flow caused by blockage of the hole-shaped water outlet in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0020] Figure 3 The figure is a schematic structural diagram of an embodiment of an elastic telescopic member.

[0021] Figure 4 It is a structural schematic diagram of another embodiment of the elastic telescopic member.

[0022] Figure 5 for Figure 2 A schematic structural diagram of an embodiment of the left connecting member at A.

[0023] Figure 6 for Figure 2 A schematic structural diagram of another embodiment of the left connecting member at A.

[0024] Figure 7 Schematic diagram of the water filtration component structure.

[0025] Figure 8 This is a schematic diagram of the installation tube structure.

[0026] The meanings of the numbers in the figure are as follows: water spray head-1; water spray groove-2; sliding groove-3; water baffle-4; water guide pipe-5; first mounting plate-501; telescopic 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 blocking plate-7; first spring-8; connector-9; columnar shell-901; water hole-902; mounting hole-903; third mounting plate-904; filter basket-905; mounting cylinder-906; mounting groove-907; threaded connecting cylinder-908. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention, so as to have a further understanding of the concept of the present invention, the technical problems solved, the technical features constituting the technical scheme and the technical effects brought about.

[0028] like Figure 1 and Figure 2 As shown, a TBM cutter head anti-blocking water spraying device comprises: The water spray head 1 is in a hollow hemispherical shape, and a sliding groove 3 is opened on the inner wall along the circumference of the water spray head 1, and the middle part of the sliding groove 3 is a water spray through groove 2; The water barrier 4 is arranged inside the water sprinkler 1, and a water pipe 5 penetrating the water barrier 4 is arranged in the middle, and an elastic telescopic member is arranged inside the water pipe 5, and the top of the elastic telescopic member is connected to the impact plate 6; The left side of the upper portion of the impact plate 6 is connected to the left blocking plate 7 through a 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 a first spring 8; The upper right side of the impact plate 6 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 3 through a second spring; The left blocking plate 7 and the right blocking plate are both slidably mounted in the sliding groove 3; A connector 9, connected to the bottom of the sprinkler head 1, for mounting the sprinkler head 1 at a mounting position on the TBM cutterhead; When water flows into the sprinkler head 1 through the water pipe 5 and flushes the impact plate 6, the impact plate 6 moves upward, the elastic telescopic member is stretched, and the left blocking plate 7 and the right blocking plate slide to both sides of the sliding groove 3 under the pull of the first spring 8 and the second spring, respectively, so that the water spraying groove 2 is opened; When the water flow stops, the impact plate 6 moves downward under the contraction of the elastic telescopic member, and the left blocking plate 7 and the right blocking plate are respectively driven by the left connecting member and the right connecting member to retract toward the middle of the sliding groove 3, so that the water spraying groove 2 is closed.

[0029] The anti-blocking water spraying device of the present invention is mainly composed of two parts, a connecting head 9 and a water spraying head 1, which are interconnected and connected to an external structure through the connecting head 9. A water baffle 4 is provided inside the water spraying head 1 to block the water flow entering the water spraying head 1, so that the water flow can only enter the top of the water baffle 4 along the water pipe 5, and flush the impact plate 6 along the water pipe 5, pushing the impact plate 6 to move upward. In the initial state, the impact plate 6 is pulled downward by the elastic telescopic part, so that the left blocking plate 7 and the right blocking plate on both sides are located in the upper half of the sliding groove 3 at this time, and the water spraying groove 2 is blocked to prevent the external water spraying port from contacting the rock slag and causing the slag to enter the hemispherical space of the water spraying head 1 and cause blockage. When water flows in from the end of the connector 9, it impacts the impact plate 6 above. The impact plate 6 moves upward under the impact of the water flow, and the elastic telescopic part stretches, so that the left sealing plate 7 and the right sealing plate move downward under the action of the first spring 8 at the lower end of the sliding groove 3, thereby removing the water from the blocked water spraying groove 2 to facilitate the water flow to spray out of the water spraying groove 2. In this process, the bristles on the outer walls of the left sealing plate 7 and the right sealing plate can also clean and scrub the water spraying groove 2, thereby reducing the blockage of the water spraying groove 2 caused by the accumulation of rock slag in the water spraying groove 2.

[0030] As a preferred embodiment, the elastic telescopic member includes a first mounting plate 501 fixed in the water pipe 5, a vertical 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 arranged on the first mounting plate 501, the third spring 503 and the top of the telescopic rod 502 are connected to the second mounting plate 504, and the second mounting plate 504 is 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.

[0031] This embodiment provides a specific structure of an elastic expansion member. Specifically, Figure 3As shown, the first mounting plate 501 is arranged inside the water 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 extended state in the initial state, and the impact plate 6 is pulled down under the pulling force of the third spring 503. When the water flow passes through the first mounting plate 501 and impacts the impact plate 6, the third spring 503 is extended from the initial state, and the two first springs 8 are contracted, thereby pulling the left blocking plate 7 and the right blocking plate to move toward the bottom end of the sliding groove 3, completing the opening process of the water spraying groove 2.

[0032] As a preferred embodiment, the elastic telescopic member includes a first mounting plate 501 fixed in the water pipe 5 and blocking the water pipe 5, a vertical telescopic rod 502 is provided on the first mounting plate 501, and a third spring 503 is provided on the outside of the telescopic rod 502, and the bottom is provided on the first mounting plate 501, and the third spring 503 and the top of the telescopic rod 502 are connected to the second mounting plate 504, and the second mounting plate 504 is 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; and it also includes a branch pipe 505 arranged on the outside of the water pipe 5, the branch pipe 505 is connected to the water pipe 5, and a flow hole facing the outer edge of the impact plate 6 is provided on the top.

[0033] This embodiment provides another specific elastic expansion member structure. Specifically, Figure 4 As shown, the first mounting plate 501 blocks the water pipe 5, so the water will flow out of the water pipe 5 along the outer branch pipe 505 and rush toward the outer edge of the impact plate 6 along the branch pipe 505. At this time, after the impact plate 6 moves upward to complete the opening process of the water spray slot 2, since the impact plate 6 is out of the impact range of the branch pipe 505, 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 reciprocate in the sliding groove 3, thereby realizing the process of continuously brushing and cleaning the water spray slot 2 with bristles, thereby further helping to clear the blockage in the water spray slot 2 on the basis of achieving the function of opening the water spray slot 2.

[0034] As a preferred embodiment, the left connecting member includes a first connecting rod 601, the two ends of which 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 respectively provided at the upper side of the middle part of the first connecting rod 601 close to the impact plate 6 and the lower side away from the impact plate 6, and the limiting rod 602 is connected to the inner wall of the sprinkler head 1; The structures of the right connecting piece and the left connecting piece are symmetrical about the center line of the impact plate 6 .

[0035] This embodiment provides a specific structure of a connecting piece. Specifically, Figure 5 The two ends of the first connecting rod 601 are respectively hinged to the upper part of the impact plate 6 and the end of the left blocking plate 7. When the impact plate 6 moves upward 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 upward, the distance between the first connecting rod 601 and the limiting rod 602 is shortened, and the length of the other end of the first connecting rod 601 is extended, 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 downward under the pushing action of the other end, completing the opening process of the water spray slot 2. When the water flow stops impacting the impact plate 6, the impact plate 6 moves downward, and the impact plate 6 drives the first connecting rod 601 to move downward until it touches the limit rod 602, and rotates with the limit rod 602 at the lower side away from the impact plate 6 as the axis of rotation. At this time, the left blocking plate 7 is pushed upward under the action of the first spring 8, and cooperates with the downward movement of the impact plate 6 and the turning of the limit rod 602 to achieve the purpose of forcing the left blocking plate 7 to move upward to the state of blocking the water spray groove 2.

[0036] The right connector is reversed in the same way.

[0037] As a preferred embodiment, the left connecting member 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 of which is connected to the blocking plate 7 after bypassing the guide column 604, and the guide column 604 is horizontally arranged on the upper inner wall of the sliding groove 3; The right connecting member 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 of which is also connected to the right blocking plate after passing around the guide column 604.

[0038] This embodiment provides another specific structure of the connecting member. Specifically, Figure 6 As shown, the first pull rope 603 serves as the connecting part between the left blocking plate 7 and the impact plate 6, and is guided by the guide column 604, so that the pulling force exerted by the first pull rope 603 on the left blocking plate 7 is along the moving direction of the left blocking plate 7 and the right blocking plate or the moving direction of the sliding groove 3, ensuring smooth movement of the left blocking plate 7 and the right blocking plate during the lifting and lowering process.

[0039] The same goes for the second pull rope.

[0040] As a preferred embodiment, the lower surface of the water-blocking plate 4 is in the shape of an inverted funnel.

[0041] In this embodiment, by setting the lower surface of the baffle plate 4 to an inverted funnel shape, the fluid state of the water flow when it contacts the baffle plate 4 is improved, which helps to ensure the continuity and stability of the water flow when it impacts the impact plate 6.

[0042] As a preferred embodiment, the impact plate 6 is a curved plate that bends downward.

[0043] In this embodiment, by setting the impact plate 6 as a downward curved plate, when the water flow impacts the impact plate 6, the stress state of the impact plate 6 is improved, so that the flow velocity of the water flow can be better converted into the movement of the impact plate 6.

[0044] As a preferred embodiment, the water filtration assembly includes a columnar shell 901 fixed to the inner wall of the connecting head 9, the side wall of the columnar shell 901 is provided with a plurality of water holes 902, and the top is provided with a mounting hole 903 with an internal thread, a circular third mounting plate 904 is screwed into the mounting hole 903; a through hole is provided in the middle of the third mounting plate 904, and a filter basket 905 is fixed in the through hole.

[0045] This embodiment also provides a water filter component, such as Figure 7 As shown, it is used to filter the water entering the water spray head 1 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, and its lower end surface is higher than the upper edge of the water hole 902. The cross-section of the columnar housing 901, the third mounting plate 604 and the filter basket 905 as a whole forms a "J"-shaped structure. When the filter basket 905 is completely blocked, it can be drained through the water hole 902, that is, after the water flow enters the nozzle mounting tube connector 9, it follows the water filter assembly into the columnar housing 901 located on the inner wall of the connector 9, and is first filtered by the filter basket 905 to prevent the granular impurities in the water flow from being stuck in the water spray groove 2 when passing through the water spray groove 2, causing the water spray groove 2 to be blocked. In order to avoid the impurities in the filter basket 905 not being cleaned in time, resulting in the inability of the water flow to pass normally, the water can be discharged through the water hole 902.

[0046] As a preferred embodiment, it also includes a mounting tube 906, the upper surface of which is stepped and recessed inward, and a mounting groove 907 with an internal thread is provided in the middle, and the connecting head 9 is threadedly matched with the mounting groove 907; it also includes a threaded connection tube 908 arranged at the lower end of the mounting tube 906, and the threaded connection tube 908 is provided with an external thread and an internal thread.

[0047] In this embodiment, if Figure 8 As shown, by providing a mounting tube 906 and providing a mounting groove 907 for installing the device of the present invention in the middle of the mounting tube 906, further protection of the device of the present invention is achieved. The threaded connection tube 908 at the lower end of the mounting tube 906 is provided with internal and external threads, which can facilitate quick connection with the water delivery pipeline of the TBM, and can also facilitate quick disassembly and replacement of the device of the present invention when it is damaged.

[0048] The terms “connection” and “fixation” mentioned in the description of the present invention may refer to fixed connection, processing and forming, welding or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0049] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inside", "outside", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying a specific orientation that the device or element referred to must have, and therefore cannot be understood as a limitation on the present invention.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A TBM cutterhead anti-blocking water spraying device, characterized in that: include: The water spray head (1) is in the shape of a hollow hemisphere, and a sliding groove (3) is formed on the inner wall along the circumference of the water spray head (1), and the middle of the sliding groove (3) is a water spray through groove (2); A water baffle (4) is arranged inside the water spray head (1), and a water guide pipe (5) is provided in the middle thereof and passes through the water baffle (4). An elastic telescopic member is provided in the water guide pipe (5), and the top of the elastic telescopic member is connected to the impact plate (6); The left upper portion of the impact plate (6) is connected to the left blocking plate (7) via a left connecting piece, and the lower end of the left blocking plate (7) is connected to the left end of the sliding groove (3) via a first spring (8); The right side of the upper portion of the impact plate (6) is connected to the right blocking plate via a right connecting piece, and the lower end of the right blocking plate is connected to the right end of the sliding groove (3) via a second spring; The left blocking plate (7) and the right blocking plate are both slidably mounted in the sliding groove (3); A connecting head (9) connected to the bottom of the sprinkler head (1) and used to install the sprinkler head (1) at a mounting position on the TBM cutterhead; When water flows through the water guide pipe (5) into the water spray head (1) and flushes the impact plate (6), the impact plate (6) moves upward, the elastic telescopic member is stretched, and the left blocking plate (7) and the right blocking plate slide toward both sides of the sliding groove (3) under the pull of the first spring (8) and the second spring, respectively, so that the water spray groove (2) is opened; When the water flow stops, the impact plate (6) moves downward under the contraction of the elastic telescopic member, and the left blocking plate (7) and the right blocking plate are respectively driven by the left connecting member and the right connecting member to retract toward the middle of the sliding groove (3), so that the water spraying groove (2) is closed.

2. A TBM cutter head anti-blocking water spraying device as claimed in claim 1, characterized in that: The elastic telescopic member comprises a first mounting plate (501) fixed in the water conduit (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 provided on the first mounting plate (501); 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 an impact plate (6) via a connecting rod; the elastic modulus of the third spring (503) is greater than twice the elastic modulus of the first spring (8).

3. A TBM cutter head anti-blocking water spraying device as claimed in claim 1, characterized in that: The elastic telescopic member comprises a first mounting plate (501) fixed in the water conduit (5) and blocking the water conduit (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) and the bottom of the third spring (503) is provided on the first mounting plate (501); the third spring (503) and the top of the telescopic rod (502) are connected to a second mounting plate (504); the second mounting plate (504) is connected to the impact plate (6) via a connecting rod; the elastic modulus of the third spring (503) is greater than twice the elastic modulus of the first spring (8); It also includes a branch pipe (505) arranged outside the water pipe (5), the branch pipe (505) being in communication with the water pipe (5) and having a flow hole at the top thereof facing the outer edge of the impact plate (6).

4. A TBM cutter head anti-blocking water spraying device as claimed in claim 1, characterized in that: The left connecting member comprises a first connecting rod (601), the two ends of the first connecting rod (601) being hinged to the upper left side of the impact plate (6) and the left blocking plate (7) respectively, and a limiting rod (602) is respectively provided at the upper side of the middle part of the first connecting rod (601) close to the impact plate (6) and the lower side away from the impact plate (6), and the limiting rod (602) is connected to the inner wall of the water spray head (1); The structures of the right connecting piece and the left connecting piece are symmetrical about the center line of the impact plate (6).

5. The TBM cutter head anti-blocking water spraying device according to claim 1, characterized in that: The left connecting member comprises a first pull rope (603), one end of the first pull rope (603) is connected to the upper left side of the impact plate (6), and the other end of the first pull rope (603) is connected to the blocking plate (7) after passing through a guide column (604), and the guide column (604) is horizontally arranged on the upper inner wall of the sliding groove (3); 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 of which is connected to the right blocking plate after passing around the guide column (604).

6. The TBM cutter head anti-blocking water spraying device according to claim 1, characterized in that: The lower surface of the water-blocking plate (4) is in the shape of an inverted funnel.

7. The TBM cutter head anti-blocking water spraying device according to claim 1, characterized in that: The impact plate (6) is an arc-shaped plate that bends downward.

8. The TBM cutterhead anti-blocking water spraying device according to claim 1, characterized in that: A water filter assembly is provided inside the connector (9), the water filter assembly comprising a columnar housing (901) fixed to the inner wall of the connector (9), a plurality of water holes (902) being provided on the side wall of the columnar housing (901), a mounting hole (903) with an internal thread being provided on the top, a circular third mounting plate (904) being screwed into the mounting hole (903); a through hole being provided in the middle of the third mounting plate (904), and a filter basket (905) being fixed in the through hole.

9. The TBM cutter head anti-blocking water spraying device according to claim 1, characterized in that: It also comprises a mounting tube (906) with openings at both ends, wherein the wall of one end of the mounting tube (906) is recessed inwardly in a stepped manner, and a threaded section for connecting to the connector (9) is provided in a mounting through groove (907) in the middle; a threaded connection section (908) protrudes from the other end of the mounting tube (906), and the threaded connection section (908) installs the connector (9) to the mounting position on the TBM cutterhead.

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