A cutter head rotary joint for a small-diameter slurry shield machine

Abstract

The present invention discloses a cutter head rotary joint for a small-diameter slurry shield machine, which comprises a flange long pipe fitting, a fixing member for installing an external pipeline, a connecting device, a front protection device arranged at the front end of the flange long pipe fitting and connected to the cutter head flange, and a driving device; a plugging mechanism is arranged in the front protection device; in the plugged state, the plugging mechanism plugs the channel for the working medium to flow into the front protection device, so as to prevent the working medium from flowing from the front protection device into the flange long pipe fitting. When a fault occurs and disassembly, repair or replacement of parts is required, the setting of the plugging mechanism can isolate the slurry chamber from the rear equipment, realizing the self-adaptive protection and isolation function of the rotary joint, making the operation process convenient and easy, and not occupying extra space, which is applicable to small-diameter slurry shield machines; in addition, it creates the required environment for troubleshooting the faults of structures such as the driving device, effectively preventing the leakage of the working medium and avoiding the occurrence of safety accidents.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel boring equipment, and more specifically, to a cutter head rotary joint for a small-diameter slurry shield machine. Background Art

[0002] In a conventional shield machine drive device, the space in the central area inside is relatively large, and there is enough space to place the central rotary joint as a separate component. Personnel can enter the inside for disassembly, assembly, etc. without restriction, and a control valve is provided at the connection between the back of the cutter head central partition and the rotary joint. When the rotary joint needs to be repaired, the staff can enter the back of the cutter head, close the control valve and then carry out the repair operation.

[0003] However, in recent years, shield construction has been widely used in the construction of municipal tunnel projects such as drainage, sewage disposal, and power cables at home and abroad. A significant feature of such projects is that the tunnel diameter is small. On the basis of meeting the original functions, the equipment construction is restricted by space, posing a more stringent test for the design of equipment components and the layout of components and parts.

[0004] In the prior art, a one-way transition plate is provided between the rotary joint and the cutter head, and a one-way valve is installed on the one-way transition plate. This setting method is applicable to the case where there is a large installation space, and it is limited in application for small-diameter shield machines or pipe jacking machines with small working spaces. In addition, there is also a solution in the prior art that uses a casing method to solve the technical problem that the rotary joint cannot be installed due to the small diameter of the cutter head of a small shield machine. In order to adapt to the small space, the rotary joint is installed on the drive device. If the drive device needs to perform operations such as troubleshooting and maintenance, the rotary joint needs to be disassembled first. If the connection end between the rotary joint and the slurry sump has no closed protection function, the relevant work will be blocked and the next step cannot be carried out; and the disassembly, assembly, and replacement are complex, and the maintenance difficulty is large.

[0005] In summary, how to provide a rotary joint suitable for a small-diameter shield machine and convenient for replacing and repairing vulnerable parts is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a cutter head rotary joint for a small-diameter slurry shield machine, which is provided with a pre-protection device. Under normal circumstances, the working medium can flow from the external pipeline through the flange long pipe fitting and the pre-protection device into the slurry sump. When the components of the rotary joint are damaged, the external pipeline connected to the rear of the rotary joint can be cut off. Under the action of pressure, the working medium is transported from the slurry sump from front to back, and the pre-protection device closes the channel to prevent the working medium from being transported backward, facilitating the troubleshooting and replacement of components such as the subsequent drive device and the rotary joint.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] A rotary joint for the cutter head of a small-diameter slurry shield tunneling machine, comprising a long flange pipe fitting, a fixing member arranged at the rear end of the long flange pipe fitting and used for installing external pipelines, a connecting device for connecting the fixing member and the long flange pipe fitting, a pre-protection device arranged at the front end of the long flange pipe fitting and connected to the cutter head flange, and a driving device for driving the rotation of the long flange pipe fitting;

[0009] A plugging mechanism is arranged in the pre-protection device;

[0010] In the non-plugged state, the working medium in the external pipeline can enter the slurry chamber through the fixing member, the connecting device, the long flange pipe fitting, and the pre-protection device;

[0011] In the plugged state, the plugging mechanism plugs the channel for the working medium to flow in the pre-protection device, preventing the working medium from flowing from the pre-protection device into the long flange pipe fitting.

[0012] Preferably, the pre-protection device includes a device main body provided with the channel, a jet block arranged at one end of the device main body facing the slurry chamber, and the plugging mechanism; the jet block is provided with jet holes for ejecting the working medium, and the jet holes are communicated with the channel;

[0013] The jet block is connected to the device main body.

[0014] Preferably, the plugging mechanism includes a plugging member arranged on the device main body and a cooperating member movably arranged in the channel of the device main body; the plugging member is provided with a plugging surface, and the cooperating member is provided with a cooperating surface that cooperates with the plugging surface to plug the channel;

[0015] And along the length direction of the channel, the cooperating member is arranged between the plugging member and the jet block.

[0016] Preferably, the plugging member is provided with a through hole communicated with the channel, and the outer peripheral part of the plugging member is hermetically connected to the channel, and the plugging surface is an arc surface facing the cooperating member;

[0017] The cooperating member is a spherical structure, and the size of the spherical structure cooperates with the arc surface.

[0018] Preferably, the cross-section of the channel is square.

[0019] Preferably, a boss is arranged on one side of the jet block facing the channel to prevent the cooperating member from plugging the jet holes.

[0020] Preferably, the connecting device includes a meshing flange meshed and drivingly connected to the rear end of the long flange pipe, and a rotating structure connected to the meshing flange, and the rotating structure is connected to the fixing member through a bearing.

[0021] Preferably, a plurality of protrusions are provided on the outer peripheral portion of the rear end of the long flange pipe, the meshing flange is provided with grooves cooperating with the protrusions, and the meshing flange is sleeved on the outer peripheral portion of the long flange pipe.

[0022] Preferably, the cross section of the protrusion is rectangular, and the number of the protrusions is multiple and evenly distributed along the circumferential direction of the long flange pipe.

[0023] Preferably, a first sealing assembly is provided between the cutter head flange and the front protection device, and a second sealing assembly is provided between the long flange pipe and the driving device.

[0024] During the process of using the cutter head rotary joint of the small-diameter slurry shield machine provided by the present invention, the driving device drives the long flange pipe to rotate. The front end of the long flange pipe is connected to the front protection device, and the front protection device is connected to the cutter head flange. And the rear end of the long flange pipe is connected to the fixing member through the connecting device. Therefore, the fixing member connected with the external pipeline is fixedly arranged. Under normal circumstances, the working medium enters from the external pipeline connected to the fixing member, passes through the fixing member, the connecting device, the long flange pipe, and the front protection device and enters the slurry chamber to wash the central area of the cutter head. When a failure occurs in the driving device or components such as seals in the rotary joint need to be disassembled, repaired or replaced, the working medium at the rear can be closed. Under the action of the working pressure in the slurry chamber, the blocking mechanism blocks the channel for the working medium to flow into the front protection device, avoiding the working medium from flowing out of the slurry chamber through the front protection device, and can prevent the working medium from flowing into the long flange pipe from front to back.

[0025] Compared with the prior art, when a failure occurs in the driving device or components such as seals in the rotary joint need to be disassembled, repaired or replaced, the setting of the blocking mechanism can isolate the slurry chamber from the rear equipment. At this time, the driving device can be repaired or the vulnerable parts of the rotary joint can be replaced, realizing the self-adaptive protection and isolation function of the rotary joint, making the operation process convenient and easy, and not occupying extra space, and can be applied to small-diameter slurry shield machines. In addition, the setting of the blocking mechanism in the front protection device creates the required environment for troubleshooting the driving device and other structures, effectively preventing the leakage of the working medium and avoiding the occurrence of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0027] Figure 1 It is a schematic cross-sectional view of a specific embodiment of the cutter head rotary joint of a small-diameter slurry shield machine provided by the present invention;

[0028] Figure 2 is Figure 1 an enlarged schematic view of the front protection device in

[0029] Figure 3 is Figure 1 a schematic cross-sectional view in the A-A direction in

[0030] Figure 4 is Figure 1 a schematic cross-sectional view in the B-B direction in

[0031] Figures 1-4 In

[0032] 1 is a flange long pipe fitting, 2 is a meshing flange, 3 is a rotating structure, 4 is a fixing part, 5 is a front protection device, 51 is a device main body, 52 is a plugging part, 53 is a jet block, 531 is a jet hole, 532 is a convex platform, 54 is a fitting part, 55 is a fourth bolt group, 61 is a first sealing assembly, 62 is a second sealing assembly, 7 is a first bolt group, 8 is a second bolt group, 9 is a third bolt group, 10 is a cutter head flange, and 11 is a driving device. Specific embodiments

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0034] The core of the present invention is to provide a cutter head rotary joint of a small-diameter slurry shield machine. When the driving device or other parts are damaged and need to be replaced, the channel in the front protection device can be blocked by the blocking mechanism to avoid the leakage of the working medium, which is convenient for the replacement and maintenance of vulnerable parts.

[0035] Please refer to Figures 1-4 , Figure 1Schematic cross-sectional view of a specific embodiment of the cutter head rotary joint of a small-diameter slurry shield tunneling machine provided by the present invention; Figure 2 is Figure 1 an enlarged schematic view of the front protection device in Figure 3 is Figure 1 a cross-sectional view in the A-A direction in Figure 4 is Figure 1 a cross-sectional view in the B-B direction in

[0036] The cutter head rotary joint of the small-diameter slurry shield tunneling machine provided by this specific embodiment includes a flange long pipe fitting 1, a fixing member 4 arranged at the rear end of the flange long pipe fitting 1 and used for installing external pipelines, a connecting device for connecting the fixing member 4 and the flange long pipe fitting 1, a front protection device 5 arranged at the front end of the flange long pipe fitting 1 and connected to the cutter head flange 10, and a driving device 11 for driving the rotation of the flange long pipe fitting 1; a blocking mechanism is arranged in the front protection device 5; in the unblocked state, the working medium in the external pipeline can enter the slurry chamber through the fixing member 4, the connecting device, the flange long pipe fitting 1, and the front protection device 5; in the blocked state, the blocking mechanism blocks the channel for the working medium to flow into in the front protection device 5 to prevent the working medium from flowing from the front protection device 5 into the flange long pipe fitting 1.

[0037] It should be noted that the front end of the flange long pipe fitting 1 mentioned in this application document is the left end of the flange long pipe fitting 1 as shown in Figure 1 and the rear end of the flange long pipe fitting 1 is the right end of the flange long pipe fitting 1 in the direction as shown in Figure 1 described.

[0038] During the use of the cutter head rotary joint of the small-diameter slurry shield tunneling machine provided by this specific embodiment, the driving device 11 drives the rotation of the flange long pipe fitting 1. The front end of the flange long pipe fitting 1 is connected to the front protection device 5, and the front protection device 5 is connected to the cutter head flange 10. Moreover, the rear end of the flange long pipe fitting 1 is connected to the fixing member 4 through the connecting device. Therefore, the fixing member 4 connected with the external pipeline is fixedly arranged. Preferably, the front end of the flange long pipe fitting 1 can be connected to the front protection device 5 through the first bolt group 7. The flange long pipe fitting 1 plays a connecting role in a narrow space, and the flange long pipe fitting 1 is connected to the driving device 11 through the second bolt group 8, and the front protection device 5 is connected to the cutter head flange 10 through the third bolt group 9.

[0039] Under normal circumstances, the working medium enters through the external pipeline connected to the fixing member 4, passes through the fixing member 4, the connecting device, the flange long pipe fitting 1, and the pre-protection device 5 into the slurry chamber, and flushes the central area of the cutter head. When the driving device 11 fails or components such as the seals in the swivel joint fail and need to be disassembled, repaired or replaced, the working medium flowing in the rear external pipeline can be closed. Under the action of the working pressure in the slurry chamber, the blocking mechanism blocks the channel for the working medium to flow into in the pre-protection device 5, preventing the working medium from flowing out of the slurry chamber through the pre-protection device 5, and avoiding the working medium from flowing into the flange long pipe fitting 1 from front to back.

[0040] Compared with the prior art, when the driving device 11 fails or components such as the seals in the swivel joint fail and need to be disassembled, repaired or replaced, the setting of the blocking mechanism can isolate the slurry chamber from the rear equipment. At this time, the driving device 11 can be overhauled or the vulnerable parts of the swivel joint can be replaced, realizing the self-adaptive protection and isolation function of the swivel joint, making the operation process convenient and easy, and not occupying extra space, which can be applied to small-diameter slurry shield machines; in addition, the setting of the blocking mechanism in the pre-protection device 5 creates the required environment for troubleshooting the structures such as the driving device 11, effectively preventing the leakage of the working medium and avoiding the occurrence of safety accidents.

[0041] On the basis of the above embodiment, the pre-protection device 5 can include a device main body 51 provided with a channel, a jet block 53 arranged at one end of the device main body 51 facing the slurry chamber, and a blocking mechanism; the jet block 53 is provided with jet holes 531 for the working medium to spray out, and the jet holes 531 are communicated with the channel; the jet block 53 is connected to the device main body 51.

[0042] As Figure 2 shown, the jet block 53 is connected to the device main body 51 through the fourth bolt group 55, and a channel for communicating the slurry chamber with the flange long pipe fitting 1 is arranged in the device main body 51. The jet block 53 is arranged on the side of the device main body 51 facing the slurry chamber, and the jet block 53 is provided with jet holes 531 for the working medium in the channel to flow out.

[0043] Under normal conditions, the working medium will flow out through the jet holes 531 via the fixing member 4, the connecting device, the flange long pipe fitting 1, and the channel in the device main body 51. After closing the external pipeline on the fixing member 4, under the action of the pressure in the slurry chamber, the working medium will flow reversely, that is, flow from the slurry chamber into the channel of the pre-protection device 5.

[0044] Preferably, the central axis of the jet hole 531 can coincide with the central axis of the channel. When there are multiple jet holes 531, the multiple jet holes 531 can be evenly distributed along the central axis of the corresponding channel.

[0045] It should be noted that only one channel can be provided in the device main body 51, or two, three or more channels can be provided, which is specifically determined according to the actual situation and will not be elaborated here.

[0046] Compared with the prior art, the setting of the jet block 53 enables the working medium to flow out smoothly, and the jet block 53 is detachably connected to the device main body 51, which facilitates the maintenance and replacement of the device.

[0047] Based on the above embodiments, the blocking mechanism may include a blocking member 52 provided on the device main body 51 and a cooperating member 54 movably provided in the channel of the device main body 51; the blocking member 52 is provided with a blocking surface, and the cooperating member 54 is provided with a cooperating surface that cooperates with the blocking surface to block the channel; and along the length direction of the channel, the cooperating member 54 is provided between the blocking member 52 and the jet block 53.

[0048] It should be noted that the blocking member 52 is provided on the device main body 51, which can be provided in the channel of the device main body 51, or at the entrance of the channel of the device main body 51, or at one end of the device main body 51 connected to the flange long pipe fitting 1, which is specifically determined according to the actual situation and will not be elaborated here.

[0049] During use, since the cooperating member 54 is provided between the blocking member 52 and the jet block 53, under normal circumstances, the working medium will flow through the blocking member 52, the cooperating member 54, and the jet block 53 in sequence. During the flow of the working medium, it will push the cooperating member 54 in the direction of the jet block 53, causing the cooperating member 54 to move away from the blocking member 52, so as to avoid the two cooperating to block the channel; when the driving device 11 fails or components such as the seals in the rotary joint need to be disassembled, repaired or replaced, after closing the external pipeline, under the pressure of the mud sump, the working medium will flow from the mud sump to the channel, and during the flow, it will push the cooperating member 54 in the direction of approaching the blocking member 52 until the blocking surface of the blocking member 52 cooperates with the cooperating surface of the cooperating member 54 to achieve the blocking of the channel, avoiding the working medium from flowing out from the front protection device 5.

[0050] In this specific embodiment, the blocking of the channel is achieved by the setting method of the cooperation between the cooperating member 54 and the blocking member 52, which avoids the additional occupation of installation space by the blocking mechanism, and can automatically achieve blocking under the action of the mud sump pressure after closing the external pipeline, and the operation process is convenient.

[0051] Based on the above embodiments, the blocking member 52 may be provided with a through hole for communicating with the channel, and the outer peripheral portion of the blocking member 52 is sealingly connected to the channel, and the blocking surface is an arc surface facing the cooperating member 54; the cooperating member 54 is a spherical structure, and the size of the spherical structure cooperates with the arc surface.

[0052] Preferably, the central axis of the through hole coincides with the central axis of the channel.

[0053] Preferably, the channel can be set as a direction, and the diameter of the fitting 54 is slightly smaller than the side length of the square, so that the fitting 54 can move in the channel, and in the normal state, the working medium can also flow through the edge of the fitting 54 until it flows out from the jet hole 531. Of course, the cross-section of the channel can also be other structures that meet the requirements, which will not be elaborated here.

[0054] On the basis of the above embodiments, a boss 532 can be provided on the side of the jet block 53 facing the channel to prevent the fitting 54 from blocking the jet hole 531, as Figure 2 shown.

[0055] During the use process, when the external pipeline is opened, the working medium pushes the fitting 54 to move towards the jet block 53. When it moves to contact the boss 532, it will no longer move. Since the cross-sectional dimension of the boss 532 is smaller than the cross-sectional dimension of the channel, the working medium can flow out smoothly. Preferably, the jet hole 531 can be provided on the outer peripheral part of the boss 532.

[0056] On the basis of the above embodiments, the connecting device can include a meshing flange 2 meshing and drivingly connected to the rear end of the flange long pipe fitting 1 and a rotating structure 3 connected to the meshing flange 2. The rotating structure 3 is connected to the fixing member 4 through a bearing.

[0057] As Figure 3 shown, a plurality of protrusions can be provided on the outer peripheral part of the rear end of the flange long pipe fitting 1, grooves matching the protrusions are provided on the meshing flange 2, and the meshing flange 2 is sleeved on the outer peripheral part of the flange long pipe fitting 1.

[0058] Preferably, the cross-section of the protrusion can be rectangular, and the number of protrusions is multiple and evenly distributed along the circumferential direction of the flange long pipe fitting 1.

[0059] During the actual use process, the connection method between the flange long pipe fitting 1 and the meshing flange 2 can realize the transmission of torque in a narrow space, and the material and thickness of the flange long pipe fitting 1 can be set according to different rotation speeds and usage conditions, which are specifically determined according to the actual situation.

[0060] On the basis of the above embodiments, a first sealing assembly 61 can be provided between the cutter head flange 10 and the front protection device 5, and a second sealing assembly 62 can be provided between the flange long pipe fitting 1 and the driving device 11 to improve the sealing effect.

[0061] It should be noted that for the first seal and the second seal mentioned in the application document, the first, second, third, and fourth in the first bolt group 7, the second bolt group 8, the third bolt group 9, and the fourth bolt group 55 are only used to distinguish different positions and there is no order of precedence.

[0062] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. Any combination of all the embodiments provided by the present invention falls within the protection scope of this invention and will not be elaborated here.

[0063] The above has introduced in detail the cutter head rotary joint of the small-diameter slurry shield machine provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A cutter head rotary joint for a small-diameter slurry shield tunneling machine, Characterized in that, It includes a flange long pipe fitting (1), a fixing part (4) arranged at the rear end of the flange long pipe fitting (1) and used for installing external pipelines, a connecting device for connecting the fixing part (4) and the flange long pipe fitting (1), a pre-protection device (5) arranged at the front end of the flange long pipe fitting (1) and connected to the cutter head flange (10), and a driving device (11) for driving the flange long pipe fitting (1) to rotate; A blocking mechanism is arranged in the pre-protection device (5); In the unblocked state, the working medium in the external pipeline can enter the slurry chamber through the fixing part (4), the connecting device, the flange long pipe fitting (1), and the pre-protection device (5); In the blocked state, the blocking mechanism blocks the channel in the pre-protection device (5) for the working medium to flow in, to prevent the working medium from flowing into the flange long pipe fitting (1) from the pre-protection device (5); The pre-protection device (5) includes a device main body (51) provided with the channel, a jet block (53) arranged at one end of the device main body (51) facing the slurry chamber, and the blocking mechanism; the jet block (53) is provided with jet holes (531) for jetting the working medium, and the jet holes (531) are communicated with the channel; The jet block (53) is connected to the device main body (51); The blocking mechanism includes a blocking part (52) arranged on the device main body (51) and a cooperating part (54) movably arranged in the channel of the device main body (51); the blocking part (52) is provided with a blocking surface, and the cooperating part (54) is provided with a cooperating surface that cooperates with the blocking surface to block the channel; And along the length direction of the channel, the cooperating part (54) is arranged between the blocking part (52) and the jet block (53); When working normally, the working medium will flow through the blocking part (52), the cooperating part (54), and the jet block (53) in sequence, and the working medium pushes the cooperating part (54) to move in the direction of the jet block (53) during the flowing process; When the driving device (11) fails or the seal fails, the working medium flows from the slurry chamber to the channel, and pushes the cooperating part (54) to move in the direction close to the blocking part (52), until the blocking surface of the blocking part (52) cooperates with the cooperating surface of the cooperating part (54) to realize the blocking of the channel; The blocking part (52) is provided with a through hole for communicating with the channel, and the outer peripheral part of the blocking part (52) is hermetically connected to the channel, and the blocking surface is an arc surface arranged facing the cooperating part (54); The cooperating part (54) is a spherical structure, and the size of the spherical structure cooperates with the arc surface; A boss (532) is arranged on one side of the jet block (53) facing the channel to prevent the cooperating part (54) from blocking the jet holes (531); The connecting device includes a meshing flange (2) meshed and drivingly connected to the rear end of the flange long pipe fitting (1), and a rotating structure (3) connected to the meshing flange (2). The rotating structure (3) is connected to the fixing member (4) through a bearing.

2. The cutter head rotary joint of the small-diameter slurry shield machine according to claim 1, wherein, the cross-section of the channel is square.

3. The cutter head rotary joint of the small-diameter slurry shield machine according to claim 1, wherein, a plurality of protrusions are provided on the outer peripheral portion of the rear end of the flange long pipe fitting (1), the meshing flange (2) is provided with grooves matching the protrusions, and the meshing flange (2) is sleeved on the outer peripheral portion of the flange long pipe fitting (1).

4. The cutter head rotary joint of the small-diameter slurry shield machine according to claim 3, wherein, the cross-section of the protrusion is rectangular, and the number of the protrusions is multiple and evenly distributed along the circumferential direction of the flange long pipe fitting (1).

5. The cutter head rotary joint of the small-diameter slurry shield machine according to any one of claims 1-4, wherein, a first sealing assembly (61) is provided between the cutter head flange (10) and the front protection device (5), and a second sealing assembly (62) is provided between the flange long pipe fitting (1) and the driving device (11).

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