A mud water shield machine flushing pipeline blockage clearing device and method

Abstract

The application discloses a kind of slurry shield machine flushing pipeline clearing device and method, slurry shield machine flushing pipeline clearing device includes: flushing pipeline system;Flush water gun, connected with flushing pipeline system, end has flushing connector;Clearing valve body, center is equipped with waterway passage, one end is connected with flushing connector, other end is equipped with pipe head connection structure.The application provides flushing water flow using flushing pipeline system, then flushes flushing pipeline using flush water gun, clearing valve body is detachably connected with flushing pipeline using pipe head connection structure, flush water gun is detachably connected with clearing valve body using flushing connector, so that flushing is needed, assemble to flush flushing pipeline, when clearing is completed, it can be disassembled, without affecting the normal work of flushing pipeline, and disassembled flushing pipeline of other equipment can be flushed, it is convenient to move, instead of manual operation clearing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of maintenance equipment of slurry shield tunneling machine, in particular to a flushing pipeline unblocking device and method of slurry shield tunneling machine. BACKGROUND

[0002] The slurry balance shield tunneling machine is a special engineering machinery for tunneling, which has the functions of excavating and cutting soil, transporting sludge, assembling tunnel lining, etc., and has been widely used in subway, railway, highway, municipal, water and electricity tunnel engineering. The cutter head of the slurry balance shield tunneling machine is easy to accumulate mud cake during tunneling. The mud cake phenomenon is serious in clay siltstone, silty clay and other cohesive strata. The mud cake will increase the load of the cutter head and the cutter, causing the cutter head and the cutter to wear out, increasing the consumption of the cutter, and in severe cases, the cutter head will lose the ability to excavate, which will greatly threaten the speed of shield tunneling and construction safety, and delay the construction period. Therefore, a flushing pipeline is provided to flush the cutter head to reduce the problem of mud cake accumulation. However, the flushing pipeline is also easy to be blocked by mud during use. Therefore, the flushing pipeline needs to be unblocked in time, otherwise the problem of mud cake accumulation will be further aggravated. However, the current unblocking of the flushing pipeline usually adopts manual cleaning or manual unblocking by inserting tools into the pipeline, which is troublesome and the traditional manual cleaning method cannot achieve the unblocking of the flushing pipeline. SUMMARY

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a flushing pipeline unblocking device for slurry shield tunneling machine, which can conveniently achieve the unblocking of the flushing pipeline.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0005] A flushing pipeline unblocking device for slurry shield tunneling machine, comprising: a flushing pipeline system for providing flushing water flow outward; a flushing water gun connected with the flushing pipeline system to obtain the flushing water flow, having a flushing connector at the end, the flushing connector is provided with a flushing spray pipe extending outward; a unblocking valve body is provided with a water channel in the center, one end is detachably connected with the flushing connector, the other end is provided with a pipe head connection structure which is detachably connected with the flushing pipeline, a pressure relief pipe is arranged in the wall of the unblocking valve body and is in communication with the water channel, a control valve is installed on the pressure relief pipe, and a pressure gauge is installed on the unblocking valve body to monitor the medium pressure in the water channel.

[0006] Further, the flushing connector comprises a tapered head arranged at the end, the clear block valve body is provided with a connecting pipe in communication with the water channel, the outer end of the connecting pipe is detachably connected with an adapter, the adapter is provided with a flow passage in the center in communication with the water channel, the flow passage is provided with a tapered surface matched with the tapered head, and the first sealing ring is arranged between the tapered head and the tapered surface.

[0007] Further, the flushing connector comprises a tapered head arranged at the end, the clear block valve body is provided with a connecting pipe in communication with the water channel, the outer end of the connecting pipe is detachably connected with an adapter, the adapter is provided with a flow passage in the center in communication with the water channel, the flow passage is provided with a tapered surface matched with the tapered head, and the first sealing ring is arranged between the tapered head and the tapered surface.

[0008] Further, the outer end of the pressing groove is provided with an inwardly protruding stopper, the inner end of the positioning column is provided with an outwardly protruding limiting protruding ring, the limiting protruding ring is embedded in the pressing groove and located on the inner side of the stopper, the limiting protruding ring is used for abutting against the stopper to limit the stroke of the positioning column extending out of the pressing groove, and the compression spring is arranged between the inner end of the positioning column and the pressing groove.

[0009] Further, the adapter comprises a threaded connection section, a transition shaft section and a limiting shaft section which are coaxially connected in sequence and have diameters increasing in sequence; the threaded connection section is threadedly connected to the inner wall of the connecting pipe, the positioning hole is arranged on the peripheral wall of the transition shaft section, and the limiting shaft section has an outer peripheral diameter larger than the connecting pipe; the transition shaft section is rotatably sleeved with a movable ring, the movable ring is provided with a connecting barrel extending towards the flushing lance, the flushing connector comprises a threaded shaft section connected to the inner end of the positioning shaft section, the diameters of the tapered head, the positioning shaft section and the threaded shaft section increase in sequence, the inner wall of the connecting barrel is provided with threads for threadedly connecting with the threaded shaft section, so that the movable ring abuts against one side of the limiting shaft section away from the flushing lance.

[0010] Further, when the movable ring abuts against one side of the limiting shaft section away from the flushing lance, the movable ring closes the outer end of the positioning hole.

[0011] Further, the flushing pipeline system comprises a booster pump, an overflow valve and an electric control pressure reducing valve connected in sequence; the outlet of the booster pump is connected with the overflow valve; the electric control pressure reducing valve is used for adjusting the required flushing pressure; and the overflow valve is configured to start overflowing when the pipeline pressure of the flushing pipeline system reaches the set pressure of the overflow valve, so as to prevent the pipeline pressure of the flushing pipeline system from being too high.

[0012] Further, the pipe head connecting structure is a flange plate, and a plurality of connecting holes are distributed around the flange plate.

[0013] The application further provides a method for clearing blockage of a flushing pipeline of a slurry shield machine.

[0014] S1, the clear block valve body, flushing water gun, flushing pipeline system are connected in turn; after closing the flushing pipeline stop valve, the water inlet flushing pipe on the flushing pipeline is disassembled, and the flushing pipeline is connected through the pipe head connection structure;

[0015] S2, control valve is closed, flushing pipeline system is opened, flushing water gun outputs water flow to water channel, initial flushing water pressure of flushing water gun is set, flushing is started, and a preset flushing time T1 is passed;

[0016] S3, the pressure value P1 of the pressure gauge and the flushing water pressure P of the flushing water gun are obtained, and it is judged whether P1 is greater than aP: if yes, the flushing pipeline is not completely dredged, the control valve is opened, the flushing is continued and the flushing water pressure and / or the flushing time is increased, after the flushing time, the step S3 is returned; if no, the pipeline has been dredged, the flushing is stopped after continuing to flush for a first preset time T2, and complete dredging is ensured; wherein a is a set judgment coefficient.

[0017] Further, in step S3, it is judged whether the increased flushing water pressure P is greater than the set pressure P2 of the overflow valve of the flushing pipeline system:

[0018] If yes, the flushing water pressure P is adjusted to P2 and the flushing time is increased;

[0019] If no, the flushing is carried out with the increased flushing water pressure P;

[0020] It is judged whether the increased flushing time is greater than a preset threshold value:

[0021] If yes, the flushing is stopped, and the flushing pipeline is maintained;

[0022] If no, the flushing is continued.

[0023] The present application has the following beneficial effects:

[0024] The flushing pipeline system provides flushing water flow, and the flushing water gun is used for flushing the flushing pipeline, the clear block valve body is detachably connected with the flushing pipeline through the pipe head connection structure, and the flushing water gun is detachably connected with the clear block valve body through the flushing connector, so that when flushing is needed, the flushing pipeline is assembled and flushed, and when the blockage is cleared, the flushing pipeline is disassembled, the normal work of the flushing pipeline is not affected, and the flushing pipeline of other equipment can be flushed after disassembly, which is convenient to move and replaces manual operation for clearing blockage; in addition, when the water pressure of the flushing pipeline is large, the pressure relief pipe can be opened through the control valve to release pressure.

[0025] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate the preferred embodiments of the application and assist in

[0027] Figure 1 is the overall structure schematic diagram of the mud water shield tunneling machine flushing pipeline blockage cleaning device of the present application;

[0028] Figure 2 is the connection structure schematic diagram of the blockage cleaning valve body and the adapter;

[0029] Figure 3 is the exploded state structure schematic diagram of Figure 2 ;

[0030] Figure 4 is the structure schematic diagram of the flushing water gun;

[0031] Figure 5 is the connection structure sectional view of the flushing connector, the adapter and the connecting pipe;

[0032] Figure 6 is the enlarged view of A of Figure 5 ;

[0033] Figure 7 is the structure schematic diagram of the mud water shield tunneling machine flushing pipeline blockage cleaning method of the present application;

[0034] Figure 8 is the structure schematic diagram of the flushing pipeline.

[0035] Legend:

[0036] Flushing pipeline system 100, booster pump 110, overflow valve 120, electric control pressure reducing valve 130, proportional throttle valve 140;

[0037] Flushing water gun 200, flushing connector 210, conical head 211, positioning shaft section 212, threaded shaft section 213; flushing nozzle 220, pressing groove 230, positioning column 231, stopper 232, limiting annular 233, limiting column 234, compression spring 240;

[0038] Blockage cleaning valve body 300, waterway passage 310, pipe head connection structure 320, connecting hole 321, pressure relief pipe 330, control valve 340, pressure gauge 350, connecting pipe 360;

[0039] Adapter 400, conical surface 410, first sealing ring 411, positioning hole 420, threaded connection section 430, transition shaft section 440, limiting shaft section 450, movable ring 460, connecting cylinder 461;

[0040] The flushing pipe 500, the water inlet flushing pipe 510, the flange plate 520, and the water stop valve 530. DETAILED DESCRIPTION

[0041] It should be understood that the specific embodiments described herein are merely exemplary and do not limit the present application.

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0044] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person of ordinary skill in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0045] Please refer to Figure 1 and Figure 2 In a preferred embodiment of the present application, a flushing pipe system of a slurry shield tunneling machine is provided, which comprises a flushing pipe system 100, a flushing water gun 200, and a flushing valve body 300.

[0046] The flushing pipe system 100 is used to provide an external flushing water flow; the flushing water gun 200 is connected with the flushing pipe system 100 to obtain the flushing water flow, and the flushing water gun 200 has a flushing connector 210 at the end. Specifically, one end of the flushing water gun 200 is connected with the flushing pipe system 100 through a hose, and the other end is provided with the flushing connector 210. The flushing connector 210 is provided with a flushing spray pipe 220 extending outward.

[0047] The water channel 310 is arranged in the center of the blockage cleaning valve body 300, the blockage cleaning valve body 300 is detachably connected with the flushing connector 210 at one end, and the other end is provided with a pipe head connecting structure 320 which is detachably connected with the flushing pipeline, a pressure relief pipe 330 which is in communication with the water channel 310 is arranged in the peripheral wall of the blockage cleaning valve body 300, and a control valve 340 is arranged on the pressure relief pipe 330, so as to realize electric control, and the control valve 340 can be an electromagnetic valve. The pressure gauge 350 is arranged on the blockage cleaning valve body 300, so as to monitor the medium pressure in the water channel 310, since the water channel 310 is in communication with the pressure relief pipe 330 and the pressures are the same, the pressure gauge 350 can be connected on the peripheral wall of the water channel 310 or the pressure relief pipe 330, and the medium pressure in the water channel 310 can be monitored.

[0048] The blockage cleaning device for the flushing pipeline of the slurry shield machine provided by the application utilizes the flushing pipeline system 100 to provide a flushing water flow, and then utilizes the flushing water gun 200 to flush the flushing pipeline, the blockage cleaning valve body 300 is detachably connected with the flushing pipeline through the pipe head connecting structure 320, and the flushing water gun 200 is detachably connected with the blockage cleaning valve body 300 through the flushing connector 210, so that when flushing is needed, the flushing pipeline can be assembled and flushed, and when the blockage cleaning is completed, the blockage cleaning device can be detached, so as not to affect the normal work of the flushing pipeline, and the flushing pipeline of other equipment can be flushed after being detached, so that the blockage cleaning device is convenient to move and replaces manual operation. In addition, when the water pressure of the flushing pipeline is large, the pressure relief pipe 330 can be opened through the control valve 340 to release pressure.

[0049] With reference to Figure 4 and Figure 5 In some embodiments of the application, the flushing connector 210 comprises a tapered head 211 arranged at the end, one end of the blockage cleaning valve body 300 is provided with a connecting pipe 360 which is in communication with the water channel 310, and the outer end of the connecting pipe 360 is detachably connected with an adapter 400, the adapter 400 is provided with a flow passage in the center which is in communication with the water channel 310, and the flow passage is provided with a tapered surface 410 which is matched with the tapered head 211, the flushing connector 210 is inserted into the flow passage, and the tapered head 211 and the tapered surface 410 are clamped with the first sealing ring 411 therebetween, so as to improve the connection sealing performance, avoid pressure relief water leakage, and improve the sealing performance compared with the plane contact of the tapered head 211 and the tapered surface 410.

[0050] With reference to Figure 5 and Figure 6In some embodiments of the present application, the flushing connector 210 comprises a positioning shaft segment 212 connected to the inner end of the tapered head 211, and a pressing groove 230 is arranged on the peripheral wall of the positioning shaft segment 212, and a positioning column 231 is elastically movably arranged in the pressing groove 230, and the adapter 400 is provided with a positioning hole 420 matched with the positioning column 231, and the positioning column 231 is elastically clamped in the positioning hole 420, so that the flushing connector 210 and the adapter 400 are connected and positioned, and the adapter 400 and the flushing connector 210 cannot rotate relative to each other, thereby improving the assembly precision, and also achieving the effect of pre-positioning, facilitating the subsequent connection and assembly. The positioning column 231 can be elastically retracted into the pressing groove 230 under the action of an external force, so as to separate the flushing connector 210 from the adapter 400.

[0051] With reference to Figure 6 In further embodiments of the present application, the pressing groove 230 is provided with an inwardly protruding stop portion 232 at the outer end, and the inner end of the positioning column 231 is provided with an outwardly protruding limiting protruding ring 233, the limiting protruding ring 233 is embedded in the pressing groove 230 and located inside the stop portion 232, and the limiting protruding ring 233 is used to abut against the stop portion 232 to limit the stroke of the positioning column 231 extending out of the pressing groove 230; that is, the hole position formed in the center of the stop portion 232 has a diameter larger than that of the positioning column 231 but smaller than that of the limiting protruding ring 233, so as to limit the formation of the limiting protruding ring 233 and the positioning column 231, and avoid the positioning column 231 from being popped out of the pressing groove 230. A compression spring 240 is arranged between the inner end of the positioning column 231 and the pressing groove 230, so as to provide an elastic outward force to the positioning column 231, so that when the positioning column 231 is aligned with the positioning hole 420, it can be automatically popped into the positioning hole 420. In order to further improve the installation stability of the compression spring 240, a limiting column 234 is arranged at the bottom of the positioning column 231, so that the end portion of the compression spring 240 is sleeved.

[0052] With reference to Figure 3 and Figure 6In further embodiments of the present application, the adapter 400 comprises a threaded connecting section 430, a transition shaft section 440 and a limiting shaft section 450 coaxially connected in sequence and increasing in diameter in sequence; the threaded connecting section 430 is threadedly connected to the inner wall of the connecting pipe 360, and the positioning hole 420 is arranged on the peripheral wall of the transition shaft section 440; the outer periphery of the transition shaft section 440 is rotatably sleeved with a movable ring 460, and the outer periphery of the movable ring 460 is provided with a connecting barrel 461 extending towards the flushing lance 200; the flushing adapter 210 comprises a threaded shaft section 213 connected to the inner end of a positioning shaft section 212, and the conical head 211, the positioning shaft section 212 and the threaded shaft section 213 are coaxially connected in sequence and increasing in diameter in sequence; the inner wall of the connecting barrel 461 is provided with threads for threadedly connecting with the threaded shaft section 213, the internal threads of the inner wall of the connecting barrel 461 are adapted to the external threads of the threaded shaft section 213, and the outer periphery of the limiting shaft section 450 is larger in diameter than the connecting pipe 360, so that the movable ring 460 abuts against the side of the limiting shaft section 450 away from the flushing lance 200; when installed, the connecting barrel 461 is threadedly connected with the threaded shaft section 213, and the movable ring 460 abuts against the limiting shaft section 450, so as to tightly attach the limiting shaft section 450 and the threaded shaft section 213, and to tightly connect the adapter 400 with the flushing adapter 210, thereby ensuring the sealing property; in addition, when installed, the positioning column 231 is elastically clamped into the positioning hole 420, so as to connect and position the flushing adapter 210 with the adapter 400, so that the adapter 400 and the flushing adapter 210 cannot rotate relative to each other, thereby achieving the effect of pre-positioning, and then the connecting barrel 461 is screwed, so as to avoid the interference of the relative rotation of the adapter 400 and the flushing adapter 210 with the thread connection of the connecting barrel 461. In addition, sealing rings can be clamped between the limiting shaft section 450 and the threaded shaft section 213 and between the transition shaft section 440 and the connecting pipe 360, so as to improve the sealing performance. In addition, in order to reduce structural interference, the inner periphery of the connecting barrel 461 is larger in diameter than the transition shaft section 440, so as to bypass the transition shaft section 440 and connect the threaded shaft section 213. Since the movable ring 460 is rotatably sleeved on the transition shaft section 440, the adapter 400 and the flushing adapter 210 do not need to rotate relative to each other during connection, so that the installation and dismounting are more convenient, and the pipelines connected to the flushing adapter 210 and the clear-out valve body 300 do not rotate during installation and dismounting, thereby greatly facilitating the installation and dismounting, and finally installing the connection of the clear-out valve body 300 and the flushing adapter 210.

[0053] Referring to Figure 6In further embodiments of the present application, when the movable ring 460 abuts against the side of the limiting shaft segment 450 facing away from the flushing gun 200, the movable ring 460 closes the outer end of the positioning hole 420, i.e. the inner diameter of the movable ring 460 is adapted to the outer peripheral wall of the transition shaft segment 440. In order to reduce the movable resistance, a clearance fit can be adopted. The movable ring 460 closing the outer end of the positioning hole 420 can reduce the dust entering the positioning hole 420 and the pressing groove 230 to affect the movement of the positioning column 231, thereby causing the installation and disassembly to be troublesome.

[0054] With reference to Figure 1 In further embodiments of the present application, the flushing pipeline system 100 comprises a booster pump 110, an overflow valve 120 and an electrically controlled pressure reducing valve 130 connected in sequence. The outlet of the booster pump 110 is connected with the overflow valve 120, and the inlet is connected with a water source or a water inlet pipeline. The electrically controlled pressure reducing valve 130 is used to adjust the required flushing pressure. The overflow valve 120 is configured to start overflowing when the pipeline pressure of the flushing pipeline system 100 reaches the set pressure of the overflow valve 120, so as to prevent the pipeline pressure of the flushing pipeline system 100 from being too high. In addition, multiple flushing guns 200 and unblocking valve bodies 300 can be provided to realize the unblocking of multiple flushing pipelines. For this purpose, a proportional throttle valve 140 is provided between the electrically controlled pressure reducing valve 130 and each flushing gun 200, and the flow into each flushing gun 200 can be adjusted as required.

[0055] With reference to Figure 2 In further embodiments of the present application, the pipe head connecting structure 320 is a flange plate, and a plurality of connecting holes 321 are distributed around the flange plate. Specifically, the connecting hole 321 is a waist-shaped hole to improve the adaptability, and eight connecting holes 321 are distributed around to improve the connection tightness.

[0056] In order to realize visual operation, a touch display screen, a control switching button and a handle are provided on the flushing gun 200. A one-way valve is provided inside the flushing gun 200, and a manual switch and a normally closed electromagnetic valve are respectively provided on two pipelines inside the flushing gun 200. A pressure flow detection unit is also provided inside the flushing gun 200. It can be understood that the present application can also be matched with a control system, and the control system is connected with the normally closed electromagnetic valve, the control valve 340, the pressure flow detection unit, the pressure gauge 350 and other electronic components, so as to obtain information and control the corresponding components to work.

[0057] With reference to Figure 7 And Figure 8 The present application is a method for unblocking the flushing pipeline of a slurry shield tunneling machine, comprising the following steps:

[0058] S1, connect the clear block valve body 300, the flushing water gun 200, the flushing pipeline system 100 in turn; after closing the water stop valve 530 of the flushing pipeline 500, disassemble the water inlet flushing pipe 510 on the flushing pipeline 500, connect the pipe head connection structure 320 with the flushing pipeline 500, that is, connect the pipe head connection structure 320 with the flange plate 520 on the flushing pipeline 500 through bolt pipeline butt joint.

[0059] S2, control valve 340 is closed, flushing pipeline system 100 is opened, flushing water gun 200 outputs water flow to waterway channel 310, sets the initial flushing water pressure of flushing water gun 200, starts flushing, and passes through the preset flushing time T1.

[0060] S3, obtain the pressure value P1 of the pressure gauge 350 and the flushing water pressure P of the flushing water gun 200, and the initial value of the flushing water pressure P is the initial set flushing water pressure; whether P1 is greater than aP is judged:

[0061] If yes, the flushing pipeline is not completely dredged, the control valve is opened, the flushing is continued and the flushing water pressure and / or the flushing time of the flushing water gun 200 are increased, so that the flushing is further carried out, the flushing effect can be improved by increasing the flushing time and the flushing water pressure, after the flushing time, the control valve is closed, the flushing water gun 200 continues to flush, when the pressure value P1 of the pressure gauge 350 and the flushing water pressure P value of the flushing water gun 200 are stable, return to step S3, continue to judge whether the pipeline is dredged through pressure monitoring and comparison;

[0062] If no, the pipeline has been dredged, continue to flush for the first preset time T2 and stop flushing to ensure complete dredging; wherein a is a set judgment coefficient, wherein a is a set judgment coefficient, for example, a is 0.1, which means that when P1 value is much smaller than P, it means that the pipeline is dredged.

[0063] In order to realize the logical control of the increase of the flushing water pressure and the flushing time, the flushing water pressure P = ρ i , ρ i represents the flushing water pressure of the i-th execution of step S3, i = 1, 2, 3,..., ρ i+1 = βρ i , β is the water pressure increase coefficient, for example, β is 1.5, that is, the increased flushing water pressure is 1.5 times of the last flushing water pressure, the flushing time can also be increased by the above-mentioned increase logic.

[0064] In further embodiments of the application, in step S3, whether the increased flushing water pressure P is greater than the set pressure P2 of the overflow valve of the flushing pipeline system is judged:

[0065] If yes, adjust the flushing water pressure P to P2 and increase the flushing time;

[0066] If not, the increased flushing water pressure P is kept for flushing;

[0067] If not, the increased flushing time is kept for flushing.

[0068] If yes, the flushing is stopped and the flushing pipeline is maintained.

[0069] If not, the flushing is continued.

[0070] If not, the increased flushing time is kept for flushing.

[0071] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for clearing a blockage in a flushing line of a slurry shield machine, characterized in that The utility model relates to a kind of flushing systems, comprising: Flush pipeline system (100) for providing flushing water flow outwardly; Flush lance (200) is connected with flush pipeline system (100) to obtain flushing water flow, and end has flush connector (210), and the flush connector (210) is provided with flush nozzle (220) extending outwardly; Clearing valve body (300) is provided with water channel (310) in the center, one end is detachably connected with flush connector (210), the other end is provided with pipe head connecting structure (320) detachably connected with flush pipeline, and the peripheral wall is provided with pressure relief pipe (330) communicated with water channel (310), and control valve (340) is installed on the pressure relief pipe (330), and pressure gauge (350) is installed on the clearing valve body (300) to monitor the medium pressure in water channel (310); The flush pipeline system (100) includes overflow valve (120);The overflow valve (120) is configured: when the pipeline pressure of flush pipeline system (100) reaches the set pressure of overflow valve (120), the overflow valve (120) starts to overflow, to prevent the pipeline pressure of flush pipeline system (100) from being too high; The flush connector (210) includes tapered head (211) arranged at the end, and the one end of the clearing valve body (300) is provided with connecting pipe (360), the connecting pipe (360) is communicated with water channel (310), and the outer end of the connecting pipe (360) is detachably connected with adapter (400), the adapter (400) is provided with overflow passage communicated with water channel (310) in the center, the overflow passage is provided with taper surface (410) matched with tapered head (211), and the first sealing ring (411) is arranged between the tapered head (211) and the taper surface (410).

2. The slurry shield tunneling machine washout line unclogging device of claim 1, wherein, The flush connector (210) includes positioning shaft section (212) connected to the inner end of tapered head (211), the peripheral wall of the positioning shaft section (212) is provided with pressing groove (230), the positioning column (231) is elastically movably mounted in the pressing groove (230), the peripheral wall of the adapter (400) is provided with positioning hole (420) matched with the positioning column (231), the positioning column (231) is elastically clamped into the positioning hole (420), and the positioning column (231) can be elastically retracted into the pressing groove (230) under the action of external force.

3. The slurry shield tunneling machine washout line unclogging device of claim 2, wherein, The outer end of the pressing groove (230) is provided with stop block (232) protruding towards the inside, the inner end of the positioning column (231) is provided with limit protruding ring (233) protruding towards the outside, the limit protruding ring (233) is embedded in the pressing groove (230) and located on the inside of the stop block (232), and the limit protruding ring (233) is used for abutting against the stop block (232) to limit the stroke of the positioning column (231) extending out of the pressing groove (230);Spring (240) is installed between the inner end of the positioning column (231) and the pressing groove (230).

4. A washout pipe blockage clearing device for an epichloe according to claim 2 or 3, characterised in that, The adapter (400) comprises a threaded connection section (430), a transition shaft section (440) and a limiting shaft section (450) coaxially connected in sequence and with diameters increasing in sequence; the threaded connection section (430) is threadedly connected to the inner wall of the connecting pipe (360), and the positioning hole (420) is arranged on the peripheral wall of the transition shaft section (440); the limiting shaft section (450) has a diameter greater than the connecting pipe (360); the transition shaft section (440) is rotatably sleeved with a movable ring (460) on the outer periphery, the movable ring (460) is provided with a connecting barrel (461) extending towards the flushing water gun (200) on the outer periphery, and the flushing connector (210) comprises a threaded shaft section (213) connected to the inner end of the positioning shaft section (212); the tapered head (211), the positioning shaft section (212) and the threaded shaft section (213) have diameters increasing in sequence; the inner wall of the connecting barrel (461) is provided with threads to be threadedly connected with the threaded shaft section (213), so that the movable ring (460) abuts against one side of the limiting shaft section (450) away from the flushing water gun (200).

5. The slurry shield tunneling machine washout line unclogging device of claim 4, wherein, When the movable ring (460) abuts against one side of the limiting shaft section (450) away from the flushing water gun (200), the movable ring (460) closes the outer end of the positioning hole (420).

6. The slurry shield tunneling machine washout line jam clearing device of claim 1, wherein, The flushing pipeline system (100) comprises a booster pump (110), an overflow valve (120) and an electric control pressure reducing valve (130) connected in sequence; the outlet of the booster pump (110) is connected with the overflow valve (120); and the electric control pressure reducing valve (130) is used for adjusting the required flushing pressure.

7. The slurry shield tunneling machine washout line jam clearing device of claim 1, wherein, The pipe head connecting structure (320) is a flange plate, and a plurality of connecting holes (321) are distributed around the flange plate.

8. A method for clearing blockages in the flushing pipeline of a slurry shield tunneling machine, characterized in that, The slurry shield tunnel flushing pipeline blockage clearing device according to any one of claims 1 to 7 comprises the following steps: S1, sequentially connecting the blockage clearing valve body (300), the flushing water gun (200) and the flushing pipeline system (100); after closing the water stop valve (530) of the flushing pipeline, disassembling the water inlet flushing pipe (510) on the flushing pipeline, and connecting the flushing pipeline through the pipe head connecting structure (320); S2, closing the control valve (340), starting the flushing pipeline system (100), and outputting water flow from the flushing water gun (200) to the water channel (310); setting the initial flushing water pressure of the flushing water gun (200), starting flushing, and continuing for a preset flushing time T1; S3, obtaining the pressure value P1 of the pressure gauge (350) and the flushing water pressure P of the flushing water gun (200), and determining whether P1 is greater than aP: If yes, the flushing pipeline is not completely unblocked, the control valve is opened, the flushing is continued, and the flushing water pressure and / or the flushing time is increased; after the flushing time, the step S3 is returned to; If no, the pipeline is unblocked, the flushing is stopped after continuing for a first preset time T2, and the complete unblocking is ensured; wherein a is a set judgment coefficient.

9. The method according to claim 8, characterized in that, In step S3, it is determined whether the increased flushing water pressure P is greater than the set pressure P2 of the overflow valve of the flushing pipeline system: If yes, the flushing water pressure P is adjusted to P2 and the flushing time is increased. If no, keep the increased flush water pressure P to flush; Judge whether the increased flush duration is greater than a preset threshold: If yes, stop flushing and maintain the flush pipeline; If no, continue flushing.

Images