A slurry improvement injection device for shield engineering

Abstract

The application belongs to the field of tunnel construction, in particular to a muck improvement injection equipment for shield engineering, which comprises an injection pipe, a shield tail fixed to the outside of the injection pipe, and a middle shield fixed to the outside of the shield tail. The end port of the injection pipe is blocked by a shielding plate, which reduces the splashing of muck into the inside of the injection pipe and causes blockage. Two groups of metal elastic plates are fixed to the outer wall of the shielding plate, which generates vibration by cooperating with the falling muck to shock the outer wall of the metal elastic plates, thereby reducing the adhesion of viscous muck to the outer wall of the metal elastic plates. The four groups of metal plates are washed by bentonite, and the four groups of metal plates are opened by rotating the four groups of first shafts. When the bentonite stops being conveyed, the multiple groups of torsional springs drive the four groups of first shafts to rotate, and the four groups of metal plates are closed to reduce the splashing of muck into the inside of the injection pipe and cause blockage. The multiple groups of heating wires generate heat energy, which is absorbed by the metal plates to heat, so that the residual bentonite shrinks, thereby reducing the blockage of the end port of the injection pipe.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of tunnel construction, in particular to a spoil improvement injection equipment for shield engineering. BACKGROUND

[0002] Tunnel shield engineering is a major project for promoting urban underground rail construction, which uses tunnel boring machine to open underground passage by using shield method, and improves the flow plasticity of spoil and the stability of excavation surface by injecting equipment for improving the spoil cut by cutting while tunneling.

[0003] The spoil improvement injection equipment for shield engineering is usually arranged at the shield tail of the shield machine, and the bentonite or foam is injected into the inside of the shield through the injection equipment, and is mixed and improved with the spoil cut into the shield by the cutter head, and finally is conveyed to the ground by the conveyor to complete the improvement and transportation of the spoil.

[0004] When the shield machine is tunneling, the spoil improvement injection equipment will inject bentonite into the shield, and due to the long pipeline, the bentonite will be transported to the shield for a long time, and in the process of transportation, the cutter head has already opened and cut the spoil, and part of the viscous spoil will fall into the injection port and adhere, which is easy to cause the injection port to be blocked, and as the bentonite is mixed with the spoil during transportation, serious blockage is formed at the injection port, which causes the spoil improvement system to be unable to work normally.

[0005] Therefore, the present application provides a spoil improvement injection equipment for shield engineering. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical scheme adopted by the present application to solve its technical problems is: the slag soil improvement injection equipment of a shield engineering, comprising an injection pipe; the outer part of the injection pipe is fixedly connected with a shield tail; the outer part of the shield tail is fixedly connected with a middle shield; the outer part of the shield tail is fixedly connected with a shielding plate; the shielding plate is conical in shape, and a discharging port is formed below the shielding plate; the inner part of the shield tail is fixedly connected with a cutter head support; the inner part of the shield tail is fixedly connected with a cutter head drive, and the cutter head drive penetrates the middle part of the cutter head support; the output end of the cutter head drive is fixedly connected with a cutter head front shield; the outer part of the shielding plate is provided with a shielding assembly, which is used for shielding the slag soil; the shield tail is used as the rear bin of the entire shield machine, which is used for setting up a conveying machine to transport the cut slag soil; the cutter head front shield is divided into two structures of a front shield and a cutter head; the cutter head support is connected with the front shield; the output end of the cutter head drive is connected with the cutter head; with the rotation of the output end of the cutter head drive, the cutter head cuts the slag soil; the cut slag soil is temporarily stored in the inner part of the middle shield; the bentonite is transported in the injection pipe by pumping; it falls into the inner part of the middle shield from the discharging port of the shielding plate to mix with the slag soil, thereby playing a role in improving the slag soil; and the shielding plate is fixed at the port of the injection pipe to shield; the slag soil cut and splashed into the inner part of the middle shield is blocked outside the port of the injection pipe by the shielding assembly, thereby reducing the situation that the slag soil enters the inner part of the injection pipe; and the conical inclined surface of the shielding plate is used for guiding the slag soil adhered to the wall of the shielding plate to slide down, thereby reducing the adhesion of the sticky slag soil.

[0008] Preferably, the shielding assembly comprises metal elastic plates and rubber blocks; the metal elastic plates are fixedly connected to the outer part of the shielding plate and are symmetrically provided with two groups; the rubber blocks are fixedly connected to the outer part of the shielding plate and are fixedly connected to the outer part of the metal elastic plates; the rubber blocks are mountain-shaped in shape and are provided with two groups; the two groups of metal elastic plates are used for shielding the slag soil again; the slag soil will adhere to the outer part of the metal elastic plates; with the cut slag soil continuously hitting the outer wall of the metal elastic plates, the metal elastic plates will vibrate, thereby causing the sticky slag soil adhered to the metal elastic plates to fall off, thereby reducing the adhesion of the sticky slag soil; when the slag soil contains impurities such as stones, the slag soil continuously hits the shielding plate to cause abrasion, thereby affecting the service life of the shielding plate; therefore, the metal elastic plates are used to simultaneously play a protection effect on the shielding plate; the two groups of rubber blocks are respectively fixed between the shielding plate and the metal elastic plates, thereby playing a supporting role on the metal elastic plates; and the mountain-shaped rubber blocks are used for first bearing the force in the middle part, and then bearing the force on the two sides with the increase of the shock force, thereby enhancing the supporting effect on the metal elastic plates.

[0009] Preferably, the outer part of the two groups of metal elastic plates is fixedly connected with connecting elastic sheets, and is located at the top end position of the shielding plate; the outer part of the metal elastic plate is provided with a plurality of groups of flow guide grooves; the two groups of metal elastic plates are connected by the connecting elastic sheets, when the slag falls and hits the outer wall of one group of metal elastic plates, the connecting elastic sheets will drive the other group of metal elastic plates to vibrate at the same time, thereby enhancing the slag removal and reducing the adhesion effect, reducing the accumulation and blockage of the shielding plate, and using the plurality of groups of flow guide grooves provided on the metal elastic plate, the slag slides along the flow guide groove, reducing the adhesion of the slag.

[0010] Preferably, the outer part of the shield tail is rotatably connected with a first rotating shaft through a torsional spring, and four groups of the first rotating shafts are arranged; the four groups of first rotating shafts are located at the position of the injection pipe; the outer part of the first rotating shaft is fixedly connected with a metal baffle; a plurality of groups of first rotating shafts are rotatably connected on the inner wall of the shield tail through torsional springs, and a metal baffle is arranged on each of the plurality of groups of first rotating shafts, when the bentonite is sprayed from the injection pipe, the four groups of metal baffles are pushed open, and the four groups of metal baffles are unfolded to the surrounding like a flower with the rotation of the first rotating shaft, when the bentonite stops pumping, the torsional spring drives the first rotating shaft to quickly reset, and the four groups of metal baffles are folded together, reducing the splashing of the slag into the interior of the injection pipe to cause blockage, and the four groups of metal baffles can also prevent some other impurities in the slag from entering.

[0011] Preferably, the outer part of the metal baffle is fixedly connected with a fixing block; the inner part of the fixing block is provided with a heating wire; a plurality of groups of fixing blocks are fixed on the outer wall of the metal baffle, when working again, the heating wire arranged in the inner part of the fixing block generates heat, the metal baffle absorbs the heat to heat the bentonite at the port of the injection pipe, so that the bentonite is heated to 100-200 DEG C to remove the interlayer water, the volume shrinks, and the adhesion and blockage of the bentonite at the port of the injection pipe are reduced.

[0012] Preferably, the inner part of the injection pipe is fixedly connected with a plurality of groups of fixing frames; the outer part of the fixing frame is fixedly connected with a conical block, and the conical block is conical; the inner part of the conical block is rotatably connected with a second rotating shaft; the outer part of the second rotating shaft is fixedly connected with a plurality of groups of stirring blades; three groups of fixing frames are used to fix the conical block at the port of the injection pipe, the pumped bentonite washes the plurality of groups of stirring blades, the plurality of groups of stirring blades drive the second rotating shaft to rotate in the conical block, the plurality of groups of stirring blades stir and disperse the bentonite, improve the uniformity of the bentonite and the slag mixing effect, and further enhance the improvement of the slag.

[0013] Preferably, the second rotating shaft is internally fixedly connected with a rotating rod; the rotating rod is externally fixedly connected with three groups of connecting rods; the connecting rods are externally fixedly connected with scrapers, and the scrapers are attached to the inner wall of the injection pipe; the second rotating shaft drives the rotating rod to rotate when rotating, the three groups of connecting rods outside the rotating rod drive the scrapers to rotate respectively, and the three groups of scrapers are attached to the injection pipe port position and scraped, so as to scrape the residual bentonite in the injection pipe port, thereby reducing the effect of bentonite accumulation and blockage in the injection pipe port, and the scrapers are scraped to cooperate with the multiple stirring blades to play a role in stirring the bentonite.

[0014] Preferably, the scraper is internally provided with a storage cavity; and multiple oscillating balls are arranged in the storage cavity; the storage cavity is arranged in the scraper, and the multiple oscillating balls are arranged in the storage cavity; the multiple oscillating balls oscillate in the storage cavity when the scraper continuously rotates and scrapes the injection pipe port, thereby reducing the effect of bentonite adhesion and reducing the blockage of the injection pipe port.

[0015] Preferably, the injection pipe is internally fixedly connected with an overflow pipe, and the overflow pipe penetrates through the injection pipe; the overflow pipe is in communication with the injection pipe; and the overflow pipe is internally fixedly connected with a filter screen; the overflow pipe is fixedly connected to the top end of the injection pipe, and the overflow pipe is in communication with the inside of the middle shield from above the injection pipe; when the injection pipe port is blocked, the bentonite is continuously conveyed to the inside of the middle shield from the overflow pipe, thereby reducing the situation that the bentonite blocks the inside of the injection pipe, and the filter screen is used to shunt the bentonite, the bentonite is dispersed through the holes of the filter screen, and the effect of improving the soil is enhanced.

[0016] Preferably, the overflow pipe is internally fixedly connected with multiple elastic pull ropes; the elastic pull ropes are externally fixedly connected with ball plugs, and the ball plugs are located at the port of the overflow pipe; and the ball plugs are internally provided with arc-shaped holes; the multiple elastic pull ropes are used to pull the ball plugs to block the port of the overflow pipe, thereby reducing the splashing of the soil into the inside of the overflow pipe, and the arc-shaped holes in the ball plugs are used to discharge the bentonite from the arc-shaped holes first when the injection pipe port is blocked, and if the injection pipe port is seriously blocked, a large amount of bentonite will press the elastic pull ropes to stretch and bear stress, the ball plug will be forced open, a large amount of bentonite will be discharged into the inside of the middle shield, the effect of self-adaptive discharge is achieved, and the situation of blockage in the inside of the injection pipe is reduced.

[0017] The beneficial effects of the application are as follows:

[0018] 1. The muck improvement injection equipment of shield engineering, the shielding plate is fixed at the port of the injection pipe by being arranged, the splashing of the muck into the inside of the injection pipe is reduced, and the outer wall of the shielding plate is fixed by two groups of metal elastic plates, the vibration is generated by cooperating with the falling shock of the muck on the outer wall of the metal elastic plate, the adhesion of the viscous muck on the outer wall of the metal elastic plate is reduced, the four groups of metal shielding plates are opened by being washed by the bentonite, the four groups of metal shielding plates are closed by the four groups of first shafts rotating, the splashing of the muck into the inside of the injection pipe is reduced, the heat energy is generated by the plurality of heating wires, the residual bentonite is contracted by the metal shielding plate absorbing the heat energy, and the clogging of the port of the injection pipe is reduced.

[0019] 2. The muck improvement injection equipment of shield engineering, the stirring effect of the bentonite is achieved by the stirring blade rotating with the bentonite conveying, the improvement effect of the muck is enhanced, the residual bentonite at the port of the injection pipe is scraped by the scraper on the connecting rod, the clogging of the port of the injection pipe is reduced, the residual bentonite is released by the overflow pipe fixed at the top end of the injection pipe, and the clogging of the port of the injection pipe is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0020] The application will be further described below with reference to the drawings.

[0021] Figure 1 is a perspective view of the application;

[0022] Figure 2 is a partial sectional view of the shield in the application;

[0023] Figure 3 is a structural schematic view of the shielding plate in the application;

[0024] Figure 4 is a combined schematic view of the metal shielding plate in the application;

[0025] Figure 5 is a partial schematic view of the injection pipe in the application;

[0026] Figure 6 is a structural sectional view of the application;

[0027] Figure 7 is a structural schematic view of the scraper in the application;

[0028] Figure 8 is a partial sectional view of the overflow pipe in the application.

[0029] In the figure: 1, injection pipe; 11, shield tail; 12, middle shield; 13, shield plate; 14, cutter holder; 15, cutter drive; 16, cutter front shield; 2, metal elastic plate; 21, rubber block; 3, connecting elastic sheet; 31, flow guide groove; 4, first rotating shaft; 41, metal baffle; 5, fixed block; 51, heating wire; 6, fixed frame; 61, conical block; 62, second rotating shaft; 63, stirring blade; 7, rotating rod; 71, connecting rod; 72, scraper; 8, oscillating ball; 9, overflow pipe; 91, filter screen; 92, elastic pull rope; 93, ball plug. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0031] Example One

[0032] As Figures 1 to 6As shown in the embodiment of the present invention, a slag improvement and injection device for shield tunneling includes an injection pipe 1; a shield tail 11 is fixedly connected to the outside of the injection pipe 1; a middle shield 12 is fixedly connected to the outside of the shield tail 11; a baffle plate 13 is fixedly connected to the outside of the shield tail 11; the baffle plate 13 is conical in shape, and a material discharge port is opened at the bottom of the baffle plate 13; a cutterhead frame 14 is fixedly connected to the inside of the shield tail 11; a cutterhead drive 15 is fixedly connected to the inside of the shield tail 11, and the cutterhead drive 15 penetrates the middle shield of the cutterhead frame 14. The output end of the cutterhead drive 15 is fixedly connected to the cutterhead front shield 16; a shielding component is provided on the outside of the shield plate 13 to shield the excavated soil; during tunnel boring machine excavation, the excavated soil improvement injection device injects bentonite into the middle shield 12. Due to the long pipeline, it takes a long time for the bentonite to be transported to the middle shield 12. During the transportation process, the cutterhead has already started cutting the excavated soil, and some sticky excavated soil will fall into the injection port and adhere, which can easily cause blockage of the injection port. Furthermore, as the bentonite is transported, it mixes with the excavated soil. Accumulation at the injection port causes severe blockage, preventing the slag improvement system from functioning properly. Therefore, in this embodiment of the invention, the tail shield 11 serves as the rear compartment of the entire tunnel boring machine, used to house a conveyor to transport the cut slag. The cutterhead front shield 16 consists of two structures: the front shield and the cutterhead. The cutterhead frame 14 is connected to the front shield, and the output end of the cutterhead drive 15 is connected to the cutterhead. As the output end of the cutterhead drive 15 rotates, the cutterhead cuts the slag. The cut slag is temporarily stored inside the middle shield 12 and pumped out. Bentonite is transported inside the injection pipe 1 and falls from the discharge port of the baffle plate 13 into the interior of the middle shield 12 to mix with the slag, thereby improving the slag. The baffle plate 13 is fixed at the port of the injection pipe 1 to block the slag that splashes into the middle shield 12 from entering the injection pipe 1, reducing the amount of slag entering the injection pipe 1. At the same time, the conical slope of the baffle plate 13 guides the slag adhering to the wall of the baffle plate 13 to slide off, reducing the adhesion of sticky slag.

[0033] like Figures 1 to 3As shown, the shielding assembly comprises metal elastic plates 2 and rubber blocks 21; the metal elastic plates 2 are fixed to the outer part of the shielding plate 13 and are symmetrically provided with two groups; the rubber blocks 21 are fixed to the outer wall of the shielding plate 13 and are fixed to the inner wall of the metal elastic plates 2; the rubber blocks 21 are in the shape of a mountain and are provided with two groups; when the cuttings are shielded by the shielding plate 13, the cuttings with viscosity are easily attached to the outer wall of the shielding plate 13 and are difficult to fall off, so the two groups of metal elastic plates 2 are used to shield the cuttings again, the cuttings are attached to the outer part of the metal elastic plates 2, and the cuttings are continuously hit against the outer wall of the metal elastic plates 2, so that the metal elastic plates 2 vibrate, the cuttings with viscosity attached to the metal elastic plates 2 are shaken off, the attachment of the cuttings with viscosity is reduced, when the cuttings contain impurities such as stones, the cuttings continuously hit against the shielding plate 13 and cause abrasion, which affects the service life of the shielding plate 13, so the metal elastic plates 2 are used to protect the shielding plate 13, and the two groups of rubber blocks 21 are respectively fixed between the shielding plate 13 and the metal elastic plates 2, which supports the metal elastic plates 2, and the rubber blocks 21 are in the shape of a mountain, when a large amount of cuttings hit against the metal elastic plates 2, the middle part of the rubber blocks 21 is first stressed, then the two sides of the rubber blocks 21 are stressed as the hitting force increases, which enhances the support effect of the metal elastic plates 2.

[0034] The outer part of the two groups of metal elastic plates 2 is fixed with connecting elastic sheets 3 and is located at the top end of the shielding plate 13; the outer part of the metal elastic plates 2 is provided with a plurality of flow guide grooves 31; when a large amount of cuttings are attached to the outer wall of the metal elastic plates 2, the two groups of metal elastic plates 2 are connected by the connecting elastic sheets 3, when the cuttings fall and hit against the outer wall of one group of metal elastic plates 2, the connecting elastic sheets 3 will simultaneously vibrate the other group of metal elastic plates 2, which enhances the effect of removing the cuttings and reducing the attachment, reduces the accumulation and blockage of the shielding plate 13, and the cuttings slide along the flow guide grooves 31, which reduces the attachment of the cuttings.

[0035] As shown, Figures 1 to 6As shown, the outer part of the shield tail 11 is rotatably connected with a first rotating shaft 4 through a torsion spring, and the first rotating shaft 4 is provided with four groups; the four groups of the first rotating shaft 4 are located at the position of the injection pipe 1; the outer part of the first rotating shaft 4 is fixedly connected with a metal baffle 41; when a large amount of slag soil splashes in the inner part of the middle shield 12, the slag soil is easy to flow into the inner part of the injection pipe 1 from the bottom end of the shielding plate 13, so a plurality of groups of the first rotating shaft 4 are rotatably connected on the inner wall of the shield tail 11 through the torsion spring respectively, and a plurality of groups of the metal baffle 41 are installed on the first rotating shaft 4 respectively, when the bentonite is sprayed out from the injection pipe 1, the four groups of the metal baffles 41 are pushed away, and the four groups of the metal baffles 41 are unfolded to the surrounding like blooming with the rotation of the first rotating shaft 4, when the bentonite stops pumping, the torsion spring drives the first rotating shaft 4 to reset quickly, and the four groups of the metal baffles 41 are folded to each other, so as to reduce the splashing of the slag soil into the inner part of the injection pipe 1 to cause blockage, and the four groups of the metal baffles 41 can also prevent part of other sundries in the slag soil from entering.

[0036] The outer part of the metal baffle 41 is fixedly connected with a fixed block 5; the inner part of the fixed block 5 is installed with a heating wire 51; when the bentonite stops conveying, part of the bentonite will remain at the port of the injection pipe 1, and since the bentonite is easy to cause adhesion blockage due to long-time accumulation at the port, a plurality of groups of the fixed block 5 are fixed on the outer wall of the metal baffle 41, when working again, the inner part of the fixed block 5 is installed with the heating wire 51 to generate heat energy, the metal baffle 41 absorbs the heat energy to heat the bentonite at the port of the injection pipe 1, so that the bentonite is heated to 100-200℃ to remove interlayer water, the volume shrinks, and the adhesion blockage at the port of the injection pipe 1 is reduced.

[0037] As shown in the figure, Figures 1 to 7 The inner part of the injection pipe 1 is fixedly connected with a plurality of groups of fixed frames 6; the outer part of the fixed frame 6 is fixedly connected with a conical block 61, and the conical block 61 is conical; the inner part of the conical block 61 is rotatably connected with a second rotating shaft 62; the outer part of the second rotating shaft 62 is fixedly connected with a plurality of groups of stirring blades 63; when the bentonite is conveyed in the inner part of the injection pipe 1, three groups of the fixed frames 6 are used to fix the conical block 61 at the port of the injection pipe 1, the pumped bentonite washes the plurality of groups of the stirring blades 63, the plurality of groups of the stirring blades 63 drive the second rotating shaft 62 to rotate in the inner part of the conical block 61, the plurality of groups of the stirring blades 63 agitate and disperse the bentonite, improve the uniformity of the bentonite and the slag soil mixing effect, and further enhance the improvement of the slag soil.

[0038] The second rotating shaft 62 is internally fixedly connected with a rotating rod 7; the rotating rod 7 is externally fixedly connected with three groups of connecting rods 71; the connecting rods 71 are externally fixedly connected with scrapers 72, and the scrapers 72 are attached to the inner wall of the injection pipe 1; when the bentonite flushes a plurality of stirring blades 63 and rotates with the second rotating shaft 62, the bentonite is prone to adhere to the port of the injection pipe 1 when the conveying is stopped, so the second rotating shaft 62 drives the rotating rod 7 to rotate, the three groups of connecting rods 71 outside the rotating rod 7 drive the scrapers 72 to rotate, respectively, the three groups of scrapers 72 are attached to the port of the injection pipe 1 and are scraped, the bentonite remaining in the port of the injection pipe 1 is scraped, thereby reducing the effect of the bentonite remaining in the port of the injection pipe 1 and accumulating and blocking, and the scrapers 72 are scraped, cooperating with the plurality of stirring blades 63 to play a role in stirring the bentonite.

[0039] The scraper 72 is internally provided with a storage cavity; a plurality of oscillating balls 8 are arranged in the storage cavity; when the bentonite adheres to the scraper 72, the weight of the scraper 72 is increased when rotating, thereby causing the scraping effect of the scraper 72 to be poor, so the storage cavity is internally arranged in the scraper 72, and a plurality of oscillating balls 8 are arranged in the storage cavity, the plurality of oscillating balls 8 oscillate in the storage cavity when the scraper 72 continuously rotates and scrapes the port of the injection pipe 1, thereby reducing the effect of the bentonite adhering and reducing the blocking of the port of the injection pipe 1.

[0040] As shown in Figures 1 to 6 The injection pipe 1 is internally fixedly connected with an overflow pipe 9, and the overflow pipe 9 penetrates the injection pipe 1; the overflow pipe 9 is in communication with the injection pipe 1; the overflow pipe 9 is internally fixedly connected with a filter screen 91; a plurality of structures are fixedly arranged at the port of the injection pipe 1, thereby causing the port of the injection pipe 1 to be possibly blocked, so the overflow pipe 9 is fixedly connected to the top end of the injection pipe 1, the overflow pipe 9 is in communication with the inside of the middle shield 12 from above the injection pipe 1, when the port of the injection pipe 1 is blocked, the bentonite will continue to be conveyed to the inside of the middle shield 12 through the overflow pipe 9, thereby reducing the situation that the bentonite blocks the inside of the injection pipe 1, and the filter screen 91 is used to shunt the bentonite, the bentonite is scattered through the holes of the filter screen 91, thereby enhancing the effect of the soil improvement.

[0041] Example two

[0042] As shown in Figure 8As shown, the comparative example one, wherein another embodiment of the present application is: the inside of the overflow pipe 9 is fixed with multiple groups of elastic pull rope 92; the outside of the elastic pull rope 92 is fixed with the ball plug 93, and is located at the port of the overflow pipe 9; the inside of the ball plug 93 is provided with an arc hole; when the slag is cut into the inside of the middle shield 12, part of the slag is easy to enter the inside of the overflow pipe 9, so the multiple groups of elastic pull rope 92 pull the ball plug 93 to block the port of the overflow pipe 9, thereby reducing the splashing of the slag into the inside of the overflow pipe 9, and at the same time, the ball plug 93 is provided with an arc hole in the inside, when the port of the injection pipe 1 is blocked, the bentonite will be discharged from the arc hole first, if the port of the injection pipe 1 is blocked seriously, a large amount of bentonite will press the elastic pull rope 92 to stretch the stress, and the ball plug 93 will be broken, and a large amount of bentonite will be discharged into the inside of the middle shield 12, thereby achieving the effect of self-adaptive discharge, and reducing the blocking of the inside of the injection pipe 1.

[0043] The working process is as follows: when the bentonite is injected, the bentonite is first pumped along the injection pipe 1 to the inside of the middle shield 12, the shielding plate 13 shields the slag cut by the cutter head of the cutter head front shield 16, reduces the splashing of the slag into the inside of the injection pipe 1 to cause the blocking, and the two groups of metal elastic plates 2 are fixed on the outer wall of the shielding plate 13, cooperate with the falling slag to shake the outer wall of the metal elastic plate 2 to generate vibration, reduce the adhesion of the viscous slag on the outer wall of the metal elastic plate 2, the connecting elastic sheet 3 is fixed between the two groups of metal elastic plates 2 to generate a linkage reaction, enhances the frequency of vibration and the effect of anti-adhesion, the rubber block 21 is supported between the shielding plate 13 and the metal elastic plate 2 to enhance the rebound force of the metal elastic plate 2, the bentonite is used to flush the four groups of metal shielding plates 41, the four groups of metal shielding plates 41 are opened by rotating the four groups of first shafts 4, when the bentonite stops being conveyed, the multiple groups of torsional springs drive the four groups of first shafts 4 to rotate, the four groups of metal shielding plates 41 are closed, thereby achieving the effect of shielding the slag, the heating wire 51 is fixed in the inside of the fixed block 5 to generate heat energy, and is conducted to the metal shielding plate 41, thereby achieving the effect of heating and shrinking the bentonite at the port of the injection pipe 1, reducing the adhesion and blocking of the bentonite, when the bentonite continues to be conveyed, the bentonite flushes the multiple groups of stirring leaves 63 to drive the second shaft 62 to rotate, the three groups of fixed frames 6 support the conical block 61, and when the second shaft 62 rotates, the rotating rod 7 rotates to drive the scraper 72 on the connecting rod 71 to scrape the port of the injection pipe 1, thereby reducing the residual bentonite at the port of the injection pipe 1, reducing the blocking of the port of the injection pipe 1, cooperating with the multiple groups of shock balls 8 to shake in the storage cavity, thereby reducing the adhesion of the bentonite on the outer wall of the scraper 72, finally, the overflow pipe 9 is fixed at the top end of the injection pipe 1, when the port of the injection pipe 1 is blocked, the bentonite is discharged through the overflow pipe 9, thereby achieving the effect of preventing the blocking of the port of the injection pipe 1, the multiple groups of elastic pull ropes 92 pull the ball plug 93 fixed at the port of the overflow pipe 9, thereby reducing the splashing of the cut slag into the inside of the overflow pipe 9 to cause the blocking.

[0044] The above-mentioned front, back, left, right, up and down are all based on the drawings in the specification Figure 1For the sake of reference, according to the standard of the perspective of the person, the side of the device facing the observer is defined as front, the left side of the observer is defined as left, and the like.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0046] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A soil improvement and injection device for shield tunneling projects, characterized in that: The system includes an injection pipe (1); a shield tail (11) is fixedly connected to the outside of the injection pipe (1); a middle shield (12) is fixedly connected to the outside of the shield tail (11); a baffle plate (13) is fixedly connected to the outside of the shield tail (11); the baffle plate (13) is conical in shape and has a discharge port at its bottom; a cutter head frame (14) is fixedly connected inside the shield tail (11); a cutter head drive (15) is fixedly connected inside the shield tail (11) and the cutter head drive (15) passes through the middle of the cutter head frame (14); a cutter head front shield (16) is fixedly connected to the output end of the cutter head drive (15); and a shielding component is provided on the outside of the baffle plate (13) for shielding the slag. The shielding assembly includes a metal spring plate (2) and a rubber block (21); the metal spring plate (2) is fixed to the outside of the shielding plate (13) and two sets are symmetrically arranged; the rubber block (21) is fixed to the outer wall of the shielding plate (13) and fixed to the inner wall of the metal spring plate (2); the rubber block (21) is shaped like a mountain and two sets are arranged. The two sets of metal spring plates (2) are fixed to the outside of the connecting spring pieces (3) and are located at the top of the baffle plate (13); multiple sets of guide grooves (31) are opened on the outside of the metal spring plates (2).

2. The slag improvement and injection device for shield tunneling projects according to claim 1, characterized in that: The shield tail (11) is rotatably connected to a first rotating shaft (4) by a torsion spring, and there are four sets of the first rotating shaft (4); the four sets of the first rotating shaft (4) are located at the injection pipe (1); a metal baffle (41) is fixed to the outside of the first rotating shaft (4).

3. The slag improvement and injection device for shield tunneling projects according to claim 2, characterized in that: A fixing block (5) is fixed to the outside of the metal baffle (41); a heating wire (51) is installed inside the fixing block (5).

4. The slag improvement and injection device for shield tunneling projects according to claim 1, characterized in that: The injection pipe (1) is internally fixed with multiple sets of fixing brackets (6); the fixing brackets (6) are externally fixed with a conical block (61), and the conical block (61) is conical; the conical block (61) is internally rotatably connected with a second rotating shaft (62); the second rotating shaft (62) is externally fixed with multiple sets of stirring blades (63).

5. A slag improvement and injection device for shield tunneling projects according to claim 4, characterized in that: The second rotating shaft (62) is internally fixed with a rotating rod (7); the rotating rod (7) is externally fixed with three sets of connecting rods (71); the connecting rods (71) are externally fixed with scrapers (72), and the scrapers (72) are attached to the inner wall of the injection pipe (1).

6. A slag improvement and injection device for shield tunneling projects according to claim 5, characterized in that: The scraper (72) has a storage cavity inside; the storage cavity is provided with multiple sets of vibrating balls (8).

7. A slag improvement and injection device for shield tunneling projects according to claim 6, characterized in that: An overflow pipe (9) is fixedly connected inside the injection pipe (1), and the overflow pipe (9) passes through the injection pipe (1); the overflow pipe (9) is connected to the injection pipe (1); a filter screen (91) is fixedly connected inside the overflow pipe (9).

8. A slag improvement and injection device for shield tunneling projects according to claim 7, characterized in that: Multiple sets of elastic pull ropes (92) are fixed inside the overflow pipe (9); a ball plug (93) is fixed outside the elastic pull rope (92) and located at the port of the overflow pipe (9); an arc-shaped hole is opened inside the ball plug (93).

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