A slag cleaning anti-locking system and slag cleaning method for rock pipe jacking machine

Abstract

An anti-locking system for a rock pipe jacking machine, the pipe jacking machine includes a tool pipe with a drill bit and a matching pipe connected to the tool pipe, the anti-locking system includes a slag plate provided on the tool pipe; the slag plate can prevent mud and / or stones from flowing along the outer wall of the tool pipe; a slag cleaning method for a rock pipe jacking machine includes tool pipe drill bit torque collection and slag cleaning with a slag plate; tool pipe drill bit torque collection, the tool pipe drives the drill bit to rotate, the torque collector collects the torque driving the drill bit in real time, when the torque drops by more than 2%, the pressurizing component is started to pressurize the nozzle or flushing pipe; slag cleaning with a slag plate, the nozzle or flushing pipe sprays water to the slag plate to make the mud and / or stones gathered outside the slag plate leave the slag plate. The advantage of the present invention is that it is particularly suitable for the construction of pipelines with a hole diameter of 80 cm to 200 cm, and can prevent mud from flowing along the tool pipe and locking the tool pipe.

Description

Technical Field

[0001] The present invention and an anti-lock braking system and a slag cleaning method for a pipe jacking machine particularly relate to an anti-lock braking system and a slag cleaning method for a rock pipe jacking machine. Background Art

[0002] In the long-distance casing jacking construction, the casing needs to be inspected after the prefabricated pipe is passed through. After the inspection and other processes are completed, the casing will be dragged back and threaded. In this process, the anti-corrosion layer on the outside of the casing is easily scratched and damaged by the weight of the casing, which can easily damage the parent material, making maintenance difficult during later operation and increasing safety. In serious cases, this casing cannot pass the supervision and inspection of special equipment and related inspection and supervision units, resulting in the failure of the line construction and irreversible losses. Therefore, the original construction process cannot meet the needs of long-distance and large-diameter casing construction. The casing must be safely protected during the threading process to ensure that the casing is not subjected to friction and other measures that may damage the casing. In the Fuyang Branch (Zhijiang Section) (S12 Relocation) Project of Hangzhou Natural Gas Utilization Project, the lengths of the 11 sections of jacking pipes are different, with the longest reaching 353 meters and the shortest 198 meters. Several sections need to pass through rock sections. When the tool pipe of the jacking equipment is pushed forward, debris and mud will flow to the bottom of the tool pipe through the gap of over-excavation, causing the tool pipe to be locked by mud and rock, and the resistance to jacking will be greatly increased. After the tool pipe is locked by the resistance, the cutter head will be stuck and cannot continue to jack. Summary of the invention

[0003] The invention and an anti-locking system and a slag clearing method for a rock pipe jacking machine are particularly suitable for the construction of pipelines with a hole diameter of 80 cm to 200 cm, and can prevent mud from flowing along the tool pipe and lock the tool pipe.

[0004] The technical solution for achieving the object of the present invention is a slag cleaning anti-locking system for a rock pipe jacking machine, wherein the pipe jacking machine comprises a tool pipe provided with a drill bit and a matching pipe connected to the tool pipe, and the anti-locking system comprises a slag blocking plate provided on the tool pipe;

[0005] The slag blocking plate can prevent mud and / or gravel from flowing along the outer wall of the tool pipe.

[0006] Furthermore, the slag blocking plate is arranged transversely along the tool tube wall.

[0007] Furthermore, the surface of the slag retaining plate is provided with protrusions.

[0008] Furthermore, the slag retaining plate is a plate with a cavity, and a nozzle is provided on the surface of the slag retaining plate, and the nozzle is connected to the cavity;

[0009] The water inlet pipe is connected to the cavity from the inside of the tool pipe and supplies water to the nozzle through the cavity.

[0010] Furthermore, a water flushing pipe is provided on the tool tube wall between the drill bit and the slag retaining plate, and the water flushing pipe flushes water toward the slag retaining plate.

[0011] Furthermore, the angle between the slag baffle and the tool tube wall is less than 90 degrees.

[0012] Furthermore, the nozzle or the flushing pipe is connected to the pressurizing component.

[0013] Furthermore, the slag retaining plate is connected to the tool pipe via a rotating component;

[0014] The slag retaining plate is rotatable relative to the tool tube.

[0015] A slag removal method for a rock pipe jacking machine includes tool pipe drill bit torque collection and slag removal with a slag baffle plate;

[0016] The tool tube drill bit torque collection, the tool tube drives the drill bit to rotate, and the torque collector collects the torque driving the drill bit in real time. When the torque drops by more than 2%, the pressurizing component is started to pressurize the sprinkler or flushing pipe;

[0017] The slag retaining plate is cleaned by spraying water from a nozzle or a water pipe to the slag retaining plate so that the mud and / or stones gathered outside the slag retaining plate leave the slag retaining plate.

[0018] Furthermore, in the tool tube drill bit torque collection step, every second or several seconds is a collection point, and a real-time torque value is collected at each collection point and recorded as XN. When calculating the torque value change at point XN, the torque values ​​from XN-60 to XN-1 are first accumulated to obtain the average value Y, and then the torque change value is calculated by ((Y-XN) / Y)*100%. When the torque change value is greater than 2%, the pressurizing component is started to pressurize the nozzle or flushing pipe.

[0019] The advantages of the present invention are as follows: 1) There is a drill bit excavation at the front end of the tool pipe, but in order to allow the subsequent pipeline to pass through, it will generally over-excavate by 5-20 cm. During the excavation process, a part of the mud at the front end of the drill bit enters the rear end of the tool pipe along the tool pipe wall and the over-excavation gap and accumulates at the rear end of the tool pipe. When such a situation exists in the soft soil layer, the tool pipe can be squeezed outward to change the soft soil layer so that the tool pipe passes through. However, in the case of rock formations, the drill bit has locked the back of the tool pipe with mud. The rock itself has a strong hardness and is not easy to deform. The tool pipe cannot be squeezed so that it cannot pass through the locking point. After such a situation occurs, it is generally necessary to use workers to enter from the already penetrated pipeline and open the tool pipe in the narrow space to operate or increase the thrust to pass through the locking point. If it cannot pass through the locking point, the tool pipe can only be scrapped and re-threaded. The advantage of the present invention is that the slag baffle prevents the mud from flowing along the outer wall of the tool pipe, thereby preventing and reducing the amount of mud entering the rear end of the tool pipe at the same time, thereby greatly reducing the mud from locking the tool pipe or preventing the mud from locking the tool pipe.

[0020] 2) The nozzle or the water flushing pipe flushes water toward the slag retaining plate, so that the slag at the slag retaining plate leaves the slag retaining plate and moves toward the drill bit, thereby achieving slag cleaning.

[0021] 3) When cleaning slag, the change of torque is collected to determine whether the slag baffle needs to be cleaned, which reduces the frequency of cleaning slag and improves the accuracy of cleaning slag, avoiding the increase of water content around the tool tube due to frequent water flushing and cleaning slag, thereby affecting the working state of the tool tube.

[0022] 4) The angle between the slag retaining plate and the tool tube wall is less than 90 degrees, so that the slag retaining plate is not perpendicular to the tool tube wall, thereby increasing the slag storage space of the slag retaining plate and minimizing the stones in the mud from passing over the slag retaining plate and entering the rear end of the tool tube.

[0023] 5) Compared with large shield machines, the present invention has a simple structure and can effectively solve the problems encountered during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention.

[0025] Figure 2 for Figure 1 Schematic diagram of the AA section.

[0026] Figure 3 Schematic diagram of providing protrusions on the surface of the slag retaining plate.

[0027] Figure 4 Schematic diagram of the structure of setting a nozzle for the slag retaining plate.

[0028] Figure 5 This is a schematic diagram of the structure of a flushing pipe on a tool pipe.

[0029] Figure 6 This is another schematic diagram of a preferred structure of the present invention.

[0030] Figure 7 Schematic diagram of the preferred embodiment of the slag baffle being connected to the tool tube.

[0031] As shown in the figure, the tool tube 1, the drill bit 2, the slag baffle 3, the protrusion 4, the cavity 5, the nozzle 6, the pressurizing component 7, the flushing pipe 8, the rotating component 9, the water inlet pipe 10, and the matching pipe 11. Specific implementation plan

[0032] like Figure 1 , 2 In the invention, an anti-lock braking system for a rock pipe jacking machine is provided, wherein the pipe jacking machine comprises a tool pipe 1 provided with a drill bit 2 and a matching pipe 11 connected to the tool pipe 1, and the anti-lock braking system comprises a slag retaining plate 3 provided on the tool pipe 1;

[0033] The slag retaining plate 3 can prevent mud and / or silt and / or gravel from flowing along the outer wall of the tool tube 1 and entering the rear end of the tool tube 1, thereby avoiding the accumulation of a large amount of silt and / or gravel at the rear end of the tool tube 1, causing the rear end of the tool tube 1 to be stuck in the rock. Preferably, the slag retaining plate 3 is arranged laterally along the wall of the tool tube 1, that is, the slag retaining plate 3 surrounds the tool tube 1.

[0034] like Figure 3 In the embodiment, the surface of the slag retaining plate 3 is provided with protrusions 4, which allow a gap between the stone and the surface of the slag retaining plate 3, thereby facilitating the use of water to remove the slag later. At the same time, the protrusions 4 can enhance the strength of the slag retaining plate 3.

[0035] like Figure 4 In the embodiment, the slag retaining plate 3 is a plate provided with a cavity 5, and a nozzle 6 is provided on the surface of the slag retaining plate 3, and the nozzle 6 is connected with the cavity 5;

[0036] The water inlet pipe 10 is connected to the cavity 5 from the inside of the tool tube 1 and supplies water to the nozzle 6 through the cavity 5. The water sprayed from the nozzle 6 is sprayed toward the slag retaining plate 3, so that the slag accumulated in front of the slag retaining plate 3 is blown away, and the slag moves along the tool tube 1 to the drill bit or leaves the slag retaining plate at a certain distance under the impact of water. Preferably, the nozzle 6 is connected to the pressurizing component 7, and the pressurizing component 7 is arranged in the working well and is connected to the nozzle 6 through the matching pipe 11 and the water inlet pipe 10 inside the tool tube 1.

[0037] like Figure 5In the tool tube 1, a water flushing pipe 8 is provided on the wall of the tool tube 1 between the drill bit 2 and the slag stop plate 3. The water flushing pipe 8 flushes water in the direction of the slag stop plate 3 to blow away the slag accumulated in front of the slag stop plate 3, and the slag moves along the tool tube 1 to the drill bit or leaves the slag stop plate for a certain distance under the impact of water, so that the slag accumulated on the slag stop plate 3 is reduced, and the slag stopping function of the slag stop plate 3 is reserved. The water pipe connected to the water flushing pipe 8 is arranged inside the tool tube 1.

[0038] like Figure 6 In the embodiment, the slag-blocking plate 3 is connected to the tool tube 1 through a rotating component 9, and the rotating component 9 is preferably a bearing, at least a part of which is embedded in the wall of the tool tube 1, and the slag-blocking plate 3 is fixed to the outer surface of the bearing;

[0039] When subjected to external force, the slag retaining plate 3 can rotate relative to the tool tube 1 . When the tool tube 1 is washed by mud and water during drilling or the impact of water is too large, the slag retaining plate 3 will rotate relative to the tool tube 1 to separate the accumulated slag from the slag retaining plate 3 .

[0040] like Figure 7 In the embodiment, the angle between the slag stop plate 3 and the wall of the tool tube 1 is less than 90 degrees, and the area of ​​the slag stop plate 3 projected onto the wall of the tool tube 1 is increased, thereby maximizing the volume of the space formed between the slag stop plate 3 and the tool tube 1. Considering the need for slag cleaning in the later stage, the slag stop plate 3 cannot be too close to the tool tube 1, and an angle for water flushing and cleaning slag needs to be left. The slag stop plate 3 can be a flat plate or a curved plate.

[0041] A slag removal method for a rock pipe jacking machine includes tool pipe drill bit torque collection and slag removal with a slag baffle plate;

[0042] The tool tube drill bit torque collection, the tool tube 1 drives the drill bit 2 to rotate, the torque collector collects the torque driving the drill bit in real time, when the torque drops by more than 2%, the pressurizing component 7 is started to pressurize the nozzle 6 or the flushing pipe 8, in the tool tube drill bit torque collection step, every second or several seconds is a collection point, each collection point collects a real-time value of the torque and records it as XN, when calculating the torque value change of the torque point XN, first add the torque from XN-60 to XN-1 and calculate the average value Y (equivalent to the average value collection of the first 59 collection points), and then calculate the torque change value by ((Y-XN) / Y)*100%, when the torque change value is less than 2% (that is, when the XN value is less than the Y value and the deduction exceeds 2% of Y), the pressurizing component is started to pressurize the nozzle or flushing pipe, the water pressure sprayed by the nozzle or flushing pipe is high, and the slag cleaning can be better achieved;

[0043] The slag retaining plate is used to clean slag, and the nozzle 6 or the flushing pipe 7 sprays water to the slag retaining plate 3 to make the mud and / or gravel gathered outside the slag retaining plate leave the slag retaining plate 3. Part of the mud and / or gravel moves along the wall surface of the tool tube 1 to the drill bit 2, and part of it only stays a certain distance away from the slag retaining plate 3. No matter entering the drill bit or leaving a certain distance, space is reserved for the slag retaining plate 3 to play the role of slag retaining.

Claims

1. A slag cleaning anti-locking system for a rock pipe jacking machine, the pipe jacking machine comprising a tool pipe with a drill bit and a matching pipe connected to the tool pipe, characterized in that : The anti-lock braking system includes a slag stop plate provided on the tool tube; the slag stop plate can prevent mud and / or stones from flowing along the outer wall of the tool tube; the slag stop plate is arranged transversely along the tool tube wall; a protrusion is provided on the surface of the slag stop plate; the slag stop plate is a plate provided with a cavity, a nozzle is provided on the surface of the slag stop plate, and the nozzle is connected with the cavity; a water inlet pipe is connected to the cavity from the inside of the tool tube and supplies water to the nozzle through the cavity; a flushing pipe is provided on the tool tube wall between the drill bit and the slag stop plate, and the flushing pipe flushes water in the direction of the slag stop plate; the slag stop plate is connected to the tool tube through a rotating component; the slag stop plate can rotate relative to the tool tube; The anti-lock system is used for the anti-lock slag cleaning method of the rock jacking machine, including tool tube drill bit torque collection and slag baffle plate slag cleaning; the tool tube drill bit torque collection, the tool tube drives the drill bit to rotate, the torque collector collects the torque driving the drill bit in real time, and when the torque drops by more than 2%, the pressurizing component is started to pressurize the nozzle or flushing pipe; The slag retaining plate is cleaned by spraying water from a nozzle or a water pipe to the slag retaining plate so that the mud and / or stones gathered outside the slag retaining plate leave the slag retaining plate; In the tool tube drill bit torque collection step, one second or several seconds is a collection point, and a real-time torque value is collected at each collection point and recorded as XN. When calculating the torque value change of the torque point XN, the torque values ​​from XN-60 to XN-1 are first accumulated to obtain the average value Y, and then the torque change value is calculated by ((Y-XN) / Y)*100%. When the torque change value is greater than 2%, the pressurizing component is started to pressurize the nozzle or flushing pipe.

2. The anti-lock braking system for slag removal of a rock pipe jacking machine according to claim 1, characterized in that : The angle between the slag baffle and the tool tube wall is less than 90 degrees.

3. The anti-lock braking system for slag cleaning of a rock pipe jacking machine according to claim 1 is characterized by: The spray head or the flushing pipe is connected to the pressurizing component.

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