Method and device for preventing slag deposition in cutter cylinder of shield tunneling machine

Abstract

The invention discloses a method and a device for preventing slag accumulation in a shield tunneling machine cutter cylinder, and relates to the field of tunnel construction equipment, and the technical scheme is that the device comprises a cutter cylinder, a hob is rotatably mounted at the top of the cutter cylinder, an inner wall slag removal mechanism is mounted in the cutter cylinder, and the inner wall slag removal mechanism comprises an end cover, a rotating plate, a slag removal roller and a slag scraping assembly; the end cover is installed in the cutter cylinder, the rotating plate is rotatably installed at the upper end of the end cover, a first rotating shaft and a second rotating shaft are rotatably installed at the edge of the rotating plate, the slag removing roller is fixedly installed on the first rotating shaft, the slag scraping assembly is installed on the second rotating shaft, and a reciprocating lead screw is rotatably installed at the axis of the end cover. A planetary gear assembly is installed in the end cover, and the reciprocating lead screw is connected with the first rotating shaft through the planetary gear assembly. According to the device, a shear force field is formed through space staggered layout, differential treatment of a loose slag layer and a stubborn slag layer is considered, the effect of cleaning the inner wall of the cutter cylinder is greatly improved, and sludge accumulation is effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction equipment, and more specifically, to a method and device for preventing slag accumulation inside a cutter barrel of a shield machine. Background Art

[0002] As a carrier for cutters, the cylindrical internal space of the cutter barrel of a shield machine is prone to form a slag accumulation layer due to the centrifugal accumulation and frictional adhesion of muck. The slag accumulation leads to an increase in cutter load, a decrease in slag discharge efficiency, and an aggravation of equipment wear, directly affecting the continuous tunneling ability and construction safety of the shield machine.

[0003] Some existing technologies propose to clean the inner wall through mechanical transmission or fluid flushing, but generally there are problems such as complex transmission structures and unstable cleaning effects. For example, it is difficult for a traditional planetary gear transmission mechanism to simultaneously achieve the coordinated movement of the revolution and rotation of the slag removal roller, resulting in insufficient cleaning coverage; while the fixed-angle scraper cannot adapt to slag accumulations of different thicknesses and is prone to damage the inner wall of the cutter barrel due to rigid contact. Therefore, there is an urgent need for a new slag removal mechanism that can efficiently and adaptively clean the slag accumulation on the inner wall of the cutter barrel, and at the same time has a compact structure and stable operation. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a method and device for preventing slag accumulation inside a cutter barrel of a shield machine. By arranging an inner wall slag removal machine inside the cutter barrel, the inner wall slag removal mechanism includes a reciprocating lead screw, a slag removal roller, and a slag scraping assembly. The reciprocating lead screw can drive the slag removal roller to rotate around the reciprocating lead screw as an axis while rotating itself, and can drive the slag scraping assembly to rotate intermittently while the reciprocating lead screw rotates. Both the slag removal roller and the slag scraping assembly can clean the slag accumulation on the inner wall of the cutter barrel. The combined revolution and rotation movement of the slag removal roller can break hard agglomerates, and the intermittent rotation of the slag scraping assembly is precise, achieving full-inner-wall coverage cleaning. The two form a shear force field through spatial staggered layout, taking into account the differential treatment of loose slag layers and stubborn slag layers, greatly improving the cleaning effect of the inner wall of the cutter barrel and effectively preventing muck accumulation.

[0005] To achieve the above object, the present invention provides the following technical solution: An anti-slag accumulation device inside a cutter barrel of a shield machine, comprising a cutter barrel, a hob is rotatably installed at the top of the cutter barrel, an inner wall slag removal mechanism is installed inside the cutter barrel, the inner wall slag removal mechanism includes an end cover, a rotating plate, a slag removal roller and a slag scraping assembly, the end cover is fixedly installed inside the cutter barrel, the rotating plate is rotatably installed at the upper end of the end cover, a rotating shaft one and a rotating shaft two are rotatably installed at the edge of the rotating plate, the slag removal roller is fixedly installed on the rotating shaft one, the slag scraping assembly is installed on the rotating shaft two, a reciprocating lead screw is rotatably installed at the center of the end cover, a planetary gear assembly is installed inside the end cover, the reciprocating lead screw is connected to the rotating shaft one through the planetary gear assembly, the reciprocating lead screw can drive the rotating shaft one to rotate around the reciprocating lead screw as an axis while rotating itself, and both the slag removal roller and the slag scraping assembly can clean the accumulated slag on the inner wall of the cutter barrel.

[0006] As a further improvement of the present invention, the planetary gear assembly includes a sun gear, an internal gear ring and a planetary gear, the sun gear is fixedly installed at the lower end of the reciprocating lead screw, the planetary gear is fixedly installed at the lower end of the rotating shaft one, the internal gear ring is fixedly installed inside the end cover, the internal gear ring is coaxially arranged with the sun gear, and the planetary gear meshes with both the sun gear and the internal gear ring.

[0007] As a further improvement of the present invention, a Geneva drive is provided inside the end cover, the Geneva drive includes a driving wheel and a driven wheel, the driving wheel is fixedly installed at the upper end of the sun gear, the driven wheel is fixedly installed at the lower end of the rotating shaft two, the driving wheel can intermittently drive the driven wheel to rotate; the slag scraping assembly includes a bracket and a plurality of scraping plates, the bracket is fixedly installed on the rotating shaft two, and the plurality of scraping plates are arranged in a circular array at the edge of the bracket.

[0008] As a further improvement of the present invention, a positioning plate and a pushing column are fixedly installed at the upper end of the driving wheel, the positioning plate is coaxially arranged with the driving wheel, the pushing column is arranged on one side of the positioning plate, an arc-shaped groove is provided on one side of the positioning plate, the position of the arc-shaped groove corresponds to the position of the pushing column, a plurality of positioning grooves and notches are arranged in a circular array at the edge of the driven wheel, and the plurality of positioning grooves and the plurality of notches are staggered, the positioning plate fits one of the positioning grooves, and the position of the pushing column corresponds to the position of the notch.

[0009] As a further improvement of the present invention, a plurality of telescopic cavities are arranged in a circular array at both ends of the bracket, telescopic rods are fixedly installed at both ends of the scraping plate, each telescopic rod penetrates into the corresponding telescopic cavity, a moving plate is fixedly installed at one end of the telescopic rod, a spring is arranged in the telescopic cavity, one end of the spring is fixedly installed at one end of the telescopic cavity, and the other end of the spring is fixedly connected to the moving plate.

[0010] As a further improvement of the present invention, a cleaning assembly is installed on the reciprocating lead screw. The cleaning assembly includes a lead screw nut and a lifting block. The lead screw nut is sleeved on the reciprocating lead screw and is matched with it. The lifting block is sleeved on the lead screw nut. A guide rod is fixedly installed at the upper end of the rotating plate. The guide rod passes through the lifting block. A cleaning brush is fixedly installed at one end of the lifting block. The cleaning brush is arranged in contact with the slag removal roller. A cleaning plate is fixedly installed at the other end of the lifting block. The cleaning plate is arranged in contact with one of the scraping plates.

[0011] As a further improvement of the present invention, one side of the scraping plate is provided with an inclined surface, and one side of the cleaning plate facing the inclined surface is provided with an inclined edge. The inclination degrees of the inclined surface and the inclined edge are the same.

[0012] As a further improvement of the present invention, a driving fan is rotatably installed at the lower end of the end cover. The lower end of the reciprocating lead screw passes through the end cover and is fixedly connected to the axis center of the driving fan. Water flow openings are provided at the edge of the end cover.

[0013] As a further improvement of the present invention, a plurality of slag discharge grooves are arranged in an annular array on the inner wall of the cutter barrel. The slag discharge grooves are arranged in a spiral shape, and the spiral direction of the slag discharge grooves is the same as the rotation direction of the cutter barrel. A plurality of slag discharge ports are arranged in an annular array at the bottom of the cutter barrel. Each of the slag discharge ports is communicated with the lower end of the corresponding slag discharge groove; Two scraping plates are symmetrically and fixedly installed at the upper end of the cutter barrel. One side of the two scraping plates facing each other is arranged in contact with the hob.

[0014] A method for preventing slag accumulation inside the cutter barrel of a shield machine uses the above-mentioned device for preventing slag accumulation inside the cutter barrel of a shield machine, and includes the following steps: After the rotary drive shield machine starts, the cutter barrel rotates with the main machine, and the top hob cuts the rock and soil synchronously. Due to the spiral direction of the slag discharge grooves on the inner wall of the cutter barrel being the same as the rotation direction of the cutter barrel, an initial centrifugal slag discharge force is formed, and part of the loose accumulated slag moves along the slag discharge grooves towards the bottom slag discharge ports; The reciprocating lead screw is driven to rotate by a driving source. The rotating shaft one is driven by the planetary gear assembly to rotate around the reciprocating lead screw as an axis while rotating self - rotatably. The rotating plate rotates synchronously with the rotating shaft one. The scraping assembly rotates along with the rotating plate in contact with the inner wall of the cutter barrel. The scraping assembly scrapes the mud and slag on the inner wall of the cutter barrel, and the slag removal roller can rotate self - rotatably to remove the mud and slag that is more firmly adhered to the inner wall of the cutter barrel.

[0015] The beneficial effects of the present invention: 1. By arranging an inner wall slag remover inside the cutter barrel, the inner wall slag removing mechanism includes a reciprocating lead screw, a slag removing roller and a slag scraping component. The reciprocating lead screw can drive the slag removing roller to rotate around the reciprocating lead screw as the axis while rotating itself, and can drive the slag scraping component to rotate intermittently while rotating around the reciprocating lead screw. Both the slag removing roller and the slag scraping component can clean the accumulated slag on the inner wall of the cutter barrel. The compound revolution and rotation movement of the slag removing roller can break hard caked lumps. The intermittent rotation of the slag scraping component is precise, realizing full inner wall coverage cleaning. The two form a shear force field through spatial staggered layout, taking into account the differential treatment of loose slag layers and stubborn slag layers, greatly improving the effect of cleaning the inner wall of the cutter barrel and effectively preventing mud slag accumulation.

[0016] 2. By installing a cleaning component on the reciprocating lead screw, the cleaning component includes a lifting block and cleaning brushes and cleaning plates installed on both sides of the lifting block. The rotation of the reciprocating lead screw drives the lifting block to move up and down. The cleaning brushes can clean the slag removing roller, and the cleaning plates can scrape the mud slag adhered to the scraper, avoiding the adhesion of mud slag on the slag removing roller and the scraper and improving the slag removal effect on the cutter barrel.

[0017] 3. By rotatably installing a driving fan at the lower end of the end cover, the lower end of the reciprocating lead screw passes through the end cover and is fixedly connected to the axis of the driving fan. There are water circulation openings at the edge of the end cover. When the circulating water inside the shield machine or the external high-pressure water enters and exits the cutter barrel through the water circulation openings, it will drive the driving fan to rotate, and the driving fan drives the reciprocating lead screw to rotate, thereby providing power for the operation of the entire inner wall slag removing mechanism, eliminating the need to set up a power source and consuming less energy.

[0018] 4. By arranging a plurality of slag discharge grooves in a circular array on the inner wall of the cutter barrel, the slag discharge grooves are arranged in a spiral shape. A plurality of slag discharge ports are arranged in a circular array at the bottom of the cutter barrel, and each slag discharge port is respectively communicated with the lower end of the corresponding slag discharge groove. The spiral direction of the slag discharge groove is the same as the rotation direction of the cutter barrel. When the cutter barrel rotates, the centrifugal force generated and the spiral structure will jointly push the mud slag to move along the slag discharge groove and finally discharge from the slag discharge port. If the spiral direction is opposite to the rotation direction, the slag discharge groove will generate a reverse thrust on the muck when the cutter barrel rotates, resulting in a decrease in slag discharge efficiency or even blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a sectional structural schematic diagram of the present invention; Figure 3 is a structural schematic diagram of the inner wall slag removing mechanism of the present invention; Figure 4 is a plane sectional structural schematic diagram of the inner wall slag removing mechanism of the present invention; Figure 5 is a structural schematic diagram inside the end cover of the present invention; Figure 6Schematic structural diagram of the Geneva drive of the present invention; Figure 7 Schematic structural diagram of the slag scraping assembly of the present invention; Figure 8 is Figure 7 Enlarged view at position A in Figure 9 Schematic three-dimensional sectional structure diagram of the inner wall slag removal mechanism of the present invention; Figure 10 is Figure 9 Enlarged view at position B in

[0020] Explanation of reference numerals: 1. Knife barrel; 101. Hob; 102. Slag scraping plate; 103. Slag discharge groove; 104. Slag discharge port; 2. Inner wall slag removal mechanism; 201. End cover; 202. Rotating plate; 203. Slag removal roller; 204. Slag scraping assembly; 2041. Bracket; 2042. Scraper; 2043. Telescopic rod; 2044. Moving plate; 2045. Spring; 2046. Telescopic cavity; 205. Reciprocating lead screw; 206. Cleaning assembly; 2061. Lead screw nut; 2062. Lifting block; 2063. Cleaning brush; 2064. Cleaning plate; 207. Guide rod; 208. Driving fan; 209. Water flow port; 210. Planetary gear assembly; 2101. Sun gear; 2102. Inner tooth ring; 2103. Planet gear; 211. Geneva drive; 2111. Driving wheel; 2112. Driven wheel; 2113. Positioning plate; 2114. Pushing column; 2115. Notch; 212. Rotating shaft one; 213. Rotating shaft two. Detailed implementation manners

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The components of the embodiments of the present disclosure described and illustrated herein can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure is not intended to limit the scope of the present disclosure claimed, but merely represents selected embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts fall within the scope of protection of the present disclosure.

[0022] Refer to Figures 1 to 4As shown in the figure, this is a specific implementation of the slag accumulation prevention device inside the cutter barrel of a shield machine according to the present invention, including a cutter barrel 1. A hob 101 is rotatably installed at the top of the cutter barrel 1. An inner wall slag removal mechanism 2 is installed inside the cutter barrel 1. The inner wall slag removal mechanism 2 includes an end cover 201, a rotating plate 202, a slag removal roller 203 and a slag scraping assembly 204. The end cover 201 is fixedly installed inside the cutter barrel 1. The rotating plate 202 is rotatably installed at the upper end of the end cover 201. A first rotating shaft 212 and a second rotating shaft 213 are rotatably installed at the edge of the rotating plate 202. The slag removal roller 203 is fixedly installed on the first rotating shaft 212. The slag scraping assembly 204 is installed on the second rotating shaft 213. A reciprocating lead screw 205 is rotatably installed at the center of the end cover 201. A planetary gear assembly 210 is installed inside the end cover 201. The reciprocating lead screw 205 is connected to the first rotating shaft 212 through the planetary gear assembly 210. The reciprocating lead screw 205 can drive the first rotating shaft 212 to rotate around the reciprocating lead screw 205 while rotating itself. Both the slag removal roller 203 and the slag scraping assembly 204 can clean the accumulated slag on the inner wall of the cutter barrel 1. Since the reciprocating lead screw 205 can drive the first rotating shaft 212 to rotate around the reciprocating lead screw 205 while rotating itself, the reciprocating lead screw 205 can drive the rotating plate 202 to rotate. And the slag scraping assembly 204 is installed on the rotating plate 202, so the slag scraping assembly 204 also rotates in contact with the inner wall of the cutter barrel 1. The slag scraping assembly 204 scrapes the mud slag on the inner wall of the cutter barrel 1. And since the slag removal roller 203 can rotate itself, it can remove the mud slag that is relatively firmly adhered to the inner wall of the cutter barrel 1. The two cooperate, greatly improving the cleaning effect of the inner wall of the cutter barrel 1 and effectively preventing mud slag accumulation.

[0023] In a further embodiment, as Figure 5 shown, the planetary gear assembly 210 includes a sun gear 2101, an internal gear ring 2102 and a planetary gear 2103. The sun gear 2101 is fixedly installed at the lower end of the reciprocating lead screw 205. The planetary gear 2103 is fixedly installed at the lower end of the first rotating shaft 212. The internal gear ring 2102 is fixedly installed inside the end cover 201. The internal gear ring 2102 is coaxially arranged with the sun gear 2101. The planetary gear 2103 meshes with both the sun gear 2101 and the internal gear ring 2102. Driving the reciprocating lead screw 205 to rotate drives the sun gear 2101 to rotate. Under the combined action of the sun gear 2101 and the internal gear ring 2102, the planetary gear 2103 rotates around the reciprocating lead screw 205 while rotating itself, thereby driving the first rotating shaft 212 and the slag removal roller 203 to move synchronously.

[0024] In a further embodiment, a Geneva drive 211 is provided inside the end cap 201. The Geneva drive 211 includes a driving wheel 2111 and a driven wheel 2112. The driving wheel 2111 is fixedly installed at the upper end of the sun gear 2101, and the driven wheel 2112 is fixedly installed at the lower end of the second rotating shaft 213. The driving wheel 2111 can intermittently drive the driven wheel 2112 to rotate. As Figure 6 shown, a positioning plate 2113 and a pushing column 2114 are fixedly installed at the upper end of the driving wheel 2111. The positioning plate 2113 is coaxially arranged with the driving wheel 2111. The pushing column 2114 is arranged on one side of the positioning plate 2113. An arc-shaped groove is provided on one side of the positioning plate 2113, and the position of the arc-shaped groove corresponds to the position of the pushing column 2114. A plurality of positioning grooves and notches 2115 are arranged in a circular array at the edge of the driven wheel 2112, and the plurality of positioning grooves and the plurality of notches 2115 are arranged alternately. The positioning plate 2113 is attached to one of the positioning grooves, and the position of the pushing column 2114 corresponds to the position of the notch 2115. When the reciprocating lead screw 205 rotates, it drives the driving wheel 2111 to rotate synchronously, while the driven wheel 2112 rotates with the rotating plate 202. Since the angular velocity of the rotation of the reciprocating lead screw 205 is greater than the angular velocity of the rotation of the rotating plate 202, the driving wheel 2111 rotates relative to the driven wheel 2112. Before the pushing column 2114 reaches the notch 2115, the positioning plate 2113 acts on the positioning groove to ensure that the driven wheel 2112 does not rotate by itself. When the pushing column 2114 reaches the corresponding notch 2115, it acts on the corresponding notch 2115, driving the driven wheel 2112 to rotate a specific angle, achieving an intermittent driving effect. The slag scraping assembly 204 includes a bracket 2041 and a plurality of scraping plates 2042. The bracket 2041 is fixedly installed on the second rotating shaft 213, and the plurality of scraping plates 2042 are arranged in a circular array at the edge of the bracket 2041. The driven wheel 2112 rotates intermittently, driving the bracket 2041 to rotate intermittently, and intermittently switching the scraping plates 2042 that are in contact with the cutter cylinder 1.

[0025] In a further embodiment, as Figure 7 and Figure 8As shown, a plurality of telescopic cavities 2046 are arranged in an annular array at both ends of the bracket 2041. Telescopic rods 2043 are fixedly installed at both ends of the scraping plate 2042. Each telescopic rod 2043 penetrates into the corresponding telescopic cavity 2046. A moving plate 2044 is fixedly installed at one end of the telescopic rod 2043. A spring 2045 is arranged in the telescopic cavity 2046. One end of the spring 2045 is fixedly installed at one end of the telescopic cavity 2046, and the other end of the spring 2045 is fixedly connected to the moving plate 2044. When the scraping plate 2042 is pushed towards the bracket 2041, the telescopic rod 2043 will drive the moving plate 2044 to compress the spring 2045, and the telescopic rod 2043 will retract into the telescopic cavity 2046, so that the scraping plate 2042 has a certain range of movement. Under the elastic force of the spring 2045, the scraping plate 2042 can squeeze the inner wall of the cutter cylinder 1 with a certain pressure, which is more conducive to scraping the mud residue on the inner wall of the cutter cylinder 1. When the mud residue is adhered firmly, the scraping plate 2042 can retract to avoid blocking the normal rotation of the slag scraping assembly 204.

[0026] In a further embodiment, as Figure 9 and Figure 10As shown, a cleaning assembly 206 is installed on the reciprocating screw 205, and the cleaning assembly 206 includes a screw nut 2061 and a lifting block 2062. The screw nut 2061 is sleeved on the reciprocating screw 205 and cooperates with it. The lifting block 2062 is sleeved on the screw nut 2061. A guide rod 207 is fixedly installed on the upper end of the rotating plate 202. The guide rod 207 is inserted through the lifting block 2062. A cleaning brush 2063 is fixedly installed on one end of the lifting block 2062. The cleaning brush 2063 is in contact with the slag removal roller 203. A cleaning plate 2064 is fixedly installed on the other end of the lifting block 2062, and the cleaning plate 2064 is arranged in contact with one of the scrapers 2042. Since the angular velocity of the reciprocating screw 205 is greater than that of the rotating plate 202, the reciprocating screw 205 rotates relative to the guide rod 207. The rotation of the reciprocating screw 205 drives the screw nut 2061 and the lifting block 2062 to move up and down in a reciprocating manner. The cleaning brush 2063 cleans the mud residue adhered to the surface of the slag removal roller 203, and the cleaning plate 2064 cleans the mud residue adhered to the surface of the scraper 2042. The scraper 2042 is provided with a bevel on one side, which cooperates with the structural setting in the telescopic cavity 2046. When there is slag that is firmly bonded on the inner wall of the knife cylinder 1, the slag contacts the bevel to push the telescopic rod 2043 to retract, and the scraper 2042 staggers the firm slag to avoid blocking the normal rotation of the scraper assembly 204. The cleaning plate 2064 is provided with a bevel on the side facing the bevel, and the inclination degree of the bevel is the same as that of the bevel, so that the cleaning plate 2064 can fit tightly with the scraper 2042. When the cleaning plate 2064 moves up and down, the scraper 2042 can be cleaned more effectively. At the same time, when the scraper 2042 is switched, the cleaning plate 2064 acts on the bevel to facilitate the retraction of the scraper 2042 and avoid affecting the rotation of the scraper assembly 204.

[0027] In a further embodiment, a driving fan 208 is rotatably installed at the lower end of the end cover 201. The lower end of the reciprocating lead screw 205 passes through the end cover 201 and is fixedly connected to the axis of the driving fan 208. A water circulation port 209 is provided at the edge of the end cover 201. When the circulating water inside the shield machine or the external high-pressure water (such as formation seepage water, grouting water) enters and exits the cutter barrel 1 through the water circulation port 209, it will drive the driving fan 208 to rotate. The driving fan 208 drives the reciprocating lead screw 205 to rotate, thereby providing power for the operation of the entire inner wall slag removal mechanism 2. Through the self-powered design driven by water flow, the inner wall slag removal mechanism 2 realizes operation without external power connection, significantly reducing energy consumption and equipment complexity. The linkage structure between the driving fan 208 and the reciprocating lead screw 205 is compact and efficient, converting the natural kinetic energy of the circulating water or external water source into mechanical power, avoiding both the energy consumption and heat dissipation problems of traditional motor drive, and ensuring the stability of the slag removal operation through the persistence of fluid power. The layout of the water circulation port 209 takes into account both the circulation efficiency and the sealing performance, ensuring reliable operation under complex working conditions, reducing maintenance requirements, and improving the overall economy and environmental adaptability of the equipment.

[0028] In a further embodiment, a plurality of slag discharge grooves 103 are arranged in a circular array on the inner wall of the cutter barrel 1. The slag discharge grooves 103 are arranged in a spiral shape. A plurality of slag discharge ports 104 are arranged in a circular array at the bottom of the cutter barrel 1. Each of the slag discharge ports 104 is communicated with the lower end of the corresponding slag discharge groove 103. The spiral direction of the slag discharge groove 103 is the same as the rotation direction of the cutter barrel 1. When the cutter barrel 1 rotates, the centrifugal force generated and the spiral structure will jointly push the mud slag to move along the slag discharge groove 103 and finally discharge from the slag discharge port 104. If the spiral direction is opposite to the rotation direction, the slag discharge groove 103 will generate a reverse thrust on the muck when the cutter barrel 1 rotates, resulting in a reduction in slag discharge efficiency or even blockage.

[0029] In a further embodiment, two scraping plates 102 are symmetrically and fixedly installed at the upper end of the cutter barrel 1. One side of the two scraping plates 102 facing each other is attached to the hob 101 to scrape the mud slag adhered to the hob 101 at the upper end of the cutter barrel 1.

[0030] A method for preventing slag accumulation inside the cutter barrel of a shield machine uses the above-mentioned device for preventing slag accumulation inside the cutter barrel of a shield machine, and includes the following steps: After the rotary drive shield machine is started, the cutter barrel 1 rotates with the main machine, and the top hob 101 synchronously cuts the rock and soil. The slag discharge grooves 103 on the inner wall of the cutter barrel 1 form an initial centrifugal slag discharge force due to the spiral direction being consistent with the rotation direction of the cutter barrel 1, and part of the loose accumulated slag moves along the slag discharge grooves 103 towards the bottom slag discharge ports 104; The reciprocating lead screw 205 is driven to rotate by a driving source. The planetary gear assembly 210 drives the first rotating shaft 212 to rotate around the reciprocating lead screw 205 as an axis while performing self-rotation. The rotating plate 202 rotates synchronously with the first rotating shaft 212. Driven by the rotating plate 202, the slag scraping assembly 204 also rotates along the inner wall of the cutter cylinder 1. The slag scraping assembly 204 scrapes the mud and slag on the inner wall of the cutter cylinder 1. Since the slag removing roller 203 can rotate by itself, it can remove the mud and slag that is relatively firmly adhered to the inner wall of the cutter cylinder 1.

[0031] Finally, it should be noted that the above-described embodiments are only specific implementation manners of the present disclosure, used to illustrate the technical solutions of the present disclosure, rather than limiting them. The protection scope of the present disclosure is not limited thereto. Although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present disclosure can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should all be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An anti-accumulation device inside the cutter barrel of a shield machine, comprising a cutter barrel (1), wherein a hob (101) is rotatably installed at the top of the cutter barrel (1), and it is characterized in that, An inner wall slag removal mechanism (2) is installed inside the cutter barrel (1). The inner wall slag removal mechanism (2) includes an end cover (201), a rotating plate (202), a slag removal roller (203) and a slag scraping assembly (204). The end cover (201) is fixedly installed inside the cutter barrel (1). The rotating plate (202) is rotatably installed at the upper end of the end cover (201). A first rotating shaft (212) and a second rotating shaft (213) are rotatably installed at the edge of the rotating plate (202). The slag removal roller (203) is fixedly installed on the first rotating shaft (212). The slag scraping assembly (204) is installed on the second rotating shaft (213). A reciprocating lead screw (205) is rotatably installed at the center of the end cover (201). A planetary gear assembly (210) is installed inside the end cover (201). The reciprocating lead screw (205) is connected to the first rotating shaft (212) through the planetary gear assembly (210). The reciprocating lead screw (205) can drive the first rotating shaft (212) to rotate around the reciprocating lead screw (205) as the axis while rotating itself. Both the slag removal roller (203) and the slag scraping assembly (204) can clean the accumulated slag on the inner wall of the cutter barrel (1).

2. The slag accumulation prevention device inside the cutter barrel of the shield machine according to claim 1, characterized in that, The planetary gear assembly (210) includes a sun gear (2101), an internal gear ring (2102) and a planetary gear (2103). The sun gear (2101) is fixedly installed at the lower end of the reciprocating lead screw (205). The planetary gear (2103) is fixedly installed at the lower end of the first rotating shaft (212). The internal gear ring (2102) is fixedly installed inside the end cover (201). The internal gear ring (2102) and the sun gear (2101) are coaxially arranged. The planetary gear (2103) meshes with both the sun gear (2101) and the internal gear ring (2102).

3. The slag accumulation prevention device inside the cutter barrel of the shield machine according to claim 2, wherein A Geneva drive (211) is provided inside the end cover (201). The Geneva drive (211) includes a driving wheel (2111) and a driven wheel (2112). The driving wheel (2111) is fixedly installed at the upper end of the sun gear (2101). The driven wheel (2112) is fixedly installed at the lower end of the second rotating shaft (213). The driving wheel (2111) can intermittently drive the driven wheel (2112) to rotate; The slag scraping assembly (204) includes a bracket (2041) and a plurality of scraping plates (2042). The bracket (2041) is fixedly installed on the second rotating shaft (213). The plurality of scraping plates (2042) are arranged in a circular array at the edge of the bracket (2041).

4. The slag accumulation prevention device inside the cutter barrel of the shield machine according to claim 3, wherein, A positioning plate (2113) and a pushing column (2114) are fixedly installed at the upper end of the driving wheel (2111). The positioning plate (2113) is coaxially arranged with the driving wheel (2111). The pushing column (2114) is arranged on one side of the positioning plate (2113). An arc-shaped groove is provided on one side of the positioning plate (2113), and the position of the arc-shaped groove corresponds to the position of the pushing column (2114). A plurality of positioning grooves and notches (2115) are arranged in a circular array at the edge of the driven wheel (2112), and the plurality of positioning grooves and the plurality of notches (2115) are arranged alternately. The positioning plate (2113) is attached to one of the positioning grooves, and the position of the pushing column (2114) corresponds to the position of the notch (2115).

5. The slag accumulation prevention device inside the cutter barrel of the shield machine according to claim 3, wherein, A plurality of telescopic cavities (2046) are arranged in a circular array at both ends of the bracket (2041). Telescopic rods (2043) are fixedly installed at both ends of the scraper (2042). Each telescopic rod (2043) penetrates into the corresponding telescopic cavity (2046). A moving plate (2044) is fixedly installed at one end of the telescopic rod (2043). A spring (2045) is arranged in the telescopic cavity (2046). One end of the spring (2045) is fixedly installed at one end of the telescopic cavity (2046), and the other end of the spring (2045) is fixedly connected to the moving plate (2044).

6. The anti-accumulation device inside the cutter barrel of the shield machine according to claim 3, characterized in that, A cleaning assembly (206) is installed on the reciprocating lead screw (205). The cleaning assembly (206) includes a lead screw nut (2061) and a lifting block (2062). The lead screw nut (2061) is sleeved on the reciprocating lead screw (205) and is matched with it. The lifting block (2062) is sleeved on the lead screw nut (2061). A guide rod (207) is fixedly installed at the upper end of the rotating plate (202). The guide rod (207) penetrates through the lifting block (2062). A cleaning brush (2063) is fixedly installed at one end of the lifting block (2062). The cleaning brush (2063) is attached to the slag removing roller (203). A cleaning plate (2064) is fixedly installed at the other end of the lifting block (2062). The cleaning plate (2064) is attached to one of the scrapers (2042).

7. The slag accumulation prevention device inside the cutter barrel of the shield machine according to claim 6, wherein One side of the scraper (2042) is provided with an inclined surface, and one side of the cleaning plate (2064) facing the inclined surface is provided with an inclined edge. The inclination degrees of the inclined surface and the inclined edge are the same.

8. The slag accumulation prevention device inside the cutter barrel of the shield machine according to claim 6, characterized in that A driving fan (208) is rotatably installed at the lower end of the end cover (201). The lower end of the reciprocating lead screw (205) penetrates through the end cover (201) and is fixedly connected to the axis of the driving fan (208). A water circulation port (209) is provided at the edge of the end cover (201).

9. The slag accumulation prevention device inside the cutter barrel of the shield machine according to claim 1, wherein A plurality of slag discharge grooves (103) are arranged in an annular array on the inner wall of the cutter barrel (1). The slag discharge grooves (103) are arranged in a spiral shape, and the spiral direction of the slag discharge grooves (103) is the same as the rotation direction of the cutter barrel (1). A plurality of slag discharge ports (104) are arranged in an annular array at the bottom of the cutter barrel (1), and each of the slag discharge ports (104) is communicated with the lower end of the corresponding slag discharge groove (103); Two slag scraping plates (102) are symmetrically and fixedly installed at the upper end of the cutter barrel (1), and one side of the two slag scraping plates (102) facing each other is attached to the hob (101).

10. A method for preventing slag accumulation inside the cutter barrel of a shield machine, which uses the device for preventing slag accumulation inside the cutter barrel of a shield machine according to any one of claims 1-9, characterized in that, The method comprises the following steps: After the rotary drive shield machine is started, the cutter barrel (1) rotates with the main machine, and the top hob (101) synchronously cuts the rock and soil. Since the spiral direction of the slag discharge grooves (103) on the inner wall of the cutter barrel (1) is consistent with the rotation direction of the cutter barrel (1), an initial centrifugal slag discharge force is formed, and part of the loose accumulated slag moves along the slag discharge grooves (103) towards the bottom slag discharge ports (104); The reciprocating lead screw (205) is driven by a drive source to rotate, and drives the rotating shaft one (212) to rotate around the reciprocating lead screw (205) as an axis and rotate self - rotatably through the planetary gear assembly (210). The rotating plate (202) rotates synchronously with the rotating shaft one (212). Driven by the rotating plate (202), the slag scraping assembly (204) also rotates along the inner wall of the cutter barrel (1). The slag scraping assembly (204) scrapes the mud and slag on the inner wall of the cutter barrel (1), and since the slag removing roller (203) can rotate self - rotatably, it can remove the mud and slag firmly adhered to the inner wall of the cutter barrel (1).

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