CN111472800A - Grid knife type pipe jacking machine head - Google Patents
Grid knife type pipe jacking machine head Download PDFInfo
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- CN111472800A CN111472800A CN202010271581.8A CN202010271581A CN111472800A CN 111472800 A CN111472800 A CN 111472800A CN 202010271581 A CN202010271581 A CN 202010271581A CN 111472800 A CN111472800 A CN 111472800A
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- machine head
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- 238000002955 isolation Methods 0.000 claims abstract description 60
- 238000005192 partition Methods 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000002689 soil Substances 0.000 claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 230000004888 barrier function Effects 0.000 claims abstract description 9
- 230000004323 axial length Effects 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 17
- 239000011449 brick Substances 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000009412 basement excavation Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 108010066057 cabin-1 Proteins 0.000 description 21
- 108010066114 cabin-2 Proteins 0.000 description 16
- 238000000034 method Methods 0.000 description 16
- 239000000203 mixture Substances 0.000 description 13
- 230000008569 process Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/13—Devices for removing or hauling away excavated material or spoil; Working or loading platforms using hydraulic or pneumatic conveying means
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a machine head structure of pipe jacking equipment, in particular to a grid knife type pipe jacking machine head, which solves the technical problems in the background technology and comprises a working cabin and an operation cabin, wherein a grid cutter disc for cutting soil is arranged at the front end of the working cabin, a partition support wall is arranged in the rear half part of the working cabin, an isolation door is arranged at the lower part of the partition support wall, an isolation baffle plate for preventing water or silt from entering the operation cabin is arranged at the bottom in the working cabin behind the partition support wall, and the axial distance and the relative height between the isolation baffle plate and the partition support wall ensure that a person can pass through the isolation door after crossing the isolation baffle plate; the working cabin is connected with the operation cabin through a hydraulic cylinder component. The invention is suitable for special geological construction such as adding a small amount of large-diameter gravel into jacking soil, filling the geological brick-containing concrete block with impurities and the like, can realize manual excavation and transportation, does not need to excavate a third foundation pit on the ground above the barrier, is time-saving and labor-saving, has wide applicability, is widely applied to railway pipe jacking construction, and increases the safety index of operators.
Description
Technical Field
The invention relates to a machine head structure of pipe jacking equipment, in particular to a grid knife type pipe jacking machine head.
Background
The existing-stage pipe jacking technology in China mainly comprises two construction methods, namely an artificial pipe jacking method and a mechanical pipe jacking method. The mechanical jacking pipe is divided into earth pressure balanced type jacking pipe construction, muddy water balanced type jacking pipe construction and air pressure balanced type jacking pipe construction. During pipe jacking construction, a foundation pit is dug at two ends of a construction section respectively, then force transmission jacking iron and a guide rail are arranged in the foundation pit, a hydraulic jack supported on a rear seat of the foundation pit is used for pressing the pipe body into a soil layer and pushing the pipe body towards the other foundation pit, and meanwhile, soil on the front side of the pipe body is dug out and transported away.
The slurry-water balanced type pipe jacking construction is suitable for underground water level high and long-distance pipe jacking construction. In middle and small-sized projects, a totally-enclosed rotary cutting type pipe jacking machine head is usually used for muddy water balanced type pipe jacking construction, but if large-diameter gravel or other special impurity-filled geological materials are encountered in the jacking process, the head is easily clamped and cannot be drilled, jacking is interrupted, a third foundation pit is usually dug on the ground above a barrier, the operation is time-consuming and labor-consuming, the project progress is influenced, and if a traffic important road is formed on the road surface, the road surface traffic is seriously influenced. For example, the number of pipe jacking projects related to the railway main road is increased continuously, the uncertain factors of the geology are increased, and if the mud-water balanced type pipe jacking construction is adopted for jacking, the railway operation safety is greatly influenced when the special geology is interrupted.
Disclosure of Invention
The invention aims to solve the technical problems that a machine head is easy to block and cannot drill under the condition of large-diameter gravel or other special filling geological materials in slurry-water balanced type pipe jacking construction, jacking is interrupted, barriers are eliminated, time and labor are wasted, the engineering progress is influenced, and serious influence on road surface traffic is possibly caused, and provides a grid cutter type pipe jacking machine head.
The technical means for solving the technical problems of the invention is as follows: the grid knife type pipe jacking machine head comprises a working cabin and an operation cabin, wherein a grid cutter disc for cutting soil is arranged at the front end of the working cabin, a partition supporting wall is arranged in the rear half part of the working cabin, an isolation door is arranged at the lower part of the partition supporting wall, an isolation baffle plate for preventing water or silt from entering the operation cabin is arranged at the bottom in the working cabin behind the partition supporting wall, and the axial distance and the relative height between the isolation baffle plate and the partition supporting wall ensure that a person can pass through the isolation door after crossing the isolation baffle plate; the working cabin is connected with the operation cabin through a hydraulic cylinder assembly for correcting the jacking deviation.
In the jacking process of the machine head, the grid cutter head takes earth and jacks, so that the front geological stability can be ensured, and earthwork enters the working bin through the grid cutter head; the partition support wall not only plays a role in supporting the working cabin, but also can separate the operating cabin from the working cabin, so that the safety index of operators is increased; the partition supporting wall partitions the working cabin into a front cabin and a rear cabin, and the lower part of the partition supporting wall is provided with the isolating door, so that sand and sand mixtures such as gravel can be smoothly cleared out in the advancing process of the push bench; after entering the front cabin of the working cabin, workers can draw out large-diameter gravels and the like in the grid cutter head, and at the moment, the grid cutter head can play a role in supporting and protecting, so that casualties caused by collapse and the like in front of the machine head are prevented; when the machine does not work, the isolating door is closed, the machine head continues to push forwards until the interior of the working cabin at the front part of the isolating support wall is in a closed full cabin state, the geological state at the front end of the machine head is stable, and the pushing is stopped; the direction of the machine head can be finely adjusted through the hydraulic cylinder assembly, so that deviation rectification jacking deviation is realized.
During specific operation, the grid cutter head is in an earth-eating jacking state in the advancing process, cut earthwork enters a front cabin of a working cabin, a water flushing method (namely, the water flushing method uses high-pressure water to impact the cut earthwork to form a mud-water mixture) is adopted to discharge the mud-water mixture, a high-power mud pump is equipped to output the mud-water mixture in the working cabin, or when the water content of the cut earthwork is large, the mud pump can directly pump out the mud-water mixture, when the soil quality in the jacking front is soft, the jacking speed is accelerated, otherwise, the jacking speed is slowed, so that the mud-water balance in the jacking process can be ensured; the isolation baffle can prevent that mud-water mixture from entering into the operation cabin, under the prerequisite of guaranteeing operating personnel safety, has still guaranteed the clean and tidy of operation cabin working face.
Preferably, the isolating door is of an up-and-down push-and-pull type, the isolating door is driven by at least one supporting hydraulic cylinder which travels up and down, and the end part of a cylinder barrel of the supporting hydraulic cylinder is connected with the top of the working cabin; the end of the piston rod supporting the hydraulic cylinder is connected with the lower part of the isolation door. The supporting hydraulic cylinder not only can play a role in driving the isolating door to act, but also can close the isolating door and tightly push the working cabin when not working, so that the effect of supporting the working cabin is further played.
Preferably, the outer diameter of the rear end of the working cabin is reduced to form a first overlapping part with a cylindrical outer wall, the inner diameter of the front end of the working cabin is increased to form a second overlapping part with a cylindrical inner wall, the first overlapping part is inserted into the second overlapping part, and the axial length of the first overlapping part is greater than that of the second overlapping part; the cylinder end of the hydraulic cylinder assembly is hinged with the inner wall of the operation cabin, and the piston rod end of the hydraulic cylinder assembly is hinged with the rear end of the first lap joint part. The axial length of the first lap joint part is larger than that of the second lap joint part, so that after the first lap joint part is inserted into the second lap joint part, a gap is reserved between the front end of the first lap joint part and the front end of the second lap joint part, and a certain moving space is reserved when the hydraulic cylinder assembly is subjected to angle fine adjustment. The two ends of the hydraulic cylinder assembly are respectively hinged with the first lap joint part and the operation cabin, so that the angle fine adjustment is facilitated.
Preferably, the embedded setting of pneumatic cylinder subassembly is on the inner wall of operation cabin, and it has the breach to open on the operation cabin inner wall that is close to the second overlap joint portion in other words, and corresponding pneumatic cylinder subassembly just is placed to this breach, just so can make the tailpiece of the piston rod of hydraulic cylinder subassembly just be connected with the rear end terminal surface of first overlap joint portion, and the tip of being connected with pneumatic cylinder subassembly also can play better supporting role to the pneumatic cylinder subassembly in the breach moreover.
The invention has the advantages of ingenious conception, low manufacturing cost, simple operation, suitability for medium and small projects, suitability for special geological construction such as adding a small amount of large-diameter gravel into top soil, filling geological brick-containing concrete blocks with impurities and the like, when the machine head is clamped on special geological construction such as large-diameter gravel, miscellaneous filling geological concrete blocks containing bricks and the like, manual excavation and transportation can be realized, a third foundation pit does not need to be excavated on the ground above the barrier, time and labor are saved, the working efficiency is improved, well point dewatering treatment is not needed before jacking, the underground water can be resisted during jacking to keep balanced settlement, the applicability is wide, the application is extensive in the construction of railway push pipe, and various uncertain geologies can both jack-in, set up the insulated door and make easy maintenance, and the maintainer can directly get into the operation cabin, and the insulated door makes operation cabin and work cabin keep apart moreover, has increased operation personnel's safety index.
Drawings
FIG. 1 is a schematic view of the overall structure of a grid cutter type push bench head according to the present invention.
Fig. 2 is a schematic front structure view of the grid cutterhead according to the present invention.
Fig. 3 is a schematic structural view of the front side of the partition support wall according to the present invention.
Fig. 4 is a left side view of fig. 1.
Fig. 5 is a right side view of fig. 1.
In the figure: 1-a working cabin; 2-operating the cabin; 3-a grid cutter head; 4-partition support walls; 5-an isolation gate; 6-isolation baffle; 7-a hydraulic cylinder assembly; 8-supporting a hydraulic cylinder; 9-a first lap joint; 10-a second lap joint; 11-a directional regulating control valve; 12-an outer ring; 13-a separator; 14-reinforcing ribs.
Detailed Description
Referring to fig. 1 to 5, the grizzly blade type ejector head according to the present invention will be described in detail.
The grid knife type pipe jacking machine head comprises a working cabin 1 and an operating cabin 2, wherein a grid cutter head 3 used for cutting soil is arranged at the front end of the working cabin 1, the grid cutter head 3 is shown in fig. 2, a partition support wall 4 is arranged in the rear half part of the working cabin 1, and is shown in fig. 3, 4 and 5 specifically, an isolation door 5 is arranged at the lower part of the partition support wall 4, an isolation baffle 6 for preventing water or silt from entering the operating cabin 2 is arranged at the bottom in the working cabin 1 behind the partition support wall 4, and the isolation baffle 6 can penetrate through the isolation door 5 after crossing the isolation baffle 6 by the axial distance and the relative height between the isolation baffle 6 and the partition support wall 4; the working cabin 1 is connected with the operating cabin 2 through a hydraulic cylinder assembly 7 for correcting jacking deviation.
During the jacking process of the machine head, the grid cutter disc 3 is filled with soil and jacked, so that the front geological stability can be ensured, and earthwork enters the working bin through the grid cutter disc 3; the partition support wall 4 not only plays a role in supporting the working cabin 1, but also can separate the operating cabin 2 from the working cabin 1, so that the safety index of operators is increased, and reinforcing rib plates 14 which are uniformly distributed are connected between the two side surfaces of the partition support wall 4 and the inner wall of the working cabin 1; the partition supporting wall 4 partitions the working cabin 1 into a front cabin and a rear cabin, and the lower part of the partition supporting wall 4 is provided with an isolation door 5, so that sand and sand mixtures such as gravel can be smoothly cleared out in the advancing process of the push bench, and when large-diameter gravel or other special miscellaneous fill geology is encountered in the pushing process, workers can enter the front cabin of the working cabin 1 from the isolation door 5, the size of the isolation door 5 ensures that the workers can pass through the isolation door 5, and the axial distance between the isolation baffle 6 and the partition supporting wall 4 and the relative height of the isolation baffle 6 and the partition supporting wall ensure that the workers can pass through the isolation door 5 and enter the front cabin of the working cabin 1 after crossing the isolation baffle 6; after entering the front cabin of the working cabin 1, a worker can draw out large-diameter gravel and the like in the grid cutter head 3, and at the moment, the grid cutter head 3 can play a role in supporting and protecting to prevent casualties caused by collapse and the like in front of the machine head; when the machine does not work, the isolating door 5 is closed, and the machine head continues to be pushed forwards until the inside of the working cabin 1 at the front part of the partition supporting wall 4 is in a closed full-bin state, the geological state at the front end of the machine head is stable, and the pushing is stopped. The direction of the machine head can be finely adjusted through the hydraulic cylinder component 7, so that deviation rectification jacking deviation is realized. Specifically, when the isolation door 5 is lower than the isolation baffle 6, the distance between the isolation door 5 and the isolation baffle 6 is long enough to ensure that a worker can pass through the isolation door 5 after crossing the isolation baffle 6; or when the isolation door 5 is higher than the isolation baffle, and the height difference between the isolation door 5 and the isolation baffle 6 can ensure that the worker can pass through the isolation door 5 after crossing the isolation baffle 6, the distance between the isolation door 5 and the isolation baffle 6 does not need to be considered.
During specific operation, the grid cutter head 3 is in a soil-eating jacking state in the advancing process, cut earthwork enters a front cabin of the working cabin 1, a water flushing method (namely, the water flushing method uses high-pressure water to impact the cut earthwork to form a muddy water mixture) is adopted to discharge the muddy water mixture, a high-power slurry pump is arranged to output the muddy water mixture in the working cabin 1, or when the water content of the cut earthwork is large, the slurry pump can directly pump out the muddy water mixture, when the soil quality in the jacking front is soft, the jacking speed is accelerated, otherwise, the jacking speed is reduced, and therefore, the muddy water balance in the jacking process can be ensured; the isolation baffle 6 can prevent the muddy water mixture from entering the operation cabin 2, and under the premise of ensuring the safety of operators, the neatness of the working surface of the operation cabin 2 is also ensured. The grid knife type pipe jacking machine head is in contact fit with a jacked pipe body through the damping ring, so that the working cabin and the operating cabin are both cylindrical, the grid cutter head is also cylindrical, and in specific construction, the outer diameters of the working cabin and the operating cabin are set to be 3 m. The pipe jacking machine head is mainly suitable for downward-passing railway pipe jacking, so that the pipe jacking machine head is widely popularized in railway pipe jacking application.
Further, as a specific embodiment of the grid knife type pipe jacking machine head, the isolation door 5 is of a vertical push-pull type, the isolation door 5 is driven by at least one vertically walking supporting hydraulic cylinder 8, and the end part of a cylinder barrel of the supporting hydraulic cylinder 8 is connected with the top of the working cabin row 1; the end of the piston rod supporting the hydraulic cylinder 8 is connected to the lower part of the isolation door 5. Support pneumatic cylinder 8 can not only play the effect of the action of drive division door 5, and when out of work, support pneumatic cylinder 8 and close division door 5 and push up tight cabin 1 moreover, has further played the effect of supporting cabin 1, has strengthened moreover division door 5's compressive capacity. In a specific implementation, two support hydraulic cylinders 8 may be provided, as shown in fig. 5. The isolation door 5 can also be an up-down turnover door body connected through hinges.
Further, as a specific embodiment of the lattice knife type ejector head according to the present invention, as shown in fig. 1, the outer diameter of the rear end of the operating cabin 1 is reduced to form a first overlapping portion 9 whose outer wall is cylindrical, the inner diameter of the front end of the operating cabin 2 is increased to form a second overlapping portion 10 whose inner wall is cylindrical, the first overlapping portion 9 is inserted into the second overlapping portion 10, and the axial length of the first overlapping portion 9 is greater than the axial length of the second overlapping portion 10; the cylinder barrel end of the hydraulic cylinder component 7 is hinged with the inner wall of the operation cabin 2, and the piston rod end of the hydraulic cylinder component 7 is hinged with the rear end of the first lap joint part 9. The reason that the axial length of the first overlapping part 9 is greater than that of the second overlapping part 10 is to ensure that after the first overlapping part 9 is inserted into the second overlapping part 10, a gap is left between the front end of the first overlapping part 9 and the front end of the second overlapping part 10, and when the hydraulic cylinder assembly 7 is subjected to angle fine adjustment, a certain moving space is reserved. The two ends of the hydraulic cylinder assembly 7 are respectively hinged with the first lap joint part 9 and the operation cabin 2, so that the angle fine adjustment is convenient. In a specific implementation, the axial length of the first bridging part 9 is about 30cm longer than that of the second bridging part 10, and the outer diameter of the first bridging part 9 is 3-4cm shorter than that of the second bridging part 10.
Further, as a specific embodiment of the grid knife type pipe jacking head of the present invention, the hydraulic cylinder assembly 7 is embedded in the inner wall of the operation cabin 2, which is equivalent to the inner wall of the operation cabin 2 close to the second overlapping part 10 having a notch, and the notch is used for exactly placing the corresponding hydraulic cylinder assembly 7, so that the end of the piston rod of the hydraulic cylinder assembly 7 is exactly connected with the end face of the rear end of the first overlapping part 9, and the end part of the notch connected with the hydraulic cylinder assembly 7 can also play a better supporting role for the hydraulic cylinder assembly 7. A thickened connecting plate is additionally arranged at the position, connected with the piston rod end of the adjusting hydraulic cylinder, of the first lap joint part 9, and a reinforcing rib plate 14 is supported between the thickened connecting plate and the partition supporting wall 4; and a reinforcing rib plate 14 connected with the inner wall of the operation cabin 2 is additionally arranged at the position of the operation cabin 2 connected with the cylinder end of the adjusting hydraulic cylinder. The reinforcing ribs 14 provide reinforcement and at the same time make the structure more rational. As shown in fig. 1, 3, 4 and 5.
Further, as a specific embodiment of the gridline type ejector head according to the present invention, as shown in fig. 1 and 5, a direction adjustment control valve 11 is connected to the hydraulic cylinder assembly 7, and the direction adjustment control valve 11 is disposed inside the operating cabin 2. The hydraulic cylinder assembly 7 is controlled to extend or contract through the direction adjusting control valve 11, so that the function of fine adjustment of the direction of the machine head is achieved. The operator can stand in the operator cabin 2 to adjust the hydraulic cylinder assembly 7.
Further, as a specific embodiment of the grid knife type ejector head of the present invention, the hydraulic cylinder assembly 7 includes at least four sets of adjusting hydraulic cylinders whose traveling directions are parallel to the axial direction of the head, and all the adjusting hydraulic cylinders are uniformly distributed along the inner periphery of the operation cabin 2. Can set up four sets or eight sets of adjusting hydraulic cylinders in the concrete operation, guarantee that the aircraft nose can be about from top to bottom different angles finely tune, set up eight sets of adjusting hydraulic cylinders and can make the angle of rectifying the jacking deviation more accurate.
Further, as a specific implementation manner of the grid knife type pipe jacking machine head of the present invention, the grid knife disc 3 is integrally formed with the front end of the working cabin 1, the grid knife disc 3 is a soil cutting grid, and is a grid cutting knife formed by welding an outer ring 12 and criss-cross partition plates 13 arranged in the outer ring 12, specifically as shown in fig. 2, in the specific implementation, the grid of the grid cutting knife is 47mm by 47mm, the plane where the partition plates 13 are located is parallel to the axis of the machine head, the thickness of the front end of the outer ring 12 of the grid knife disc 3 is equal to or close to that of the partition plates 13, the outer wall of the grid knife disc 3 is cylindrical, and the inner wall of the grid knife disc 3 is frustum-shaped (horn-shaped). The plane of baffle 13 place is parallel with the aircraft nose axis in order to guarantee that baffle 13 is perpendicular all the time with the face of advancing in top, thereby the thickness of the outer lane 12 edge of net blade disc 3 equals or is close with baffle 13 thickness and guaranteed that the one end that net blade disc 3 cut soil can insert smoothly in soil (eat soil promptly), the outer wall of whole net blade disc 3 is cylindrical, the inner wall of net blade disc 3 is frustum shape (tubaeform), the outer wall of net blade disc 3 is from the front end to the rear end thicker and thicker like this, the stability of structure has been guaranteed with the one end of cabin 1 integrated into one piece to net blade disc 3.
Further, as a specific embodiment of the lattice knife type ejector head according to the present invention, as shown in fig. 5, an isolation barrier 6 is provided on an inner wall of the first overlapping portion 9 near the rear end thereof; and the height of the isolation barrier 6 is one third of the inner diameter of the working chamber 1. This is in order to guarantee to leave enough big distance between barrier 6 and the insulated door 5 and guarantee that the staff can pass insulated door 5 smoothly, and specifically, the height of insulated door 5 is a meter, sets barrier 6 highly to be one third of the internal diameter of cabin 1 and can guarantee the water retaining effect and also can guarantee that the staff of being convenient for turns over when can guarantee the manger plate effect.
Further, as an embodiment of the grid knife type pipe jacking machine head of the invention, as shown in fig. 1, the bottom of the isolation door 5 is flush with the bottom of the working chamber 1. This is for the convenience of the mud-water mixture or large diameter gravel etc. being able to be removed smoothly from the front compartment of the working compartment 1.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The grid knife type pipe jacking machine head is characterized by comprising a working cabin (1) and an operating cabin (2), wherein a grid cutter head (3) used for cutting soil is arranged at the front end of the working cabin (1), a partition supporting wall (4) is arranged in the rear half part of the working cabin (1), an isolation door (5) is arranged at the lower part of the partition supporting wall (4), an isolation baffle (6) for preventing water or silt from entering the operating cabin (2) is arranged at the bottom in the working cabin (1) behind the partition supporting wall (4), and the isolation door (5) can be penetrated through the axial distance between the isolation baffle (6) and the partition supporting wall (4) and the isolation baffle (6) after the isolation baffle (6) is crossed by a guarantee person with relative height; the working cabin (1) is connected with the operating cabin (2) through a hydraulic cylinder assembly (7) for correcting deviation of jacking.
2. The grid knife type pipe jacking machine head as claimed in claim 1, wherein the isolation door (5) is of an up-and-down push-pull type, the isolation door (5) is driven by at least one support hydraulic cylinder (8) which travels up and down, and the end part of a cylinder barrel of the support hydraulic cylinder (8) is connected with the top of the working cabin (1); the end of the piston rod of the supporting hydraulic cylinder (8) is connected with the lower part of the isolating door (5).
3. The lattice knife type ejector head according to claim 1 or 2, wherein the rear end outer diameter of the operating cabin (1) is reduced to form a first overlapping portion (9) whose outer wall is cylindrical, the front end inner diameter of the operating cabin (2) is increased to form a second overlapping portion (10) whose inner wall is cylindrical, the first overlapping portion (9) is inserted into the second overlapping portion (10) and the axial length of the first overlapping portion (9) is greater than that of the second overlapping portion (10); the cylinder end of the hydraulic cylinder assembly (7) is hinged with the inner wall of the operation cabin (2), and the piston rod end of the hydraulic cylinder assembly (7) is hinged with the rear end of the first lap joint part (9).
4. Lattice knife pipe jacking head according to claim 3, characterized in that the hydraulic cylinder assembly (7) is embedded on the inner wall of the operating cabin (2).
5. Lattice-cutter pipe-jacking head according to claim 4, characterized in that a direction-regulating control valve (11) is connected to the hydraulic cylinder assembly (7), said direction-regulating control valve (11) being arranged inside the operating cabin (2).
6. The lattice-knife pipe-jacking machine head as claimed in claim 5, wherein the hydraulic cylinder assembly (7) comprises at least four sets of adjusting hydraulic cylinders running in parallel with the machine head axial direction, all of which are uniformly distributed along the inner circumference of the operating cabin (2).
7. The lattice knife type pipe jacking machine head as claimed in claim 4, 5 and 6, wherein the lattice knife disc (3) is integrally formed with the front end of the working cabin (1), the lattice knife disc (3) is a soil cutting barrier, and is a lattice cutting knife formed by welding an outer ring (12) and criss-cross partition plates (13) arranged in the outer ring (12), and the plane of the partition plates (13) is parallel to the axis of the machine head.
8. The lattice knife type pipe jacking machine head as claimed in claim 7, wherein the thickness of the front end of the outer ring (12) of the lattice knife disc (3) is equal to or similar to the thickness of the partition plate (13), the outer wall of the lattice knife disc (3) is cylindrical and the inner wall is frustum-shaped.
9. The lattice-knife type pipe jacking head as claimed in claim 8, wherein a separation baffle (6) is provided on an inner wall of the first overlapping portion (9) near a rear end thereof.
10. Grid knife ejector head according to claim 9, characterized in that the bottom of the isolation door (5) is flush with the bottom of the working chamber (1) when the isolation door (5) is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010271581.8A CN111472800A (en) | 2020-04-09 | 2020-04-09 | Grid knife type pipe jacking machine head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010271581.8A CN111472800A (en) | 2020-04-09 | 2020-04-09 | Grid knife type pipe jacking machine head |
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| Publication Number | Publication Date |
|---|---|
| CN111472800A true CN111472800A (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010271581.8A Pending CN111472800A (en) | 2020-04-09 | 2020-04-09 | Grid knife type pipe jacking machine head |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685198A (en) * | 2021-09-03 | 2021-11-23 | 重庆新洲建筑工程有限公司 | Pipe jacking construction device and construction process |
-
2020
- 2020-04-09 CN CN202010271581.8A patent/CN111472800A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685198A (en) * | 2021-09-03 | 2021-11-23 | 重庆新洲建筑工程有限公司 | Pipe jacking construction device and construction process |
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