RU2815398C1 - Trencher with downhole pneumatic hammers for wall in soil and method of its application - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: group of inventions relates to machine equipment for construction of foundations, namely to trencher with downhole pneumatic hammers for wall in soil. Trencher with downhole pneumatic hammers for wall in soil comprises a crane, a guide frame, a push-pull device, prefabricated downhole pneumatic hammers, gas-collecting casings, pipe for high-pressure medium or cable and pipe for removal of pulp. At the same time the crane suspends the guide frame; the assembled downhole pneumatic hammers are connected to the lower part of the guide frame by means of a push-pull device. Prefabricated downhole pneumatic hammers are rectangular and are in a separate assembly. Each assembled downhole pneumatic hammer contains a primary hammer and secondary hammers. Plurality of secondary strikers are located on each primary striker, note here that secondary hammers represent downhole pneumatic hammers driven by high-pressure medium or electrically. Lower part of each primary striker is equipped with one gas-collecting casing. Pipe for high pressure medium or cable passes through the guide frame, entering the distribution pipeline of the primary striker, to actuate secondary hammers for percussion drilling. Mortar ducts are formed in each primary striker. Pulp discharge tube passes through guide frame and communicates with gas-collecting casings. Outlet hole is made in the middle-upper parts of the secondary strikers and is located above the lower hole of each gas-collecting casing. Secondary strikers comprise first secondary strikers and second secondary strikers. First secondary strikers are located on outer sides and adjacent sides of primary strikers and are rectangular and located close to each other. Each gas-collecting casing has a skirt structure.

EFFECT: increased safety of engineering structure of wall in soil due to high efficiency of construction in hard rocks, wear-resistant drilling tools, ease of maintenance, low cost, simple design and large width of the trench.

4 cl, 1 tbl, 3 dwg

Description

Field of invention

[0001] The present invention relates to the technical field of foundation construction machinery, and more particularly relates to a DTH wall trencher. The present invention also discloses a method of using a down-the-hole trencher for a wall in the ground.

BACKGROUND OF THE INVENTION

[0002] The existing rock wall trencher is mainly a hydraulic driven trench cutter, which is bulky and complex to equip, difficult to manufacture, high production costs, rapid equipment wear during construction, high construction costs maintenance, low efficiency of drilling rock and high energy consumption and cannot be used for construction in hard rock, while the maximum thickness of the constructed wall is limited.

[0003] Therefore, there is an urgent need to develop a down-the-hole hammer trencher for soil wall having simple equipment, low production cost, low energy consumption during use, high hard rock drilling efficiency, wear-resistant drilling tools, easy maintenance, low cost , simplicity of design and greater wall thickness.

[0004] The closest analogue of the invention is the technical solution according to CN110886579A. This document discloses a down-the-hole drilling tool for a continuous wall in the ground, comprising a connecting base, two expanding frames, an expanding hydraulic cylinder, two connecting rods, several impact devices located in the expanding frames, pin shafts and damping pads of the impact devices. Two oscillating rods are hingedly mounted on the lower end of the connecting base, while an expanding hydraulic cylinder is fixedly mounted in the internal cavity. At one end, two connecting rods are installed on the lower ends of the expanding hydraulic cylinder, and at the other end, they are fixed to the bases of the eyes of the two expanding frames, respectively. The expanding hydraulic cylinder reciprocates, thereby causing outward expansion and inward contraction of the two connecting rods and two expansion frames. Impact devices are located in all mounting through holes of the internal cavities of the bodies of the expanding frames and are placed in a row in the direction from front to back, the drilling tool provides pulsed vibration of the formation, impact crushing and drilling through the rock, while a rectangular groove is formed in a continuous wall in the ground.

The essence of the invention

[0005] The first object of the present invention is to provide a down-the-hole hammer trencher for a soil wall, characterized by simple equipment, low manufacturing cost, low energy consumption during use, high hard rock drilling efficiency, wear-resistant drilling tools, easy maintenance, low cost , simple design and greater wall thickness; and the disadvantages associated with high production costs, difficult maintenance, high cost, low hard rock drilling efficiency and low wall thickness caused by the use of the prior art trench cutter are overcome.

[0006] A second object of the present invention is to provide a method for using a down-the-hole trencher for a wall in the ground. Construction efficiency is high.

[0007] To achieve the above-mentioned first object of the present invention, the technical solution of the present invention is as follows: a down-the-hole hammer trencher for a wall in the ground is provided, comprising a crane, a guide frame, a push-pull device, down-the-hole hammer assemblies, gas collection casings, a high-pressure medium pipe pressure or cable and pipe for pulp removal; in this case, the crane suspends the guide frame;

[0008] the down-the-hole hammer assemblies are connected to the bottom of the guide frame through a push-pull device;

[0009] the prefabricated down-the-hole hammers are rectangular and are in a separate arrangement; each assembled down-the-hole hammer contains a primary hammer and secondary hammers; and a plurality of secondary hammers are located on each primary hammer, the secondary hammers being high-pressure or electrically driven down-the-hole hammers;

[0010] the lower part of each primary striker is provided with one gas collection casing;

[0011] a high-pressure fluid pipe or cable passes through the guide frame and push-pull device into the distribution pipeline of the primary hammer to drive the secondary hammers to perform percussion drilling;

[0012] solution pipelines are formed in each primary impactor; And

[0013] the slurry drain pipe passes through the guide frame and communicates with the gas collection casings.

[0014] In the specified technical solution, the outlet hole is made in the middle-upper parts of the secondary strikers;

[0015] the outlet is located above the bottom opening of each gas collection casing.

[0016] In the above technical solution, the secondary impactors include first secondary impactors and second secondary impactors; And

[0017] the first secondary impactors are located on the outer sides and adjacent sides of the primary impactors; and the first secondary impactors are rectangular and located close to each other.

[0018] In the above technical solution, each gas collection casing has a skirt structure.

[0019] In the specified technical solution, prefabricated down-the-hole hammers are movably connected to the guide frame by means of a push-pull device.

[0020] In order to achieve the above-mentioned second object of the present invention, the technical solution of the present invention is as follows: a method of using a down-the-hole trencher for a wall in the ground is provided, including the steps of:

[0021] stage 1: installation;

[0022] connecting the crane to the guide frame;

[0023] connecting the down-the-hole hammer assembly to the bottom of the guide frame by means of a push-pull device;

[0024] allowing the high pressure fluid pipe or cable to pass through the guide frame and the push-pull device to introduce the primary impactor into the distribution pipeline; And

[0025] providing passage of the slurry drain pipe through the guide frame and communication with the gas collection casings;

[0026] stage 2: hoisting operations;

[0027] suspending the guide frame from the operating point with a crane; And

[0028] stage 3: digging a trench with a DTH hammer for a wall in the ground;

[0029] activating the secondary hammers to perform percussion drilling after the high pressure fluid pipe or cable enters the distribution pipeline of the primary hammer;

[0030] pushing and pulling the primary hammers with a push-pull device so that the primary hammers are constantly and symmetrically spaced or close to each other, to achieve full-section drilling of rock with down-the-hole hammers; And

[0031] mixing the exhaust gas from the down-the-hole hammers with the solution in gas collection casings, discharging the mixture into a slurry pipe through solution lines in the middle parts of the primary hammers under the action of solution pressure to form an airlift reverse circulation to remove slag, and discharging the mixture upward into a surface solution processing system through a pipe for pulp removal; wherein

[0032] When constructing a waterless dry well, waste slag blowing or slag removal with reverse air circulation is carried out in the lower parts of the secondary impactors.

[0033] In the above technical solution, a plurality of secondary impactors are provided; And

[0034] Impact drilling is performed randomly by a plurality of secondary impactors.

[0035] The present invention has the following advantages:

[0036] (1) The DTH wall trencher is easy to equip, suitable crane and air compressor are universal equipment, does not require special design and production, and thus the production cost is much lower than that of trench cutter, and the DTH wall trencher has wear-resistant drilling tools, easy maintenance, low cost, high construction efficiency in hard rock and low energy consumption;

[0037] (2) The subsurface wall trencher has a simple structure and a larger trench width than the subsurface wall trench cutter, thereby improving the safety of the subsurface wall engineering structure, saving a large amount of steel beam materials and greatly reducing costs for engineering and technical support; And

[0038] (3) The suitable faucet and air compressor according to the present invention are versatile equipment that can be used in other fields of technology, increasing the utilization rate of the equipment.

[0039] The underground wall trencher is easy to equip, the matching crane and air compressor are both universal equipment and no special production is required, and thus the production cost is much lower than that of the underground wall trencher, and the down-the-hole hammer trencher for soil wall is characterized by high construction efficiency in hard rock, wear-resistant drilling tools, easy maintenance, low cost, low energy consumption during construction and large trench width compared with trench cutter, thereby improving the safety of engineering soil wall structures, saving a large amount of steel beam materials and achieving a high equipment utilization rate.

Brief description of graphic materials

[0040] In FIG. 1 shows a block diagram of a trencher with down-the-hole hammers for a wall in the ground according to the present invention.

[0041] In FIG. 2 is a bottom view of two down-the-hole hammer assemblies according to the present invention.

[0042] In FIG. 3 shows a block diagram of a prefabricated down-the-hole hammer, a gas collection casing and a solution pipeline according to the present invention.

[0043] On the graphic materials: 1 - crane, 2 - guide frame, 3 - push-pull device, 4 - assembled down-the-hole hammer, 4.1 - primary hammer, 4.21 - first secondary hammer, 4.22 - second secondary hammer, 4.2 - secondary hammer , 5 - gas collection casing, 6 - pipe for high pressure media or cable, 7 - pipe for pulp removal and 8 - solution pipeline.

[0044] In FIG. 2, the DTH hammer assemblies 4 are located at intervals, with the first secondary hammers 4.21 located on the sides of two adjacent DTH hammer assemblies 4 being rectangular and located close to each other.

Detailed Description of Embodiments

[0045] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but they should not be construed as limiting the present invention and are presented by way of example only. At the same time, the advantages of the present invention will become clearer and more understandable through illustration.

[0046] In the graphic materials it can be seen that a trencher with down-the-hole hammers for a wall in the ground contains a crane 1, a guide frame 2, a push-pull device 3, prefabricated down-the-hole hammers 4, gas collection casings 5, a pipe for a high-pressure environment or cable 6 and pipe 7 for pulp removal; in this case, the crane 1 suspends the guide frame 2;

[0047] the down-the-hole hammer assemblies 4 are connected to the bottom of the guide frame 2 by means of a push-pull device 3;

[0048] the prefabricated down-the-hole hammers 4 are rectangular; prefabricated down-the-hole hammers 4 are in a separate arrangement; each prefabricated down-the-hole hammer 4 contains a primary hammer 4.1 and secondary hammers 4.2; and a plurality of secondary hammers 4.2 are located on each primary hammer 4.1, the secondary hammers 4.2 being high-pressure or electrically driven DTH hammers (as shown in FIGS. 1 and 2); Impact drilling is carried out by secondary impactors randomly and asynchronously, which reduces the impact force on the trench excavations and prevents the collapse of the excavation from excessive vibration force; the primary impactors are pushed and pulled by the push-pull device so that they are constantly and symmetrically separated or close to each other in the transverse direction to achieve full-section trench drilling;

[0049] the lower part of each primary striker 4.1 is provided with one gas collection casing 5;

[0050] a high-pressure fluid pipe or cable 6 passes through the guide frame 2 and the push-pull device 3, entering the primary hammer distribution pipeline to drive the secondary hammers 4.2 to perform percussion drilling;

[0051] in each primary impactor 4.1, solution lines 8 are formed (as shown in Figs. 1 and 3); the exhaust gas is released from the middle-upper parts of the down-the-hole hammers and mixed with the solution inside the gas collection casings, and under the action of the pressure of the solution, an air-lift reverse circulation is created to remove slag, and the mixture is released into the pipe 7 for removing the pulp through the solution lines 8 in the middle parts of the primary hammers 4.1 and through pipe 7 for draining the pulp, it is released upward into the above-ground solution treatment system; and the gas collection casings 5 are of sufficient height to ensure that the exhaust gases are not released into the trenches beyond the DTH hammers 4 and the gas collection casings 5; And

[0052] the slurry drain pipe 7 passes through the guide frame 2 and communicates with the gas collection casings 5 (as shown in Fig. 1); and a slurry discharge pipe passes through a push-pull device and a guide frame to discharge the mixture into the above-ground slurry treatment system.

[0053] In addition, an outlet hole is provided in the middle-upper portions of the secondary strikers 4.2; And

[0054] the outlet is located above the bottom hole of each gas collection casing 5; The secondary hammers 4.2 are provided with an outlet in the middle-upper parts without a vent in the lower parts, the outlet is located above the bottom opening of each gas collection casing 5, and the gas collection casings 5 are of sufficient height to ensure that the exhaust gas is not released into the trench openings beyond DTH hammers 4 to avoid collapse of excavations caused by gas leakage into the solution in trench excavations.

[0055] In addition, secondary impactors 4.2 include first secondary impactors 4.21 and second secondary impactors 4.22;

[0056] the first secondary impactors 4.21 are located on the outer sides of the primary impactors 4.1 and on adjacent sides of the two primary impactors 4.1; the first secondary strikers 4.21 are rectangular and located close to each other; and drilling of rock with a full-width trench is achieved; And

[0057] The second secondary strikers 4.22 are rounded, and a plurality of second strikers 4.22 are arranged in a staggered pattern (as shown in FIG. 2).

[0058] In addition, each gas collection casing 5 has a skirt structure (as shown in FIGS. 1 and 3).

[0059] In addition, the down-the-hole hammer assembly 4 is movably connected to the guide frame 2 by means of a push-pull device 3 (as shown in FIG. 1); and during construction, the push-pull device 3 pushes and pulls the primary hammers 4.1 so that the primary hammers 4.1 are constantly and symmetrically spaced or located close to each other to achieve full-section drilling of rock with down-the-hole hammers.

[0060] The push-pull device 3 described in FIG. 1 is provided as an example only and may have other designs with the same function.

[0061] With reference to the graphic materials, it can be seen that the method of using a down-the-hole trencher for a wall in the ground includes the following steps:

[0062] stage 1: installation;

[0063] connecting the tap 1 to the guide frame 2;

[0064] connecting two assembled down-the-hole hammers 4 to the bottom of the guide frame 2 by means of a push-pull device 3; in this case, other numbers of prefabricated down-the-hole hammers 4 can also be selected as desired;

[0065] allowing the high-pressure fluid pipe or cable 6 to pass through the guide frame 2 and the push-pull device 3 to introduce the primary striker into the distribution pipeline; And

[0066] ensuring that the pipe 7 for removing the pulp passes through the guide frame 2 and communicates with the gas collection casings 5;

[0067] stage 2: hoisting operations;

[0068] hanging the guide frame 2 by crane 1 to the operating point; And

[0069] stage 3: digging a trench with a DTH hammer for a wall in the ground;

[0070] activating the secondary hammers 4.2 to perform percussion drilling after the high pressure fluid pipe or cable 6 enters the distribution pipeline of the primary hammer;

[0071] pushing and pulling the primary hammers 4.1 by the push-pull device 3 so that the primary hammers 4.1 are constantly and symmetrically spaced or close to each other, to achieve full-section drilling of rock with down-the-hole hammers; And

[0072] mixing exhaust gas from submersible hammers with solution in gas collection casings, releasing the mixture into pipe 7 to remove the pulp through solution lines 8 in the middle parts of the primary impactors 4.1 under the action of solution pressure with the formation of airlift reverse circulation to remove slag and releasing the mixture upward into the ground a system for processing the solution through a pipe 7 for removing pulp (as shown in Fig. 1, 2 and 3); in this case, the gas collection casings 5 have a sufficient height to ensure that the exhaust gas is not released into the trenches beyond the DTH hammers 4 and gas collection casings 5;

[0073] When constructing a waterless dry well, waste slag blowing or slag removal with reverse air circulation is carried out in the lower parts of the secondary impactors.

[0074] In addition, a plurality of secondary impactors 4.2 are provided; and a variety of 4.1 primary strikers are provided; And

[0075] Impact drilling is performed randomly by a plurality of secondary impactors 4.2 (as shown in FIGS. 1 and 2), the secondary impactors 4.2 are down-the-hole hammers, and impact drilling is performed randomly and asynchronously by secondary impactors, which reduces the impact force on the trench excavations and prevents the collapse of the excavation caused by excessive vibration.

[0076] In order to be able to more clearly illustrate the advantages of the DTH wall trencher and the method of its application according to the present invention compared to the prior art, workers compared the two solutions, and the results of the comparison are presented in the following table:

[0077] From the above table, it can be seen that the submersible wall trencher and the method of its use according to the present invention have the advantages that the submersible wall trencher is simple and easy to equip, characterized by low production costs, low energy consumption during use, high drilling efficiency, easy maintenance, low cost, simple structure and greater wall thickness compared to the prior art.

[0078] Other parts not illustrated are prior art.

Claims (25)

1. A trencher with down-the-hole hammers for a wall in the ground, containing a crane (1), a guide frame (2), a push-pull device (3), prefabricated down-the-hole hammers (4), gas collection casings (5), a pipe for a high-pressure environment or cable (6) and pipe (7) for pulp removal; in this case, the crane (1) suspends the guide frame (2); prefabricated down-the-hole hammers (4) are connected to the lower part of the guide frame (2) by means of a push-pull device (3); prefabricated down-the-hole hammers (4) are rectangular and are located in a separate arrangement; each assembled down-the-hole hammer (4) contains a primary hammer (4.1) and secondary hammers (4.2); and a plurality of secondary hammers (4.2) are located on each primary hammer (4.1), the secondary hammers (4.2) being high pressure or electrically driven DTH hammers; the lower part of each primary striker (4.1) is equipped with one gas collection casing (5); a high-pressure fluid pipe or cable (6) passes through the guide frame (2), entering the primary hammer distribution pipe to drive the secondary hammers (4.2) to perform percussion drilling; in each primary impactor (4.1) solution pipelines (8) are formed; And the pipe (7) for removing the pulp passes through the guide frame (2) and communicates with the gas collection casings (5); the outlet hole is made in the middle-upper parts of the secondary strikers (4.2); and the outlet is located above the bottom hole of each gas collection casing (5); secondary impactors (4.2) contain first secondary impactors (4.21) and second secondary impactors (4.22); And first secondary impactors (4.21) are located on the outer sides and adjacent sides of the primary impactors (4.1); and the first secondary impactors (4.21) are rectangular and located close to each other; Each gas collection casing (5) has a skirt design. 2. The trencher according to claim 1, characterized in that the prefabricated down-the-hole hammers (4) are movably connected to the guide frame (2) by means of a push-pull device (3). 3. Method of using a trencher with submersible hammers for a wall in the ground according to any one of paragraphs. 1.2, including stages: stage 1: installation; connection of the crane (1) with the guide frame (2); connection of prefabricated down-the-hole hammers (4) with the lower part of the guide frame (2) by means of a push-pull device (3); ensuring the passage of a pipe for a high-pressure environment or cable (6) through the guide frame (2) and the push-pull device (3) with the introduction of a primary striker into the distribution pipeline; And ensuring the passage of a pipe (7) for removing pulp through the guide frame (2) and communication with gas collection casings (5); stage 2: hoisting operations; hanging the guide frame (2) by crane (1) to the operating point; And stage 3: digging a trench with a submersible hammer for a wall in the ground actuating the secondary hammers (4.2) to perform percussion drilling after the high pressure fluid pipe or cable (6) has entered the distribution pipeline of the primary hammer; pushing and pulling the primary hammers (4.1) by the push-pull device (3) so that the primary hammers (4.1) are constantly and symmetrically spaced or close to each other, to achieve full-section drilling of rock with down-the-hole hammers; And mixing exhaust gas from submersible hammers with solution in gas collection casings (5), discharging the mixture into a pipe (7) to remove the pulp through solution lines (8) in the middle parts of the primary impactors (4.1) under the action of solution pressure with the formation of air-lift reverse circulation to remove slag and discharging the mixture upward into the above-ground slurry treatment system through a slurry drain pipe (7). 4. The method according to claim 3, characterized in that a plurality of secondary impactors are provided (4.2); And Impact drilling is performed randomly through a plurality of secondary impactors (4.2).