Tunneling machine mud conduit pigging valve and method of use

Abstract

The application discloses a shield machine mud pipeline cleaning valve and particularly relates to the technical field of shield machine mud pipeline cleaning, which comprises an inlet pipeline, an outlet pipeline, a ball launching mechanism, a main sealing plate and a secondary sealing plate in sliding connection with the main sealing plate, a dynamic sealing accommodation groove is formed in the bottom of the secondary sealing plate, and a dynamic sealing assembly is further arranged; a pushing assembly is arranged for pushing the secondary sealing plate to slide on the top of the main sealing plate; the inlet pipeline comprises a hard section which is connected with the secondary sealing plate, an auxiliary cleaning assembly is arranged in the hard section, the auxiliary cleaning assembly can promote mud flow when the mud is discharged, can clean the mud between the inlet pipeline and the main sealing plate, can clean the hard section, and can enhance the sealing performance between the dynamic sealing assembly and the main sealing plate when the outlet pipeline is blocked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield machine mud pipeline cleaning, more particularly, the present application relates to a shield machine mud pipeline pigging valve and a use method thereof. BACKGROUND

[0002] The shield machine is widely used in modern tunnel engineering construction. When the slurry balance shield machine works, the soil scraped by the cutter head enters the slurry tank, and the rear continuously injects the prepared slurry to form a slurry mixture for transmission in the pipeline. However, in the actual construction process, the particulate matter in the slurry is easy to adhere and deposit on the inner wall of the pipeline, which will cause the inner diameter of the pipeline to become smaller and the flow resistance to increase over time, affecting the normal transportation of the slurry, and even causing pipeline blockage, delaying construction progress and increasing construction cost.

[0003] A shield machine mud pipeline plate type reversing pigging valve is disclosed in Chinese Patent No. CN212643871U, which comprises an outlet pipeline, an inlet pipeline and a ball launching cylinder pipeline. The inlet pipeline and the ball launching cylinder pipeline are connected to the outlet pipeline through a flat plate type reversing device composed of a main sealing plate and a secondary sealing plate to realize three-way switching, so that the center line of the channel after the inlet pipeline and the ball launching cylinder pipeline are switched to be connected to the outlet pipeline coincides. The product has the advantages of smooth and reliable launching and receiving of the pigging ball, small installation space, easy disassembly and maintenance, etc. It is suitable for the pigging valve of the shield machine mud pipeline.

[0004] The above product has some problems in use, such as although it has the advantages of smooth and reliable launching and receiving of the pigging ball, easy disassembly and maintenance, etc., but during normal slurry discharge, it is easy to be blocked, and when the pipeline is blocked, the slurry is easy to overflow from the joint between the inlet pipeline and the flat plate reversing device, which increases the wear during the reversing process, thereby affecting the sealing performance. At the same time, during the reversing process, the slurry in the inner wall of the inlet pipeline is easy to enter the gap between the inlet pipeline and the flat plate reversing device, which increases the wear, thereby affecting the sealing performance. At the same time, the above patent can only clean the outlet pipeline, but cannot clean the inlet pipeline.

[0005] Therefore, the above product needs to be further improved, and a shield machine mud pipeline pigging valve and a use method thereof are proposed to solve the above problems. SUMMARY

[0006] In order to overcome the above-mentioned defects of the prior art, the present application provides a shield machine mud pipeline pigging valve and a use method thereof to solve the problems raised in the background art.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a mud pipeline cleaning valve of a shield machine, comprising an inlet pipeline, an outlet pipeline, a ball launching mechanism, a main sealing plate and a secondary sealing plate in sliding connection with the main sealing plate, a dynamic sealing accommodation groove being formed in the bottom of the secondary sealing plate, and a dynamic sealing assembly being arranged in the sealing accommodation groove and used for sealing the joint of the main sealing plate and the secondary sealing plate;

[0008] A pushing assembly is arranged for pushing the secondary sealing plate to slide on the top of the main sealing plate;

[0009] The inlet pipeline comprises a hard section connected with the secondary sealing plate, and an auxiliary cleaning assembly is arranged in the hard section, which can promote the flow of mud when the mud is discharged, can clean the mud between the inlet pipeline and the main sealing plate, can clean the hard section, and can enhance the sealing between the dynamic sealing assembly and the main sealing plate when the outlet pipeline is blocked.

[0010] Preferably, the auxiliary cleaning assembly comprises a spiral flow channel formed in the side wall of the hard section, and the bottom of the spiral flow channel is connected with an air charging system with adjustable air pressure through a first air charging valve and a flow sensor;

[0011] A vibrating component is arranged in the hard section, which can vibrate when air flows through the spiral flow channel;

[0012] A first annular flow channel is formed in the bottom of the spiral flow channel;

[0013] A second annular flow channel is formed in the top of the spiral flow channel;

[0014] A plurality of oblique jet holes are arranged in the side wall of the second annular flow channel in an array, so that the second annular flow channel is connected with the inner cavity of the inlet pipeline;

[0015] A communication flow channel is formed in the bottom of the first annular flow channel, which is used for connecting the first annular flow channel with the sealing accommodation groove;

[0016] A stop valve is arranged at the end of the outlet pipeline away from the inlet pipeline;

[0017] A second air charging valve is connected with the air charging system through a connecting pipe and is arranged at the end of the outlet pipeline away from the inlet pipeline.

[0018] Preferably, the inlet pipeline further comprises a flexible section arranged on the top of the hard section;

[0019] A contraction part is arranged on the inner wall of the top of the hard section, which is used for preventing the cleaning ball of the ball launching mechanism from entering the flexible section.

[0020] Preferably, the ball launching mechanism comprises a ball launching pipeline, a ball pipe cover and a cleaning ball arranged in the ball launching pipeline;

[0021] The top peripheral wall of the ball launching pipe is communicated with the inflation system and the atmosphere through a three-way control valve.

[0022] Preferably, the pushing assembly is a telescopic rod, one end of which is connected with the main sealing plate and the other end of which is connected with the auxiliary sealing plate.

[0023] Preferably, the vibrating component comprises a plurality of air passages formed in the inner wall of the spiral flow channel and communicated with the atmosphere, each of the air passages is provided with an elastic member, one end of the elastic member away from the spiral flow channel is provided with a sliding member in sealing sliding connection with the air passage, and the air passage away from the spiral flow channel is threadedly connected with a blocking ring.

[0024] Preferably, the ball launching pipe further comprises a limiting assembly arranged at the bottom of the ball launching pipe for limiting the position of the cleaning ball.

[0025] Preferably, the dynamic sealing assembly comprises an inner sealing member arranged in the sealing receiving groove and an outer sealing member arranged outside the inner sealing member and located at the bottom of the communicating flow channel, and the top of the outer sealing member is provided with an elastic component.

[0026] The application further provides a method for using the mud pipe cleaning valve of the shield machine.

[0027] Step one: by controlling the pushing assembly, the inlet pipe is opposite to the outlet pipe, then the first inflation valve is controlled to be opened to inflate the spiral flow channel, then the air pressure of the inflation system is repeatedly increased and decreased to make the vibrating component vibrate and knock the inlet pipe, and finally the airflow in the spiral flow channel enters the inlet pipe through the oblique jet hole to promote the discharge of the mud;

[0028] Step two: when the flow value detected by the flow sensor is less than the preset value, a blockage alarm is given at this time;

[0029] Step three: the mud in the pipe is emptied, then the first inflation valve is controlled to be opened, then the air pressure of the inflation system is repeatedly increased and decreased to make the vibrating component vibrate and knock the inlet pipe, and finally the airflow in the spiral flow channel enters the inlet pipe through the oblique jet hole, the airflow blows dry the joint between the outlet pipe and the inlet pipe, the mud adhered to the joint between the outlet pipe and the inlet pipe is dried, and the dried mud falls from the joint between the outlet pipe and the inlet pipe under the vibration;

[0030] Step four: by controlling the pushing assembly, the ball launching mechanism is opposite to the outlet pipe, and the ball launching mechanism is controlled to clean the outlet pipe.

[0031] The technical effects and advantages of the application are as follows:

[0032] 1. The auxiliary cleaning assembly, the first inflation valve, the second inflation valve and the ball launching mechanism are matched with each other, when the mud is discharged, the first inflation valve is controlled to be opened, then the air pressure of the inflation system is controlled to be repeatedly increased and decreased, the hard section of the inlet pipeline is vibrated, and the mud is discharged.

[0033] 2. The auxiliary cleaning assembly, the first inflation valve, the second inflation valve and the ball launching mechanism are matched with each other, when the flow value detected by the flow sensor is less than the preset value, it is indicated that the outlet pipeline is blocked, at this time, the blocking alarm is performed, so that the staff can be reminded in time to clean.

[0034] 3. The auxiliary cleaning assembly, the first inflation valve, the second inflation valve and the ball launching mechanism are matched with each other, when the outlet pipeline needs to be cleaned, the mud in the pipeline is first emptied, then the first inflation valve is controlled to be opened, then the air pressure of the inflation system is controlled to be repeatedly increased and decreased, the airflow in the spiral flow passage finally enters the inlet pipeline through the inclined jet hole, the airflow blows dry the joint of the outlet pipeline and the inlet pipeline, the mud adhered to the joint of the outlet pipeline and the inlet pipeline is dried, and under the vibration, the dried mud falls from the joint of the outlet pipeline and the inlet pipeline, so that when the subsequent secondary sealing plate slides, the mud does not enter between the secondary sealing plate and the primary sealing plate, and the serious wear condition is avoided.

[0035] 4. The auxiliary cleaning assembly, the first inflation valve, the second inflation valve and the ball launching mechanism are matched with each other, when the hard section of the inlet pipeline needs to be cleaned, the stop valve is controlled to be closed, and the second inflation valve is controlled to be opened, so that the outlet pipeline bottom is inflated, and under the action of the air pressure, the cleaning ball at the outlet pipeline bottom moves reversely into the inlet pipeline, so that the hard section of the inlet pipeline is cleaned. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a front view of the overall structure of the present application.

[0037] Figure 2 It is a three-dimensional schematic view of the overall structure of the present application.

[0038] Figure 3 It is a sectional view of the present application.

[0039] Figure 4 It is a sectional view of the inlet pipeline, the outlet pipeline, the primary sealing plate and the secondary sealing plate structure of the present application.

[0040] Figure 5 It is a sectional view of the hard section of the inlet pipeline of the present application.

[0041] Figure 6 For the present invention Figure 5 A part of the structure of the present invention is enlarged and shown.

[0042] The figure is: 1, the inlet pipe; 101, the hard section; 102, the flexible section; 103, the contraction part; 2, the outlet pipe; 3, the ball launching mechanism; 301, the ball launching pipe; 302, the ball pipe cover; 303, the limiting assembly; 4, the main sealing plate; 5, the auxiliary sealing plate; 6, the sealing receiving groove; 7, the dynamic sealing assembly; 701, the inner sealing piece; 702, the outer sealing piece; 703, the elastic part; 8, the pushing assembly; 9, the auxiliary cleaning assembly; 901, the spiral flow channel; 902, the vibrating part; 9021, the air channel; 9022, the elastic piece; 9023, the sliding piece; 9024, the blocking ring; 903, the first ring flow channel; 904, the oblique jet hole; 905, the communication flow channel; 906, the stop valve; 907, the second ring flow channel; 10, the first inflation valve; 11, the second inflation valve; 12, the three-way control valve. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below 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. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0044] Embodiment one

[0045] As Figures 1-6 shown, the shield machine mud pipe cleaning valve, including control module, alarm module, inlet pipe 1, outlet pipe 2, ball launching mechanism 3, and the main sealing plate 4 connected with the shield machine and the auxiliary sealing plate 5 slidingly connected with the main sealing plate 4, the main sealing plate 4 is provided with a through hole corresponding to the outlet pipe 2, the auxiliary sealing plate 5 is provided with a through hole corresponding to the inlet pipe 1 and the ball launching mechanism 3, the bottom of the auxiliary sealing plate 5 through hole is provided with a dynamic sealing receiving groove 6, further including a dynamic sealing assembly 7, which is placed in the sealing receiving groove 6, used for sealing the butt joint of the through hole of the main sealing plate 4 and the auxiliary sealing plate 5; the top of the inlet pipe 1 is connected with the sewage valve, the sewage valve is prior art, not shown in the figure, the mud of the present application enters from the inlet pipe 1, and then is discharged through the outlet pipe 2, when it is needed to clean the outlet pipe 2, the pushing assembly 8 is controlled to make the pushing assembly 8 push the auxiliary sealing plate 5 to slide, the auxiliary sealing plate 5 slides to make the ball launching mechanism 3 correspond to the outlet pipe 2, so as to clean subsequently.

[0046] The pushing component 8 is used to push the secondary sealing plate 5 to slide on top of the main sealing plate 4. This invention controls the operation of the pushing component 8, which drives the secondary sealing plate 5 to slide. The sliding of the secondary sealing plate 5 causes the inlet pipe 1 and the ball-launching mechanism 3 to switch positions, thereby achieving slurry discharge or cleaning. Specifically, the pushing component 8 is a telescopic rod, one end of which is connected to the main sealing plate 4, and the other end is connected to the secondary sealing plate 5. The telescopic rod can be a hydraulic telescopic rod, a pneumatic telescopic rod, or an electric telescopic rod, etc.

[0047] The inlet pipe 1 includes a rigid section 101, which is connected to the secondary sealing plate 5. An auxiliary cleaning component 9 is provided inside the rigid section 101. The auxiliary cleaning component 9 can promote the flow of mud when discharging mud, clean the mud between the inlet pipe 1 and the main sealing plate 4, clean the rigid section 101, and enhance the sealing between the dynamic sealing component 7 and the main sealing plate 4 when the outlet pipe 2 is blocked.

[0048] The inlet pipe 1 also includes a flexible section 102, which is placed on top of the rigid section 101; by setting the flexible section 102, the present invention can realize the change of pipe position when the secondary sealing plate 5 slides.

[0049] The contraction section 103 is located on the inner top of the rigid section 101 to prevent the ball from the serving mechanism 3 from entering the flexible section 102.

[0050] The present invention facilitates the connection between the inlet pipe 1 and the secondary sealing plate 5 by setting a rigid section 101.

[0051] The auxiliary cleaning component 9 includes a spiral flow channel 901 formed in the side wall of the rigid section 101, and its bottom is connected to an adjustable air pressure inflation system via a first inflation valve 10 and a flow sensor.

[0052] A vibrating component 902 is placed within the rigid section 101. When airflow passes through the spiral channel 901, the vibrating component 902 vibrates. Specifically, the vibrating component 902 includes multiple air passages 9021 formed on the inner wall of the spiral channel 901 and communicating with the atmosphere. Each air passage 9021 is provided with an elastic element 9022. The end of the elastic element 9022 away from the spiral channel 901 has a sliding element 9023 that is slidably and sealingly connected to the air passage 9021. The end of the air passage 9021 away from the spiral channel 901 is threadedly connected to a blocking ring 9024. Specifically, the air passages 9021 are as follows... Figure 6The step shape is shown. The application controls the gas with different pressures filled into the spiral flow channel 901. When the high-pressure gas flows through the spiral flow channel 901 into the first annular flow channel 903, under the action of the gas flow, negative pressure is generated, which can drive the sliding part 9023 to slide to the spiral flow channel 901 after overcoming the elastic force of the elastic part 9022. When the high-pressure gas flows through the spiral flow channel 901 into the first annular flow channel 903 and the second annular flow channel 907, under the action of the elastic force of the elastic part 9022, the sliding part 9023 will push the blocking ring 9024 to impact and vibrate, and the blocking ring 9024 will transmit the vibration to the inlet pipe 1. After the gas flow enters the first annular flow channel 903, it enters the inside of the inlet pipe 1 through the oblique jet hole 904, thereby pushing the internal mud out and improving the discharge efficiency.

[0053] The first annular flow channel 903 is arranged at the bottom of the spiral flow channel 901.

[0054] The second annular flow channel 907 is arranged at the top of the spiral flow channel 901.

[0055] The plurality of arrayed oblique jet holes 904 are arranged on the side wall of the second annular flow channel 907, so that the second annular flow channel 907 is in communication with the inner cavity of the inlet pipe 1. The oblique jet hole 904 can promote the discharge of the mud.

[0056] The communication flow channel 905 is arranged at the bottom of the first annular flow channel 903 and is used for communication between the first annular flow channel 903 and the sealing receiving groove 6. The communication flow channel 905 is arranged to make the sealing receiving groove 6 in communication with the first annular flow channel 903. When the outlet pipe 2 is blocked by the mud, the internal gas pressure is increased, and the gas flow will push the dynamic sealing assembly 7 to move downward, thereby enhancing the sealing and preventing the mud from flowing out from the gap between the main sealing plate 4 and the auxiliary sealing plate 5.

[0057] The stop valve 906 is arranged at the end of the outlet pipe 2 away from the inlet pipe 1.

[0058] The second air charging valve 11 is connected with the air charging system through the butt joint pipe and is arranged at the end of the outlet pipe 2 away from the inlet pipe 1.

[0059] The stop valve 906 and the second air charging valve 11 are arranged. When it is needed to return the cleaning ball to the ball launching mechanism 3, the stop valve 906 is controlled to be closed, and the second air charging valve 11 is controlled to be opened at the same time, so that the outlet pipe 2 is reversely charged with air. Under the action of the gas pressure, the cleaning ball returns to the ball launching mechanism 3, thereby preparing for the next cleaning.

[0060] The ball launching mechanism 3 comprises a ball launching pipe 301, a ball pipe cover 302 and a cleaning ball arranged in the ball launching pipe 301.

[0061] The top peripheral wall of the ball launching pipe 301 is in communication with the air charging system and the atmosphere through the three-way control valve 12.

[0062] The ball launching pipe 301 further comprises a limiting assembly 303 arranged at the bottom of the ball launching pipe 301 for limiting the position of the cleaning ball. The limiting assembly 303 is an electric telescopic column, and the telescopic end of the electric telescopic column penetrates through the sidewall of the ball launching pipe 301.

[0063] The dynamic sealing assembly 7 comprises an inner sealing member 701 arranged in the sealing receiving groove 6 and an outer sealing member 702 arranged outside the inner sealing member 701 and located at the bottom of the communication flow channel 905, and the top of the outer sealing member 702 is provided with an elastic member 703. By arranging the dynamic sealing assembly 7, the inner sealing member 701 realizes the first sealing between the main sealing plate 4 and the auxiliary sealing plate 5, and the outer sealing member 702 is used to realize the second sealing between the main sealing plate 4 and the auxiliary sealing plate 5. When the outlet pipe 2 is blocked by mud, the internal air pressure increases, and the airflow will push the dynamic sealing assembly 7 to move downward, thereby enhancing the sealing and preventing the mud from flowing out from the gap between the main sealing plate 4 and the auxiliary sealing plate 5.

[0064] It should be noted that the elastic force of the elastic member 9022 is smaller than the elastic force of the elastic member 703, and the negative pressure will not cause the elastic member 703 to deform.

[0065] When it is necessary to discharge mud, the inlet pipe 1 is controlled to be opposite to the outlet pipe 2, then the first inflation valve 10 is controlled to be opened, and then the air pressure of the inflation system is controlled to be repeatedly increased and decreased. Due to the change of the air pressure, the airflow in the spiral flow channel 901 changes, under the action of the high-pressure airflow, a negative pressure is formed, the sliding member 9023 slides inward after overcoming the elastic force of the elastic member 9022, under the action of the low-pressure airflow, the sliding member 9023 is pushed to impact the blocking ring 9024 under the action of the elastic force of the elastic member 9022, thereby causing the hard section 101 of the inlet pipe 1 to vibrate. In the first aspect, the blockage is prevented, and in the second aspect, the airflow in the spiral flow channel 901 finally enters the inlet pipe 1 through the oblique jet hole 904, thereby promoting the discharge of mud.

[0066] When the outlet pipe 2 is blocked, due to the increase of the internal air pressure of the outlet pipe 2 and the inlet pipe 1, the flow rate filled into the spiral flow channel 901 decreases, thereby the air pressure in the spiral flow channel 901, the first annular flow channel 903 and the communication flow channel 905 increases, and the air pressure increase in the communication flow channel 905 pushes the outer sealing member 702 of the dynamic sealing assembly 7 to press tightly on the main sealing plate 4, thereby enhancing the sealing between the main sealing plate 4 and the auxiliary sealing plate 5.

[0067] Further, according to the flow detected by the flow sensor, when the flow value detected by the flow sensor is less than a preset value, it indicates that the outlet pipe 2 is blocked, at this time, a blocking alarm is given, so as to timely remind the staff to clean up, and the preset value is the flow value detected by the flow sensor when the inflation system inflates the low-pressure gas when the outlet pipe 2 is not blocked.

[0068] When the outlet pipe 2 needs to be cleaned, the mud in the pipe is first emptied, then the first inflation valve 10 is controlled to be opened, and then the air pressure of the inflation system is repeatedly increased and decreased, due to the change of the air pressure, the airflow in the spiral flow channel 901 changes, under the action of the high-pressure airflow, a negative pressure is formed, the sliding part 9023 slides inward after overcoming the elastic force of the elastic part 9022, under the action of the low-pressure airflow, the sliding part 9023 is pushed to impact the blocking ring 9024 under the elastic force of the elastic part 9022, so that the hard section 101 of the inlet pipe 1 vibrates, and the airflow in the spiral flow channel 901 finally enters the inlet pipe 1 through the oblique jet flow hole 904, the airflow blows dry the joint between the outlet pipe 2 and the inlet pipe 1, so that the mud adhered to the joint between the outlet pipe 2 and the inlet pipe 1 is dried, and at the same time, the dried mud falls from the joint between the outlet pipe 2 and the inlet pipe 1 under vibration, so that when the subsequent secondary sealing plate 5 slides, the mud does not enter between the secondary sealing plate 5 and the primary sealing plate 4, and a serious wear condition is prevented.

[0069] Then, the push assembly 8 is controlled to make the ball launching pipe 301 opposite to the outlet pipe 2, then the limiting assembly 303 is controlled to be released from limiting, then the three-way control valve 12 is controlled to be in conduction with the inflation system, and the ball launching pipe 301 is inflated, and under the action of the air pressure, the cleaning ball is pushed into the outlet pipe 2 and cleans the outlet pipe 2.

[0070] After the outlet pipe 2 is cleaned, when the hard section 101 of the inlet pipe 1 needs to be cleaned, the push assembly 8 is controlled to make the inlet pipe 1 opposite to the outlet pipe 2, since the cleaning ball is still in the outlet pipe 2 at this time, then the stop valve 906 is controlled to be closed, and the second inflation valve 11 is controlled to be opened, so that the outlet pipe 2 is inflated at the bottom, and under the action of the air pressure, the cleaning ball at the bottom of the outlet pipe 2 moves reversely into the inlet pipe 1, so that the hard section 101 of the inlet pipe 1 is cleaned, then the stop valve 906 is opened, the second inflation valve 11 is closed, the blowdown valve is closed, the first inflation valve 10 is opened, the first inflation valve 10 is opened, and the airflow pushes the cleaning ball to flush into the outlet pipe 2, so as to prepare for the recovery of the subsequent cleaning ball.

[0071] Embodiment two

[0072] The application also provides a use method of the shield machine mud pipe cleaning valve, comprising the following steps:

[0073] Step one, by controlling the push assembly 8, make the inlet pipe 1 and the outlet pipe 2 relative, then control the first inflation valve 10 to open to the spiral flow channel 901, then control the inflation system to repeatedly increase and decrease the pressure, make the vibration component 902 vibrate and knock the inlet pipe 1, the airflow in the spiral flow channel 901 finally enters the inlet pipe 1 through the oblique jet hole 904 to promote the discharge of the mud;

[0074] Step two, when the flow value detected by the flow sensor is less than the preset value, at this time, carry out the blockage alarm;

[0075] Step three, empty the mud in the pipe, then control the first inflation valve 10 to open, then control the inflation system to repeatedly increase and decrease the pressure, make the vibration component 902 vibrate and knock the inlet pipe 1, the airflow in the spiral flow channel 901 finally enters the inlet pipe 1 through the oblique jet hole 904, the airflow blows dry the joint of the outlet pipe 2 and the inlet pipe 1, the mud adhered to the joint of the outlet pipe 2 and the inlet pipe 1 is dried, under the vibration, the dried mud falls from the joint of the outlet pipe 2 and the inlet pipe 1;

[0076] Step four, by controlling the push assembly 8, make the ball launching mechanism 3 relative to the outlet pipe 2, control the ball launching mechanism 3 to clean the outlet pipe 2.

[0077] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art, according to the technical solution and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, should be covered in the protection scope of the present application.

Claims

1. A mud pipeline cleaning valve for a tunnel boring machine, comprising an inlet pipe, an outlet pipe, a ball launching mechanism, a main sealing plate, and a secondary sealing plate slidably connected to the main sealing plate, wherein the secondary sealing plate has a dynamic sealing receiving groove at its bottom, characterized in that... It also includes a dynamic sealing assembly, which is placed in a sealing storage groove and is used to seal the joint between the main sealing plate and the secondary sealing plate; A pusher assembly is used to push the secondary sealing plate to slide on top of the main sealing plate; The inlet pipe includes a rigid section connected to the secondary sealing plate, which contains an auxiliary cleaning component. The auxiliary cleaning component can promote mud flow during mud discharge, clean the mud between the inlet pipe and the main sealing plate, clean the rigid section, and enhance the sealing performance between the dynamic sealing component and the main sealing plate when the outlet pipe is blocked. The auxiliary cleaning component includes a spiral flow channel opened in the side wall of the hard section, and its bottom is connected to an adjustable air pressure inflation system through a first inflation valve and a flow sensor. The vibrating component is placed inside a rigid section, and it can vibrate when the airflow passes through the spiral channel. The first annular channel is located at the bottom of the spiral channel; The second annular channel is located at the top of the spiral channel; Multiple arrayed oblique jet holes are opened on the side wall of the second annular channel, so that the second annular channel is connected to the inner cavity of the inlet pipe; A connecting channel is provided at the bottom of the first annular channel to connect the first annular channel with the sealing and receiving groove. A gate valve is located at the end of the outlet pipe furthest from the inlet pipe. The second inflation valve is connected to the inflation system via a connecting pipe and is located at the end of the outlet pipe away from the inlet pipe. The vibrating component includes multiple air passages formed on the inner wall of the spiral flow channel and connected to the atmosphere. Each air passage is provided with an elastic element. The end of the elastic element away from the spiral flow channel is provided with a sliding element that is slidably connected to the air passage in a sealed manner. The end of the air passage away from the spiral flow channel is threadedly connected with a blocking ring.

2. The shield machine mud pipeline cleaning valve according to claim 1, characterized in that, The inlet pipe also includes a flexible section, which is placed on top of the rigid section; The constriction section, located on the inner wall of the top of the rigid section, is used to prevent the ball from being cleared by the serving mechanism from entering the flexible section.

3. The shield machine mud pipeline cleaning valve according to claim 2, characterized in that, The serving mechanism includes a serving tube, a tube cover, and a cleaning ball placed inside the serving tube; The top periphery of the ball-serving tube is connected to the inflation system and the atmosphere via a three-way control valve.

4. The shield machine mud pipeline cleaning valve according to claim 3, characterized in that, The pushing component is a telescopic rod, one end of which is connected to the main sealing plate and the other end of which is connected to the secondary sealing plate.

5. The shield machine mud pipeline cleaning valve according to claim 4, characterized in that, The serving conduit also includes a limiting component located at the bottom of the serving conduit to limit the position of the ball being cleared.

6. The shield machine mud pipeline cleaning valve according to claim 5, characterized in that, The dynamic sealing assembly includes an inner sealing element placed inside the sealing receiving groove and an outer sealing element that is fitted outside the inner sealing element and located at the bottom of the communicating flow channel. The top of the outer sealing element is provided with an elastic component.

7. A method for using a cleaning valve for a tunnel boring machine's slurry pipeline, comprising using the cleaning valve as described in claim 6 for cleaning the slurry pipeline of a tunnel boring machine, characterized in that... Includes the following steps: Step 1: By controlling the push component, the inlet pipe is aligned with the outlet pipe. Then, the first air valve is opened to inflate the spiral channel. The air pressure of the air system is repeatedly increased and decreased to make the vibrating component vibrate and strike the inlet pipe. The airflow in the spiral channel eventually enters the inlet pipe through the oblique jet orifice to promote the discharge of mud. Step 2: When the flow rate detected by the flow sensor is less than the preset value, a blockage alarm will be triggered. Step 3: Empty the mud from the pipe, then open the first air valve, and then repeatedly increase and decrease the air pressure of the air system to make the vibrating component vibrate and knock on the inlet pipe. The airflow in the spiral channel finally enters the inlet pipe through the oblique jet hole. The airflow dries the joint between the outlet pipe and the inlet pipe, so that the mud adhering to the joint between the outlet pipe and the inlet pipe dries. Under vibration, the dried mud falls off from the joint between the outlet pipe and the inlet pipe. Step 4: By controlling the push component, the ball-serving mechanism is positioned opposite the outlet pipe, and the ball-serving mechanism is controlled to clean the outlet pipe.

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