Power transmission line engineering foundation pit operation protection device
By designing protective devices for adjustable height support rods and bow plate members, the safety threat of the soil lifting frame falling during foundation pit construction is solved, ensuring the safety of the operators and preventing the fall and the damage of the flying objects.
Patent Information
- Application Number
- CN202422467103.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-12
AI Technical Summary
During the construction of foundation pits for transmission line engineering, the brake failure of the existing device caused the soil lifting frame to fall rapidly, endangering the safety of the operators. The existing safety helmet cannot be effectively protected, and the stones that fly out of the earth are also threatened.
A protective device including a retractable support rod and a bow plate is designed. The support rod can be adjusted in height. The bow plate is erected on the foundation pit wall protection steps. Below the bow plate provides workers with a standing space. When the bow plate overturns, it absorbs impact force and prevents damage.
Effectively protect the safety of workers in the foundation pit, avoid falling and smashing the soil lifting frame, reduce damage to flying objects, and verify safety through simulation tests.
Smart Images
Figure CN223293426U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of power transmission line engineering, in particular to a protective device for foundation pit operations in power transmission line engineering. Background Art
[0002] In the construction of power transmission lines, foundation pits are typically over 10 meters deep. Especially for UHV projects, pit depths can reach 16 meters, creating a significant workload. Excavation work requires an integrated device (winch / electric winch) for excavation. However, during excavation, the device's wire rope drive motor presents a risk of brake failure. If this occurs, the soil lifting frame attached to the lower end of the wire rope will rapidly fall into the pit, posing a significant safety threat to workers inside.
[0003] Currently, workers in foundation pits wear hard hats as a form of protection. Because the lifting frame falls quickly, workers have limited space to dodge, making them more likely to be hit. If they are hit, the hard hat only serves as a buffer, and workers can still be injured, often seriously. Furthermore, even if workers avoid the frame, the flying soil and rocks from the frame could still injure them. Utility Model Content
[0004] The utility model aims to provide a protective device which can ensure the safety of workers in a foundation pit at any time during the excavation process of the foundation pit.
[0005] The power transmission line engineering foundation pit operation protection device provided by the utility model adopts the following technical scheme: the device includes a retractable support rod component and a bow-shaped plate component with a detachable upper end thereof, the lower end of the support rod component is supported on the pit bottom during the excavation process, the arch height of the bow-shaped plate component is less than the radius of the circle corresponding to the bow-shaped plate, and the periphery of the bow-shaped plate component is erected on the layer steps of the foundation pit retaining wall.
[0006] When the above technical solution is implemented, the support rod component includes a sleeve and an adjustment rod inserted therein, and the two are connected by a radial bolt rod.
[0007] When the above technical solution is implemented, a pair of penetrating radial holes are respectively provided on the top and upper part of the sleeve, and a row of penetrating radial holes are provided on the adjusting rod along the axial direction. After the radial holes of specified heights on the adjusting rod are aligned with the radial holes on the sleeve, the radial bolt rod is inserted to position the adjusting rod.
[0008] When the above technical solution is implemented, a thick nut is welded to the lower end of the sleeve, the nut is connected to the screw, and the lower end of the screw is vertically welded to the bottom plate.
[0009] When the above technical solution is implemented, the arched plate component includes an arched plate and a skeleton connected to its lower side.
[0010] When the above technical solution is implemented, the skeleton includes a long rectangular tube, a short rectangular tube and an arc-shaped tube. The long rectangular tube is arranged along the chord length direction of the arch plate, and the short rectangular tube is arranged along the arch height direction of the arch plate. L-shaped notches for overlapping layer steps are provided on the lower sides of the outer ends of the long rectangular tube and the short rectangular tube, and the two ends and the middle of the arc-shaped tube are welded to the long rectangular tube and the short rectangular tube respectively.
[0011] When the above technical solution is implemented, a short column is welded to the lower side of the short rectangular tube near the long rectangular tube, and the top of the adjusting rod is inserted into the short column and then bolted via a radial rod.
[0012] When the above technical solution is implemented, a short column is welded on the lower side of the short rectangular tube near the long rectangular tube, and the short column is threadedly connected with at least a pair of radial bolts. After the top of the adjusting rod is inserted into the short column, it is tightened against the outer wall and fixed by the radial bolts.
[0013] When the above technical solution is implemented, a shock-absorbing plate is attached to the upper side of the arched plate.
[0014] The support rod components of this utility model are height-adjustable, allowing installation and use when excavating to different depths. During installation, the support rod components are supported at the bottom of the actual pit, and the arched plate components are placed on the steps of the foundation pit retaining wall, ensuring stable installation of the entire device. During soil lifting operations, workers in the pit stand under the arched plate components. The arch height of the arched plate components is less than the radius of the corresponding circle of the foundation pit. On the one hand, this ensures the normal lifting and lowering of the soil lifting frame. On the other hand, if the soil lifting frame falls and hits the arched plate, it can ensure that the protective device overturns toward the larger side of the foundation pit space. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic front view of an embodiment of the present invention.
[0016] Figure 2 for Figure 1 A magnified schematic diagram of part A in FIG.
[0017] Figure 3 for Figure 1 Schematic top view of .
[0018] Figure 4 for Figure 1 Schematic bottom view of the middle arch plate component. DETAILED DESCRIPTION
[0019] like Figure 1 、 Figure 2 As shown, the power transmission line engineering foundation pit operation protection device disclosed in this embodiment includes a support rod component 1 and a bow plate component 2 connected to the upper end thereof.
[0020] In order to make the device applicable to the entire process of foundation pit excavation, the height of the support rod component 1 can be adjusted to adapt to the protection when excavating to different depths.
[0021] Specifically, the support rod component 1 includes a sleeve 11 and an adjusting rod 12 inserted therein. The adjusting rod 12 is provided with a row of radial holes extending therethrough in the axial direction. A pair of radial holes extending therethrough are respectively provided on the top and upper portion of the sleeve 11. After the radial holes of specified heights on the adjusting rod 12 are aligned with the radial holes on the sleeve 11, a radial bolt rod is inserted to position the adjusting rod. The radial bolt rod is provided with a nut to prevent the radial bolt rod from falling.
[0022] A pair of radial holes are respectively provided on the top and upper portion of the sleeve 11, which not only enables the height of the support rod component 1 to be adjusted over a wide range, but also ensures stability after the adjusted height is fixed.
[0023] A thick nut 13 is welded to the lower end of the sleeve 11 , and the thick nut is connected to a screw rod 14 , and the lower end of the screw rod is vertically welded to a bottom plate 15 .
[0024] The support rod member 1 can be adjusted in a wide range of height by changing the insertion length of the adjustment rod 12 and the sleeve 11 , and can be fine-tuned in height by adjusting the overlapping length of the screw rod 14 and the sleeve 11 .
[0025] The arched plate member 2 comprises an arched plate 21 and a frame welded to the underside thereof.
[0026] To ensure the vertical movement of the soil lifting frame, the height of the arched plate 21 is less than the radius of the circle corresponding to the foundation pit. Preferably, the height of the arched plate 21 is approximately half the radius of the circle corresponding to the foundation pit. On the one hand, the arched plate 21 provides ample standing space for workers in the pit (usually one person, or at most two people, can stand in the pit), preventing soil from spilling onto workers' heads as the soil lifting frame rises. On the other hand, if the soil lifting frame falls and hits the arched plate, the entire protective device can be tilted toward the larger space in the foundation pit, ensuring the safety of the workers.
[0027] The skeleton includes a long rectangular tube 22 , a short rectangular tube 23 and an arc tube 24 . The long rectangular tube 22 is arranged along the chord length direction of the arched plate 21 , and the short rectangular tube 23 is arranged along the bow height direction of the arched plate 21 .
[0028] L-shaped notches QK for overlapping steps are provided on the lower sides of the outer ends of the long rectangular tube 22 and the short rectangular tube 23. The two ends and the middle of the arc tube 23 are welded to the long rectangular tube 22 and the short rectangular tube 23 respectively.
[0029] A short column 25 for connecting the adjusting rod 12 is welded to the lower side of the short rectangular tube 23 near the long rectangular tube.
[0030] After the arch plate is welded to its frame, a shock-absorbing plate is attached to its upper side. This plate can be made of a thick rubber sheet. This plate effectively prevents the protective device and the soil lifting frame from tipping over toward the larger side of the foundation pit if the soil lifting frame strikes the arch plate. After tipping over, the arch plate blocks soil and rocks, preventing injury.
[0031] When the support rod member 1 and the arched plate member 2 are assembled, after the top of the adjustment rod 12 is inserted into the short column 25, they can be connected by radial bolts or fixed by radial bolts.
[0032] When the foundation pit is excavated to the specified depth of the first layer, after adjusting the height of the support rod component 1, the arched plate component 2 is erected at the pit mouth, and the bottom plate 15 at the lower end of the support rod component 1 is placed at the bottom of the pit. The bottom plate 15 can be ensured to fall to the ground by rotating the screw 14.
[0033] When the foundation pit is excavated to a specified depth, the periphery of the arched plate member 2 is placed on the protruding step above, and the bottom plate 15 at the lower end of the support rod member 1 is placed on the ground.
[0034] When the soil lifting frame rises to unearth, the workers in the pit stand under the arch plate component 2 to ensure safety.
[0035] The safety of the above protective device has been verified by two impact tests, as follows:
[0036] One time, the soil lifting frame was loaded with 177 kg of soil and rocks, and the other time, the soil lifting frame was loaded with 150 kg of soil and rocks. The protective device was installed at a depth of about 7 meters in the pit, simulating the breakage of the wire rope, causing the soil lifting frame to fall and hit the protective device.
[0037] The result was that after the protective device was impacted, it overturned together with the soil lifting frame to the larger side of the foundation pit space.
[0038] In order to improve the versatility of the protective device, a set of supporting members 1 can be used to match arched plate members 2 of different sizes, and the arched plate members of appropriate sizes can be selected and assembled with the supporting members according to actual needs on site.
Claims
1. A protective device for foundation pit operations in power transmission line projects, characterized by: The device includes a retractable support rod component and a bow-shaped plate component with a detachable upper end thereof. The lower end of the support rod component is supported on the bottom of the pit during the excavation process. The arch height of the bow-shaped plate component is less than the radius of the circle corresponding to the bow plate. The periphery of the bow-shaped plate component is erected on the step of the foundation pit retaining wall.
2. The power transmission line engineering foundation pit operation protection device according to claim 1, characterized in that: The support rod component includes a sleeve and an adjusting rod inserted therein, and the two are connected by a radial bolt rod.
3. The power transmission line engineering foundation pit operation protection device according to claim 2, characterized in that: A pair of penetrating radial holes are respectively provided on the top and upper part of the sleeve, and a row of penetrating radial holes is provided on the adjusting rod along the axial direction. After the radial holes of the specified height on the adjusting rod are aligned with the radial holes on the sleeve, the radial bolt rod is inserted to position the adjusting rod.
4. The protective device for foundation pit operations in power transmission line projects according to claim 3, characterized in that: A thick nut is welded to the lower end of the sleeve, the nut is connected to the screw rod, and the lower end of the screw rod is vertically welded to the bottom plate.
5. The power transmission line engineering foundation pit operation protection device according to claim 2, characterized in that: The arched plate component includes an arched plate and a frame connected to the lower side thereof.
6. The protective device for foundation pit operations in power transmission line projects according to claim 5, characterized in that: The skeleton includes a long rectangular tube, a short rectangular tube and an arc tube. The long rectangular tube is arranged along the chord length direction of the arch plate, and the short rectangular tube is arranged along the arch height direction of the arch plate. L-shaped notches for overlapping layer steps are provided on the lower sides of the outer ends of the long rectangular tube and the short rectangular tube, and the two ends and the middle of the arc tube are welded to the long rectangular tube and the short rectangular tube respectively.
7. The protective device for foundation pit operations in power transmission line projects according to claim 6, characterized in that: A short column is welded on the lower side of the short rectangular tube near the long rectangular tube, and the top of the adjusting rod is inserted into the short column and then bolted via a radial rod.
8. The protective device for foundation pit operations in power transmission line projects according to claim 6, characterized in that: A short column is welded on the lower side of the short rectangular tube near the long rectangular tube, and the short column is threadedly connected with at least a pair of radial bolts. The top of the adjusting rod is inserted into the short column and fixed to the outer wall by the radial bolts.
9. The power transmission line engineering foundation pit operation protection device according to claim 5, characterized in that: A shock-absorbing plate is attached to the upper side of the arched plate.