A type of TRD construction stratum excavation equipment

Abstract

This application relates to the field of TRD (Tracking and Demolition) excavation equipment technology, and discloses a TRD excavation equipment for strata excavation, including a drive unit. Several cutting boxes are arranged below the drive unit. A chain connects the drive wheel at the bottom of the cutting box to a drive wheel located inside the drive unit. Several equally spaced cutters are fixedly mounted on the chain. Several longitudinally equally spaced pneumatic grooves are respectively opened on both sides of the cutting box. A sliding block is movably fitted inside the pneumatic groove. One end of the sliding block extends outward from the outside of the cutting box and is fixedly connected to a support block. By pressurizing the pneumatic grooves with air, the support block supports the rotating chain, allowing the cutters on the chain to perform excavation operations. When encountering hard rocks during lateral excavation, the air in the pneumatic grooves can be further compressed to prevent hard contact between the hard rocks and the cutters, thus avoiding damage to the cutters and improving their service life.

Description

Technical Field

[0001] This application relates to the field of TRD construction excavation equipment technology, and more particularly to a TRD construction stratum excavation equipment. Background Technology

[0002] TRD construction stratum excavation equipment is a special machine used for building underground continuous walls. It uses a chainsaw-type cutter box to penetrate deep into the stratum for cutting and mixing operations. It is mainly composed of a frame, a walking chassis, a cutting box, a drive unit, and a cutter chain. It is connected by multiple cutting boxes. During operation, the cutting box is vertically inserted into the bottom layer. Through horizontal movement and the operation of the chain, the soil is cut and mixed.

[0003] However, due to the presence of hard rocks deep within the soil, existing TRD construction excavation equipment uses the cutting box to directly support the chain on both sides during horizontal excavation. If hard rocks are encountered, the TRD construction excavation equipment cannot perform horizontal excavation and needs to break the hard rocks, resulting in low construction efficiency. Furthermore, the continuous hard contact between the chain cutter and the hard rocks due to the obstruction of the hard rocks can easily damage the chain cutter. Summary of the Invention

[0004] This application proposes a TRD (Tracking and Drilling) excavation equipment for soil strata, which has the advantages of being effective in dealing with hard rocks in the soil and not easily damaging the chain cutters. This solves the problems of low operating efficiency and easy damage to chain cutters in existing TRD excavation equipment when encountering hard rocks deep in the soil.

[0005] To achieve the above objectives, this application adopts the following technical solution: a TRD construction stratum excavation device, including a drive unit, a plurality of cutting boxes arranged below the drive unit, grouting guide grooves for grouting are opened on the cutting boxes, driven units are fixedly installed inside the drive unit and at the bottom of the cutting boxes respectively, a chain is connected between the driven unit at the bottom of the cutting box and the driven unit arranged inside the drive unit, a plurality of equally spaced cutters are fixedly installed on the chain, a plurality of longitudinally equally spaced pneumatic grooves are opened on both sides of the cutting box, the pneumatic grooves on a cutting box are connected to each other through air guide grooves, and the pneumatic grooves between two cut boxes after splicing are connected, a sliding block is movably fitted inside the pneumatic groove, one end of the sliding block extends out of the outside of the cutting box and is fixedly connected to a support block.

[0006] During excavation, the gas pressure in the pneumatic groove supports the chain by the support block, and the support block pushes the sliding block to move and compress the pneumatic groove, so that the cutter passes through hard rocks. Based on the change in gas pressure in the pneumatic groove, it is determined whether hard rocks that the cutter cannot break are encountered during lateral excavation.

[0007] Furthermore, the two adjacent support blocks on the outside of the cutting box are movably fitted together so that the support blocks can effectively support the chain, allowing the cutter on the chain to excavate the soil when the chain is running. The top and bottom of the support blocks are provided with smooth chamfers so that the two adjacent support blocks can move into a fitted state when they move relative to each other.

[0008] Furthermore, a limiting frame plate is fixedly installed on the outside of the cutting box to limit the sliding block. The limiting frame plate is fixed to the cutting box by bolts and is fixedly set on the outside of the pneumatic groove. When air is injected into the pneumatic groove for pressurization, it prevents the sliding block from moving and separating from the pneumatic groove. The detachable design of the limiting frame plate allows for the early installation of the sliding block into the pneumatic groove.

[0009] Furthermore, a rectangular frame scraper is fixedly installed on the inner side of the limiting frame plate. One side of the rectangular frame scraper extends out of the limiting frame plate, and the inner side of the rectangular frame scraper is in movable contact with the outer side of the sliding block. When the sliding block moves relative to the cutting box, the limiting frame plate and the rectangular frame scraper, the rectangular frame scraper is used to clean the surface of the sliding block, preventing the mud attached to the sliding block when it is outside the cutting box from entering the pneumatic groove.

[0010] Furthermore, the sliding block is internally fixed with a rectangular frame sealing ring that movably seals with the inner wall of the pneumatic groove. The rectangular frame sealing ring fits against the inner wall of the pneumatic groove to form a seal, thus isolating the inside of the pneumatic groove from the outside and preventing slurry from seeping into the pneumatic groove during excavation operations.

[0011] Furthermore, the top of the drive unit is provided with a first protrusion, and the inner side of the first protrusion is provided with an air inlet groove that communicates with the uppermost pneumatic groove of the cutting box. The bottom of the drive unit is provided with a first groove that matches the first protrusion, and the interior of the first groove communicates with the lowermost pneumatic groove of the cutting box. When the excavation operation is carried out, it is necessary to add a cutting box. The first protrusion on the top of the lower cutting box is aligned with the first groove on the bottom of the newly added cutting box, so as to facilitate insertion and positioning, so as to fix the two cutting boxes, and at the same time, the pneumatic grooves between the two cutting boxes are also connected.

[0012] Furthermore, a sealing ring is provided on the inner side of the first groove. The inner side of the sealing ring fits against the outer side of the first protrusion. After the first protrusion on one cutting box is inserted into the air inlet groove at the bottom of another cutting box, the sealing ring seals the insertion part to prevent air pressure leakage inside the air groove.

[0013] Furthermore, an air guide pipe connected to the pneumatic trough is fixedly installed on the uppermost cutting box. The end of the air guide pipe away from the cutting box is connected to the air pump port of the air pump. A pressure gauge and a valve are fixedly installed on the air guide pipe. During excavation operations, the valve is closed, and the pressure gauge can be used to monitor the change in air pressure in the pneumatic trough. Sealing covers that block the pneumatic troughs are fixedly installed on other cutting boxes.

[0014] Furthermore, the top of the cutting box is provided with a second protrusion, and the bottom of the cutting box is provided with a second groove. The second protrusion and the second groove are adapted to each other, and a grout guide groove is provided between the second protrusion and the second groove. During the excavation operation, the injected grout is guided through the grout guide groove on each cutting box. A sealing ring is also provided inside the second groove to seal the insertion part of the second protrusion and the second groove after the two cutting boxes are spliced ​​together, so as to prevent the grout from leaking during the excavation operation.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. The TRD construction stratum excavation equipment provided in this application has several equidistantly arranged support blocks set on both sides of each cutting box. The sliding blocks are connected to the support blocks by being movably set in the pneumatic grooves opened on both sides of the cutting box. The support blocks support the running chain by injecting air into the pneumatic grooves, so that the cutter on the chain can perform excavation operations. When encountering hard rocks during horizontal excavation, the air in the pneumatic grooves can be further compressed to avoid hard contact between the hard rocks and the cutter, which would easily lead to the damage of the cutter, thus improving the service life of the cutter.

[0017] 2. When encountering hard rocks during horizontal excavation, the obstruction of the hard rocks allows the cutting tools and chain to pass through. This pushes the support block and sliding block towards the inside of the pneumatic groove, thereby compressing the inner cavity of the pneumatic groove and increasing the air pressure value inside the pneumatic groove. This allows the construction personnel to be aware of the situation in time, reduce the operating speed of the chain, and further protect the chain and cutting tools.

[0018] 3. When encountering small hard rocks during horizontal excavation, only the support blocks and sliding blocks in the area where the hard rocks are located move towards the inside of the pneumatic groove. The soil layers above and below the hard rocks will still be excavated by the cutters that move with the chain until the soil layers above and below the hard rocks are excavated to a loose state. The hard rocks will fall off under the rotational force of the cutters without the need to stop the machine for crushing, thus improving work efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of one of the cutting boxes;

[0022] Figure 3 for Figure 2 Schematic diagram of the connection structure between the sliding block and the support block;

[0023] Figure 4 for Figure 2 A magnified schematic diagram of the structure at point A;

[0024] Figure 5 for Figure 2 A magnified schematic diagram of the structure at point B.

[0025] In the diagram: 1. Drive unit; 2. Cutting box; 201. Pneumatic groove; 202. Air guide groove; 203. First protrusion; 204. Air inlet groove; 205. First groove; 206. Sealing ring; 207. Second protrusion; 208. Second groove; 209. Slurry guide groove; 3. Driven unit; 4. Chain; 5. Cutting tool; 6. Sliding block; 7. Support block; 8. Limiting frame plate; 9. Rectangular frame sealing ring; 10. Air guide pipe; 11. Pressure gauge; 12. Valve; 13. Sealing cover; 14. Rectangular frame scraper. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Examples, such as Figures 1-2A TRD (Tracking Drilling) construction stratum excavation equipment includes a drive unit 1 fixedly mounted on a main unit (the main unit includes a frame and a chassis, which are existing known equipment, and the inventive point of this invention is not involved, so they are not shown in the figure). Several detachable cutting boxes 2 are arranged below the drive unit 1. Driven parts 3 are fixedly installed inside the drive unit 1 and at the bottom of the cutting box 2, respectively. A chain 4 is connected between the driven part 3 at the bottom of the cutting box 2 and the driven part 3 arranged inside the drive unit 1. Several equally spaced cutters 5 are fixedly mounted on the chain 4.

[0028] Please see Figures 1-5 The cutting box 2 has several longitudinally equidistant pneumatic grooves 201 on both sides, and the pneumatic grooves 201 are connected to each other through air guide grooves 202 on the cutting box 2. The air guide grooves 202 are close to the inner side of the pneumatic grooves 201. A sliding block 6 is movably fitted inside the pneumatic groove 201. One end of the sliding block 6 extends out of the pneumatic groove 201 and is fixedly connected to a support block 7. Two adjacent support blocks 7 on the outer side of the cutting box 2 are movably fitted together, and the top and bottom of the support blocks 7 are provided with The cutting box 2 has a smooth chamfer. A limiting frame plate 8 is fixedly installed on the outside of the cutting box 2 to limit the sliding block 6. The limiting frame plate 8 is fixed to the cutting box 2 with bolts. When the sliding block 6 moves relative to the cutting box 2, the limiting frame plate 8 limits the sliding block 6, so that two adjacent pneumatic grooves 201 can be connected through the air guide groove 202. The detachable design of the limiting frame plate 8 allows the sliding block 6 to be placed inside the pneumatic groove 201, and then the limiting frame plate 8 is fixed to limit the sliding block 6.

[0029] The sliding block 6 is internally fitted with a rectangular frame sealing ring 9 that movably seals against the inner wall of the pneumatic groove 201. The rectangular frame sealing ring 9 forms a seal against the inner wall of the pneumatic groove 201, isolating the interior of the pneumatic groove 201 from the outside and preventing slurry from seeping into the pneumatic groove 201 during excavation. The top of the drive unit 1 is provided with a first protrusion 203, and the inner side of the first protrusion 203 has an air inlet groove 204 that communicates with the uppermost pneumatic groove 201 of the cutting box 2. The bottom of the drive unit 1 has an air inlet groove 204 that communicates with the first protrusion 203. The first groove 205 is adapted to the cutting box 2, and the interior of the first groove 205 is connected to the pneumatic groove 201 at the bottom of the cutting box 2. The inner side of the first groove 205 is also provided with a sealing ring 206. When the excavation operation is carried out, the cutting box 2 needs to be added. The first protrusion 203 on the top of the lower cutting box 2 is aligned with the first groove 205 at the bottom of the newly added cutting box 2, so as to facilitate the insertion and limiting, so as to fix the two cutting boxes 2, and at the same time, the pneumatic groove 201 between the two cutting boxes 2 is also connected.

[0030] The uppermost cutting box 2 is fixedly equipped with an air guide pipe 10 that connects to the pneumatic trough 201. The end of the air guide pipe 10 away from the cutting box 2 is connected to the air pump port. A pressure gauge 11 and a valve 12 are fixedly installed on the air guide pipe 10. During excavation, the valve 12 is closed, and the pressure gauge 11 can be used to monitor the change in air pressure in the pneumatic trough 201. Other cutting boxes 2 are fixedly equipped with sealing covers 13 that block the pneumatic trough 201.

[0031] The top of the cutting box 2 is provided with a second protrusion 207 located inside the air inlet slot 204, and the bottom of the cutting box 2 is provided with a second groove 208 located inside the first groove 205. The second protrusion 207 and the second groove 208 are adapted to each other, and a slurry guide groove 209 is provided between the second protrusion 207 and the second groove 208. During the excavation operation, the injected slurry is guided through the slurry guide groove 209 on each cutting box 2. A sealing ring 206 is also provided inside the second groove 208 to seal the insertion part of the second protrusion 207 and the second groove 208 after the two cutting boxes 2 are spliced ​​together, so as to prevent the slurry from leaking during the excavation operation.

[0032] A rectangular frame scraper 14 is fixedly installed on the inner side of the limiting frame plate 8. One side of the rectangular frame scraper 14 extends out of the limiting frame plate 8, and the inner side of the rectangular frame scraper 14 is in contact with the outer side of the sliding block 6. When the sliding block 6 moves relative to the cutting box 2, the limiting frame plate 8 and the rectangular frame scraper 14, the rectangular frame scraper 14 is used to clean the surface of the sliding block 6 to prevent the mud attached to the sliding block 6 when it is outside the cutting box 2 from entering the pneumatic tank 201.

[0033] In use, by injecting air into the pneumatic groove 201 and pressurizing it, the gas pressure causes the sliding block 6 to push the support block 7 to move outwards from the cutting box 2 until the sliding block 6 is blocked and limited by the limiting frame plate 8. At this time, the rectangular frame sealing ring 9 on the sliding block 6 moves to the outer side of the pneumatic groove 201. During the excavation operation, the rotation of the driven part 3 causes the chain 4 to run. The sliding block 6 supports the chain 4, and the cutter 5 set on the chain 4 rotates with the operation of the chain 4 to dig trenches in the soil layer. At the same time, the slurry used for soil excavation is introduced through the slurry guide groove 209. During the horizontal movement of the drive part 1, the cutting box 2, and the driven part 3 in the trenching process, when a hard rock is encountered at a certain point, and if the width of the rock is small, that is, it does not exceed the digging width of the cutter 5, the cutter 5 cannot break the hard rock. At this time, the chain 4 transmits the hard rock to the cutting box 201. The block will push the support block 7 and sliding block 6 to move inward to the inside of the cutting box 2. At this time, the pressure value monitored by the pressure gauge 11 increases significantly so that the construction personnel can be aware of it. Thus, the cutter 5 can also pass smoothly in the area where the hard stone is located. In the area above and below the hard stone, the chain 4 can be supported by the structure design of several support blocks 7 on the cutting box 2. At this time, horizontal excavation can continue until the soil layer above and below the hard stone is excavated and loosened, so that the hard stone falls under the operation of the cutter 5. The gas pressure pushes the sliding block 6 and support block 7 in this area to move and reset towards the outside of the cutting box 2. There is no need to break the hard stone. This not only protects the structure of the cutter 5 and improves the service life of the cutter 5, but also eliminates the need to stop the machine to break the hard stone, thereby improving work efficiency.

[0034] When encountering a large, hard rock that exceeds the digging width or length of the cutter 5, the loose soil layer above and below the rock is too small, making it impossible to fall off by the operation of the cutter 5. At this time, the operator can observe through the pressure gauge 11 that the pressure value in the pneumatic tank 201 increases to a certain value and then tends to stabilize and cannot be restored. At this time, the hard rock can be broken up in time to ensure the normal progress of the excavation operation.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stratum excavation equipment for TRD construction, comprising a driving part, a plurality of cutting boxes are arranged below the driving part, a grout guide groove for grouting is formed on the cutting box, a driven part is fixedly installed inside the driving part and at the bottom end of the cutting box respectively, a chain is in transmission connection between the driven part at the bottom end of the cutting box and the driven part arranged inside the driving part, a plurality of cutters arranged at equal intervals are fixedly installed on the chain, characterized in that, The two sides of the cutting box are respectively provided with a plurality of longitudinally equidistantly arranged pneumatic grooves, each pneumatic groove on one cutting box is communicated through a gas guide groove, the pneumatic grooves of the two spliced cutting boxes are communicated, a sliding block is movably sleeved in the pneumatic groove, and one end of the sliding block extends out of the cutting box and is fixedly connected with a supporting block. During the excavation operation, the gas pressure in the pneumatic groove enables the supporting block to support the chain, and the supporting block pushes the sliding block to move to compress the pneumatic groove, so that the cutter passes through the hard stone, and according to the variation range of the gas pressure in the pneumatic groove, it is judged whether the hard stone that cannot be broken by the cutter is encountered during the transverse excavation operation.

2. The TRD construction stratum excavating apparatus according to claim 1, characterized by, The two supporting blocks adjacent to each other on the outer side of the cutting box are movably attached, and the top and bottom of the supporting block are provided with smooth chamfers.

3. The TRD construction stratum excavating apparatus according to claim 1, characterized by, A limiting frame plate for limiting the sliding block is fixedly installed on the outer side of the cutting box and fixed to the cutting box by bolts.

4. The TRD construction stratum excavating apparatus according to claim 3, characterized by, A rectangular frame scraper is fixedly installed on the inner side of the limiting frame plate, one side of the rectangular frame scraper extends out of the outer side of the limiting frame plate, and the inner side of the rectangular frame scraper movably attaches to the outer side of the sliding block.

5. The TRD construction stratum excavating apparatus according to claim 1, wherein, A rectangular frame sealing ring movably sealed with the inner wall of the pneumatic groove is fixedly sleeved in the sliding block.

6. The TRD construction stratum excavating apparatus according to claim 5, wherein The top of the driving part is provided with a first protrusion, the inner side of the first protrusion is provided with an air inlet groove communicated with the uppermost pneumatic groove of the cutting box, the bottom of the driving part is provided with a first recess matched with the first protrusion, and the inner side of the first recess is communicated with the lowermost pneumatic groove of the cutting box.

7. The TRD construction stratum excavating apparatus according to claim 6, wherein The inner side of the first recess is also provided with a sealing ring, and the inner side of the sealing ring is attached to the outer side of the first protrusion.

8. The TRD construction stratum excavating apparatus according to claim 1, wherein A gas guide pipe connected with the pneumatic groove is fixedly installed on the uppermost cutting box, one end of the gas guide pipe away from the cutting box is communicated with the pump air port of the air pump, and a pressure gauge and a valve are fixedly installed on the gas guide pipe.

9. The TRD construction stratum excavating apparatus according to claim 1, wherein, The top of the cutting box is provided with a second protrusion, and the bottom of the cutting box is provided with a second recess, the second protrusion is matched with the second recess, and a communicating slurry guide groove is arranged between the second protrusion and the second recess.

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