Pit slot excavating equipment for engineering construction

Abstract

The invention provides pit slot excavation equipment for engineering construction, and belongs to the technical field of foundation pit excavation. Comprising an excavator, an excavator bucket and excavator teeth installed on the excavator bucket, and further comprises a leveling shell arranged on the surfaces of the excavator teeth. And the fixing mechanism is arranged in the leveling shell and comprises a fixing assembly and a closing assembly, the fixing assembly is used for fixing the leveling shell and the digging teeth, and the closing assembly is used for closing the leveling shell and the digging teeth. By arranging the fixing assembly and the closing assembly, when the leveling shell is disassembled, connection between the fixing assembly and the digging teeth can be released by rotating the closing assembly, namely, the leveling shell can be disassembled from the digging teeth, when the leveling shell is installed, the digging teeth are inserted into the leveling shell, the closing assembly is reversely rotated, connection between the fixing assembly and the digging teeth can be achieved, and therefore installation of the leveling shell is achieved; in the process of conversion between the digging teeth and the leveling shell, the digging teeth do not need to be disassembled and assembled, the time for conversion between the digging teeth and the leveling shell is greatly shortened, and operation is easy and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit excavation, and particularly relates to a pit excavation device for engineering construction. Background Art

[0002] During building construction, an excavator is first used to excavate the foundation pit. At the beginning, the excavator uses a bucket with digging teeth to dig the soil according to the planned contour. After the general shape of the foundation pit appears, the construction workers, according to the specifications, use professional tools to remove the digging teeth and install a leveling shell. Then, the excavator is restarted, and according to the design elevation and flatness requirements, the bottom soil of the pit is evenly and moderately scraped and compacted to control the error within the allowable range, laying a foundation for subsequent cushion pouring, foundation construction, etc.

[0003] Before installing the leveling shell, several digging teeth need to be removed from the bucket first, and then the leveling shell is installed on the bucket. When the leveling operation is completed, the leveling shell is removed from the bucket, and the digging teeth are installed on the bucket again. The conversion and installation between the digging teeth and the leveling shell take a long time. Therefore, the present application provides a pit excavation device for engineering construction to meet the needs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a pit excavation device for engineering construction to solve the problem that the conversion and installation between the digging teeth and the leveling shell take a long time.

[0005] To solve the above technical problem, the present invention provides the following technical solutions: A pit excavation device for engineering construction, including an excavator, a bucket, and digging teeth installed on the bucket, further including: A leveling shell, the leveling shell is arranged on the surface of the digging teeth; A fixing mechanism, the fixing mechanism is arranged inside the leveling shell, and the fixing mechanism includes a fixing component and a closing component. The fixing component is used for fixing between the leveling shell and the digging teeth, and the closing component is used for closing between the leveling shell and the digging teeth; When the leveling shell is placed on the ground, the closing component is used to support the leveling shell to make the opening of the leveling shell face upward. After the bucket drives the digging teeth to insert into the leveling shell, the closing component is rotated upward, and the closing component drives the fixing component to act to realize the fixing of the digging teeth and the leveling shell. At the same time, the closing component blocks the opening of the leveling shell to realize the closing of the opening of the leveling shell.

[0006] Preferably, a receiving groove and two square grooves are formed at the top of the leveling shell. The receiving groove is located between the two square grooves, and several digging teeth are respectively inserted into the receiving groove and the two square grooves.

[0007] Preferably, a convex portion is arranged on the leveling shell in the direction of the opening of the bucket. The convex portion is used to increase the contact area between the leveling shell and the ground.

[0008] Preferably, the fixing component includes a plurality of first fixing seats and a plurality of second fixing seats fixed inside the leveling shell. A circular shaft is fixed between adjacent first fixing seats. A circular sleeve is movably sleeved on the surface of the circular shaft. Extrusion blocks are fixed at both ends of the circular sleeve. A plug rod movably penetrates through the inner wall of the second fixing seat. A first guiding surface is provided at one end of the plug rod close to the circular sleeve. A second guiding surface is provided at one end of the extrusion block away from the circular sleeve. A plug block is fixed at the end of the plug rod away from the circular sleeve. A slot is provided on the side surface of the digging tooth. When the digging tooth is located inside the leveling shell, rotate the circular sleeve. The circular sleeve drives the extrusion block to rotate. The first guiding surface of the plug rod slides on the second guiding surface. During the sliding, the plug rod will drive the plug block to insert into the slot, realizing the fixation between the leveling shell and the digging tooth. A connecting plate is fixed at the bottom of the second fixing seat. A resilient member is fixed between the connecting plate and the plug block. The resilient member is a tension spring or an elastic band.

[0009] Preferably, a mud discharge groove is provided on the inner side surface of the slot for discharging mud when the plug block is inserted into the slot.

[0010] Preferably, a circular tube is fixed on the surface of the circular sleeve. A circular rod movably penetrates through the top of the circular tube. A disc is fixed at the bottom of the circular rod. The circumferential surface of the disc is movably connected to the inner wall of the circular tube. A spring is fixed between the top of the disc and the top inner wall of the circular tube. The spring is sleeved on the surface of the circular rod. A vertical groove is provided on the side surface of the leveling shell.

[0011] Preferably, the closing component includes an upper closing plate fixed at the top of the circular rod. A side closing plate is fixed on the side of the upper closing plate away from the opening of the digging tooth. The side surface of the side closing plate is movably connected to the inner wall of the vertical groove.

[0012] Preferably, a protruding portion is provided on the side of the upper closing plate close to the side closing plate. A buckling groove is provided at the bottom of the protruding portion.

[0013] Preferably, a vertical surface is provided on the side of the side closing plate away from the leveling shell. An inclined surface is provided at the bottom of the side closing plate.

[0014] Preferably, a protection component is provided at the bottom of the upper closing plate. The protection component includes a strip-shaped groove opened on the top of the leveling shell. A strip-shaped block is fixed at the bottom of the upper closing plate. A through groove communicating with the leveling shell is provided on the inner wall of the strip-shaped groove. When the upper closing plate is located above the leveling shell, the strip-shaped block is inserted into the strip-shaped groove.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, by setting the fixing component and the closing component, when disassembling the leveling shell, rotating the closing component can release the connection between the fixing component and the digging tooth, and then the leveling shell can be removed from the digging tooth. When installing, insert the digging tooth into the leveling shell and rotate the closing component in the reverse direction to realize the connection between the fixing component and the digging tooth, thus realizing the installation of the leveling shell. During the conversion between the digging tooth and the leveling shell, there is no need to disassemble and assemble the digging tooth, greatly reducing the conversion time between the digging tooth and the leveling shell, and the operation is simple and convenient.

[0016] By setting the upper sealing plate and the side sealing plate, when the leveling shell is placed on the ground, the side sealing plate supports on the ground, and the leveling shell can be supported on the ground with the opening facing upward, which is convenient for the digging tooth to be directly inserted into the leveling shell without the need to support the leveling shell separately, making the operation more convenient. When the upper sealing plate rotates upward, it can not only drive the fixation between the fixing component and the digging tooth, but also close the opening of the leveling shell. At the same time, the side sealing plate can block the vertical groove, preventing mud from entering the leveling shell, and there is no need to clean the inside of the leveling shell later. When the side sealing plate supports on the side of the leveling shell, it can also increase the distance between the two support points of the leveling shell, further improving the stability of the leveling shell when placed on the ground.

[0017] By setting the mud discharge groove, when the insertion block is inserted into the insertion slot, if there is mud in the insertion slot, with the continuous insertion of the insertion block, under the extrusion of the insertion block, the mud will be discharged smoothly along the mud discharge groove. This design effectively avoids the situation where the insertion of the insertion block is blocked due to the accumulation of mud in the insertion slot, thus ensuring the smooth progress of the fixation process between the leveling shell and the digging tooth, and greatly improving the stability when the leveling shell is fixed.

[0018] By setting the convex part, the convex part significantly increases the contact area between the leveling shell and the ground, ensuring that the leveling shell is more stable when placed on the ground. In actual operation, since the convex part is in direct contact with the mud frequently, its special material and structural design endow it with excellent wear resistance, which can effectively resist the frictional loss of the mud, thus greatly improving the overall service durability of the leveling shell and extending the service life of the equipment.

[0019] By setting the protruding part, the protruding part greatly facilitates the upward lifting operation of the upper sealing plate by increasing the contact area with the finger. In actual operation, the operator can apply force more easily and stably. At the same time, the protruding part also increases the contact area with the side sealing plate, effectively strengthening the connection strength between the upper sealing plate and the side sealing plate, ensuring the structural stability of the equipment under complex working conditions. The buckle groove specially set at the bottom of the protruding part further optimizes the human-machine interaction experience. It significantly increases the contact area between the finger and the protruding part, and can effectively prevent the finger from accidentally detaching from the protruding part during the process of lifting the upper sealing plate, greatly improving the stability during the operation and ensuring that the construction personnel can accurately and safely complete the relevant operations of the equipment.

[0020] By setting a vertical surface and an inclined surface, the vertical surface effectively expands the contact area between the side sealing plate and the ground. When the side sealing plate is supported on the ground, its stability is greatly enhanced. At the same time, the inclined surface prompts the bottom of the side sealing plate to closely fit the side surface of the leveling shell, significantly increasing the contact area between the two. Furthermore, when the side sealing plate is supported on the side surface of the leveling shell, the stability of the support is effectively guaranteed. Brief Description of the Drawings

[0021] The drawings forming a part of this specification illustrate embodiments of the present disclosure and, together with the specification, are further used to explain the principles of the present disclosure and enable those skilled in the relevant art to implement and use the present disclosure.

[0022] Figure 1 Schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 Schematic diagram of the three-dimensional structure of the back of the bucket of the present invention; Figure 3 Cross-sectional view at the leveling shell of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of the structure at A in Figure 5 Schematic diagram of the three-dimensional structure at the protruding part of the present invention; Figure 6 Cross-sectional view at the circular tube of the present invention; Figure 7 Schematic diagram of the three-dimensional structure of the first fixing seat of the present invention; Figure 8 Schematic diagram of the three-dimensional structure at the first guiding surface and the second guiding surface of the present invention; Figure 9 Schematic diagram of the three-dimensional structure at the slot of the present invention; Figure 10 Schematic diagram of the three-dimensional structure at the through groove of the present invention.

[0023] In the figure: 1. Bucket; 2. Digging teeth; 3. Leveling shell; 4. Raised part; 5. Square groove; 6. Fixing mechanism; 7. Fixing component; 8. First fixing seat; 9. Circular shaft; 10. Circular sleeve; 11. Circular tube; 12. Circular rod; 13. Disc; 14. Spring; 15. Second fixing seat; 16. Plug rod; 17. First guiding surface; 18. Extrusion block; 19. Second guiding surface; 20. Plug block; 21. Slot; 22. Mud discharge groove; 23. Connecting plate; 24. Rebound member; 25. Sealing component; 26. Upper sealing plate; 27. Side sealing plate; 28. Inclined surface; 29. Vertical surface; 30. Protruding part; 31. Protection component; 32. Strip-shaped groove; 33. Strip-shaped block; 34. Through groove; 35. Vertical groove.

[0024] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device, and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications still fall within the scope of the appended claims. Detailed implementation manners

[0025] The following will describe in detail a trench excavation device for engineering construction provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0026] It should be pointed out that in the specification, references to "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. Additionally, when combining embodiments to describe specific features, structures, or characteristics, implementing such features, structures, or characteristics in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0027] Generally, terms can be understood at least in part from their use in context. For example, at least in part depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather can alternatively, at least in part depending on the context, allow for the existence of other factors that may not be explicitly described.

[0028] As Figures 1 - 10 shown, an embodiment of the present invention provides a trench excavation device for engineering construction, including an excavator (not shown in the figure), a bucket 1, and digging teeth 2 installed on the bucket 1. The bucket 1 is installed at the end of the boom of the excavator, and the boom of the excavator can drive the bucket 1 to move. The digging teeth 2 are fixed to the bucket 1 through a connecting shaft. When the digging teeth 2 need to be disassembled from the bucket 1, the connecting shaft needs to be disassembled first, and then the digging teeth 2 can be removed from the bucket 1. It further includes: A leveling shell 3, which is arranged on the surface of the digging teeth 2; The fixing mechanism 6 is arranged inside the leveling housing 3. The fixing mechanism 6 includes a fixing component 7 and a closing component 25. The fixing component 7 is used for fixing between the leveling housing 3 and the digging teeth 2, and the closing component 25 is used for closing between the leveling housing 3 and the digging teeth 2. When the leveling housing 3 is placed on the ground, the closing component 25 is used to support the leveling housing 3 to make the opening of the leveling housing 3 face upward. After the bucket 1 drives the digging teeth 2 to insert into the leveling housing 3, the closing component 25 is rotated upward. The closing component 25 drives the fixing component 7 to act to realize the fixing of the digging teeth 2 and the leveling housing 3. At the same time, the closing component 25 shields the opening of the leveling housing 3 to realize the closing of the opening of the leveling housing 3. After the digging teeth 2 are inserted into the leveling housing 3, a gap is formed between the digging teeth 2 and the leveling housing 3 to form an opening, and the closing component 25 is used to close this opening.

[0029] As Figure 6 shown, in this embodiment, a receiving groove and two square grooves 5 are opened at the top of the leveling housing 3. The receiving groove is located between the two square grooves 5. A plurality of digging teeth 2 are respectively inserted into the receiving groove and the two square grooves 5. The number of the receiving grooves increases or decreases according to the number of the digging teeth 2, but the number of the digging teeth 2 should be at least more than three.

[0030] As Figure 6 shown, in this embodiment, the leveling housing 3 is provided with a convex portion 4 in the opening direction towards the bucket 1. The convex portion 4 is used to increase the contact area between the leveling housing 3 and the ground. When leveling the foundation pit, the convex portion 4 directly contacts the soil. When the convex portion 4 contacts the soil, the soil will wear the convex portion 4. In contrast, the setting of the convex portion 4 increases the durability of the use of the leveling housing 3.

[0031] As Figures 4 - 10 shown, in this embodiment, the fixing component 7 includes a plurality of fixing seats one 8 and a plurality of fixing seats two 15 fixed inside the leveling housing 3. A round shaft 9 is fixed between adjacent fixing seats one 8. A round sleeve 10 is movably sleeved on the surface of the round shaft 9. Both ends of the round sleeve 10 are fixed with extrusion blocks 18. A plug rod 16 movably penetrates through the inner wall of the fixing seat two 15. A guiding surface one 17 is opened at one end of the plug rod 16 close to the round sleeve 10. A guiding surface two 19 is opened at one end of the extrusion block 18 away from the round sleeve 10. A plug block 20 is fixed at one end of the plug rod 16 away from the round sleeve 10. A slot 21 is opened on the side surface of the digging tooth 2. When the digging tooth 2 is located inside the leveling housing 3, the round sleeve 10 is rotated. The round sleeve 10 drives the extrusion block 18 to rotate. The guiding surface one 17 of the plug rod 16 slides on the guiding surface two 19. During the sliding, the plug rod 16 will drive the plug block 20 to insert into the slot 21 to realize the fixing between the leveling housing 3 and the digging tooth 2. A connecting plate 23 is fixed at the bottom of the fixing seat two 15. A return spring 24 is fixed between the connecting plate 23 and the plug block 20. The return spring 24 is a tension spring or an elastic band. After the guiding surface one 17 contacts the guiding surface two 19, the plug rod 16 is reset by the pulling force of the return spring 24.

[0032] As Figure 9 shown, in this embodiment, a sludge discharge groove 22 is formed on the inner wall side of the slot 21. The sludge discharge groove 22 is used for discharging the soil when the insertion block 20 is inserted into the slot 21. The inner wall of the slot 21 is inclined, and the side surface of the insertion block 20 is also inclined. The inclination angles of the slot 21 and the insertion block 20 are the same. Through the inclined setting, it is convenient to discharge the soil inside the slot 21, and at the same time, it is convenient for the insertion block 20 to be inserted into the slot 21. The sludge discharge groove 22 provided on the slot 21 can reserve space for the soil to be discharged, making it easier for the soil to be discharged from the sludge discharge groove 22.

[0033] As Figure 6 shown, in this embodiment, a circular pipe 11 is fixed on the surface of the circular sleeve 10. A circular rod 12 movably penetrates through the top of the circular pipe 11. A disc 13 is fixed to the bottom of the circular rod 12. The disc 13 can play a limiting role to prevent the circular rod 12 from detaching from the circular pipe 11, making the whole more stable during use. The circumferential surface of the disc 13 is movably connected to the inner wall of the circular pipe 11. A spring 14 is fixed between the top of the disc 13 and the top inner wall of the circular pipe 11. The spring 14 is sleeved on the surface of the circular rod 12. When the upper sealing plate 26 is pulled upward, the spring 14 is in a compressed state. When the upper sealing plate 26 loses restraint, the elastic force of the spring 14 can drive the upper sealing plate 26 to reset. A vertical groove 35 is formed on the side surface of the leveling shell 3. The vertical groove 35 is used to reserve space for the rotation of the circular pipe 11 and the circular rod 12, preventing the circular pipe 11 and the circular rod 12 from getting stuck on the side surface of the leveling shell 3.

[0034] As Figure 6 shown, in this embodiment, the sealing assembly 25 includes an upper sealing plate 26 fixed to the top of the circular rod 12. A side sealing plate 27 is fixed to the side of the upper sealing plate 26 away from the opening of the digging tooth 2. The side surface of the side sealing plate 27 is movably connected to the inner wall of the vertical groove 35. The side sealing plate 27 is used to seal the vertical groove 35 to prevent soil from entering the leveling shell 3 from the vertical groove 35. When the side sealing plate 27 supports on the ground, the side sealing plate 27 can also increase the distance between the support point of the side sealing plate 27 and the leveling shell 3, indirectly increasing the support area when the leveling shell 3 supports and improving the stability of the leveling shell 3 when placed.

[0035] As Figure 5 shown, in this embodiment, a protrusion 30 is provided on the side of the upper sealing plate 26 close to the side sealing plate 27. A buckle groove is formed at the bottom of the protrusion 30. The protrusion 30 not only increases the contact area between the upper sealing plate 26 and the side sealing plate 27, improving the connection strength between the two, but also provides an operating space for the fingers, making it easier for the fingers to drive the upper sealing plate 26 to move upward. By providing the buckle groove, the buckle groove increases the contact area between the fingers and the protrusion 30, preventing the fingers from sliding on the protrusion 30 and improving the stability during operation.

[0036] AsFigure 6 As shown in the figure, in this embodiment, a vertical surface 29 is provided on the side of the side seal plate 27 away from the leveling shell 3, and an inclined surface 28 is provided at the bottom of the side seal plate 27. The vertical surface 29 is used to increase the contact area between the side seal plate 27 and the ground. After the contact area increases, the pressure at the contact position decreases, avoiding the side seal plate 27 from sinking into the soil. At the same time, it can also make the side seal plate 27 contact the ground more stably, and the support of the side seal plate 27 for the leveling shell 3 is more stable. The inclination angle of the inclined surface 28 is the same as the inclination angle of the side surface of the leveling shell 3. Through the inclined surface 28, the bottom of the side seal plate 27 can be completely attached to the side surface of the leveling shell 3, increasing the contact area between the side seal plate 27 and the leveling shell 3 and improving the stability during fixation.

[0037] As Figure 6 、 Figure 7 and Figure 10 As shown in the figure, in this embodiment, a protection component 31 is provided at the bottom of the upper seal plate 26. The protection component 31 includes a strip-shaped groove 32 opened at the top of the leveling shell 3. A strip-shaped block 33 is fixed to the bottom of the upper seal plate 26. A through groove 34 communicating with the leveling shell 3 is opened on the inner wall of the strip-shaped groove 32. When the upper seal plate 26 is located above the leveling shell 3, the strip-shaped block 33 is inserted into the strip-shaped groove 32, which can prevent the upper seal plate 26 from rotating during the use of the leveling shell 3, thereby avoiding the separation between the leveling shell 3 and the digging teeth 2. By providing the through groove 34, the through groove 34 can discharge the soil in the strip-shaped groove 32, preventing the strip-shaped block 33 from being unable to be inserted into the strip-shaped groove 32.

[0038] Working principle: When disassembling the leveling shell 3 from the digging teeth 2, put the finger into the buckle groove of the protruding part 30, lift the upper seal plate 26 upward, so that the strip-shaped block 33 is separated from the strip-shaped groove 32, and the upper seal plate 26 drives the round rod 12 to move upward. When the round rod 12 moves upward, it will drive the disc 13 to move upward. During the upward movement of the disc 13, the spring 14 will be compressed. Then rotate the upper seal plate 26. The upper seal plate 26 will drive the side seal plate 27 to rotate. When rotating the upper seal plate 26, it is necessary to continuously pull the upper seal plate 26 to prevent the upper seal plate 26 from getting stuck at the corner of the leveling shell 3. After rotating the upper seal plate 26 by 90 degrees, the inclined surface 28 at the bottom of the side seal plate 27 will be attached to the side surface of the leveling shell 3. When the upper seal plate 26 rotates by 90 degrees, the upper seal plate 26 will drive the round rod 12 to rotate by 90 degrees. The round rod 12 will drive the round tube 11 to rotate. The round tube 11 will drive the round sleeve 10 to rotate by 90 degrees. The round sleeve 10 will drive the extrusion block 18 to rotate. At this time, the elastic member 24 will pull the insertion block 20 to move, so that the insertion block 20 is separated from the insertion slot 21. At this time, the guiding surface one 17 contacts the guiding surface two 19, and then the digging teeth 2 can be taken out from the inside of the leveling shell 3; When the leveling housing 3 needs to be installed again, insert the digging teeth 2 into the leveling housing 3 through the square groove 5 again. Then, first pull the upper sealing plate 26 to make the upper sealing plate 26 away from the leveling housing 3, and then rotate the upper sealing plate 26 upward so that the upper sealing plate 26 rotates by ninety degrees. At this time, the side sealing plate 27 closes the vertical groove 35, and the upper sealing plate 26 closes the opening between the digging teeth 2 and the square groove 5. After releasing the upper sealing plate 26, the spring 14 rebounds, causing the strip-shaped block 33 to be inserted into the strip-shaped groove 32. If there is soil in the strip-shaped groove 32, the soil in the strip-shaped groove 32 will flow out from the through groove 34, preventing the strip-shaped block 33 from being unable to be inserted into the strip-shaped groove 32. During the upward rotation of the upper sealing plate 26, the round sleeve 10 will drive the extrusion block 18 to rotate, and the guiding surface two 19 on the extrusion block 18 will extrude the guiding surface one 17, causing the insertion rod 16 to move in the direction of the insertion slot 21. The insertion rod 16 will drive the insertion block 20 to be inserted into the insertion slot 21, realizing the fixation of the leveling housing 3.

[0039] This invention covers any alternatives, modifications, equivalent methods, and solutions made to the essence and scope of this invention. To enable the public to have a thorough understanding of this invention, specific details are described in detail in the above preferred embodiments of this invention. However, those skilled in the art can fully understand this invention even without these detailed descriptions.

[0040] The above description is only a preferred implementation manner of this invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of this invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this invention.

Claims

1. A trench excavation device for engineering construction, comprising an excavator, a bucket (1) and digging teeth (2) mounted on the bucket (1), characterized in that: Also includes: A leveling shell (3), wherein the leveling shell (3) is arranged on the surface of the digging tooth (2); A fixing mechanism (6), the fixing mechanism (6) being arranged in the leveling shell (3), the fixing mechanism (6) comprising a fixing component (7) and a closing component (25), the fixing component (7) being used for fixing the leveling shell (3) and the digging teeth (2), and the closing component (25) being used for closing the leveling shell (3) and the digging teeth (2); When the leveling shell (3) is placed on the ground, the closing component (25) is used to support the leveling shell (3) so that the opening of the leveling shell (3) is facing upwards. After the bucket (1) drives the digging teeth (2) to be inserted into the leveling shell (3), the closing component (25) is rotated upwards. The closing component (25) drives the fixing component (7) to move to fix the digging teeth (2) and the leveling shell (3). At the same time, the closing component (25) blocks the opening of the leveling shell (3) to close the opening of the leveling shell (3).

2. The trench excavation equipment for engineering construction according to claim 1, characterized in that: The top of the leveling shell (3) is provided with a receiving groove and two square grooves (5), the receiving groove is located between the two square grooves (5), and a plurality of digging teeth (2) are respectively inserted into the receiving groove and the two square grooves (5).

3. The trench excavation equipment for engineering construction according to claim 1, characterized in that: The leveling shell (3) is provided with a protrusion (4) in the direction of the opening of the bucket (1), and the protrusion (4) is used to increase the contact area between the leveling shell (3) and the ground.

4. The trench excavation equipment for engineering construction according to claim 1, characterized in that: The fixing assembly (7) comprises a plurality of fixing seats (8) and a plurality of fixing seats (15) fixed in the leveling shell (3); a circular shaft (9) is fixed between adjacent fixing seats (8); a circular sleeve (10) is movably sleeved on the surface of the circular shaft (9); extrusion blocks (18) are fixed at both ends of the circular sleeve (10); an insertion rod (16) movably penetrates the inner wall of the fixing seat (15); a guide surface (17) is provided at one end of the insertion rod (16) close to the circular sleeve (10); a guide surface (19) is provided at one end of the extrusion block (18) away from the circular sleeve (10); an insertion rod (16) is fixed at one end of the insertion rod (16) away from the circular sleeve (10); The digging tooth (2) is provided with a slot (21) on the side thereof. When the digging tooth (2) is located in the leveling shell (3), the circular sleeve (10) is rotated, and the circular sleeve (10) drives the extrusion block (18) to rotate. The guide surface 1 (17) of the insertion rod (16) slides on the guide surface 2 (19). During the sliding, the insertion rod (16) drives the insertion block (20) to be inserted into the slot (21), thereby achieving fixation between the leveling shell (3) and the digging tooth (2). A connecting plate (23) is fixed to the bottom of the fixing seat (15), and a rebound member (24) is fixed between the connecting plate (23) and the insertion block (20). The rebound member (24) is a tension spring or an elastic band.

5. The trench excavation equipment for engineering construction according to claim 4, characterized in that: A mud discharge groove (22) is provided on the inner wall side of the slot (21), and the mud discharge groove (22) is used to discharge mud when the insert block (20) is inserted into the slot (21).

6. The trench excavation equipment for engineering construction according to claim 4, characterized in that: A round tube (11) is fixed on the surface of the round sleeve (10), a round rod (12) movably penetrates the top of the round tube (11), a round disc (13) is fixed to the bottom of the round rod (12), the circumferential surface of the round disc (13) is movably connected to the inner wall of the round tube (11), a spring (14) is fixed between the top of the round disc (13) and the top of the inner wall of the round tube (11), the spring (14) is sleeved on the surface of the round rod (12), and a vertical groove (35) is opened on the side of the leveling shell (3).

7. The trench excavation equipment for engineering construction according to claim 6, characterized in that: The closing assembly (25) comprises an upper sealing plate (26) fixed to the top of the round rod (12), a side sealing plate (27) being fixed to the side of the upper sealing plate (26) away from the opening of the digging tooth (2), and a side surface of the side sealing plate (27) being movably connected to the inner wall of the vertical groove (35).

8. The trench excavation equipment for engineering construction according to claim 7, characterized in that: A protrusion (30) is provided on one side of the upper sealing plate (26) close to the side sealing plate (27), and a buckle groove is provided at the bottom of the protrusion (30).

9. The trench excavation equipment for engineering construction according to claim 7, characterized in that: A vertical surface (29) is provided on the side of the side sealing plate (27) away from the leveling shell (3), and an inclined surface (28) is provided on the bottom of the side sealing plate (27).

10. The trench excavation equipment for engineering construction according to claim 7, characterized in that: A protective component (31) is provided at the bottom of the upper sealing plate (26), the protective component (31) comprising a strip groove (32) opened at the top of the leveling shell (3), a strip block (33) is fixed to the bottom of the upper sealing plate (26), a through groove (34) connected to the leveling shell (3) is opened on the inner wall of the strip groove (32), and when the upper sealing plate (26) is located above the leveling shell (3), the strip block (33) is inserted into the strip groove (32).

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