A protection device for an old building foundation pit

Abstract

The application discloses a protection device for an old building foundation pit, and relates to the technical field of foundation pit protection devices.The protection device comprises a base and an extension plate, the base is internally provided with an extension groove, the extension plate is slidably arranged in the extension groove, a supporting plate for supporting the inner wall of the foundation pit is rotatably arranged on the extension plate, the extension plate is provided with an accommodating groove for accommodating the supporting plate, a supporting mechanism is arranged in the base and used for supporting the supporting plate, and a fixing mechanism is arranged in the base and used for fixing the extension plate.The protection device has the effect of conveniently accommodating the foundation pit protection device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation pit protection equipment, in particular to a protection equipment for foundation pit of old building. BACKGROUND

[0002] In the urban area of a city, there are often old buildings with historical and cultural atmosphere. Since one of the old buildings has a certain tourism value and educational significance, preserving this part of the old building is an important factor to be considered in urban planning. The new building planned needs to avoid the location of the old building.

[0003] During the construction of the new building, the bottom foundation pit of the new building needs to be excavated first, and the foundation concrete is poured in the foundation pit to provide stable support for the upper structure of the new building. However, when the planned new building is close to the old building, the foundation pit excavated for the new building will reduce the stability of the foundation of the old building adjacent to the new building, that is, the soil at the bottom of the old building will have a tendency to move towards the new building foundation pit. Once the foundation pit collapses, it will seriously affect the stability of the foundation of the old building.

[0004] Therefore, it is necessary to support the inner wall of the new building foundation pit to reduce the possibility of foundation pit collapse. The traditional steel sheet pile support occupies a large space when the components contained in the steel sheet pile are in a non-use state after the steel sheet pile is removed, which is not convenient for storage. SUMMARY

[0005] In order to facilitate the storage of the foundation pit protection equipment, the present application provides a protection equipment for foundation pit of old building.

[0006] The protection equipment for foundation pit of old building provided by the present application adopts the following technical scheme:

[0007] A protection equipment for foundation pit of old building, comprising a base and an extension plate, an extension groove is formed in the base, the extension plate is slidingly arranged in the extension groove, a support plate for supporting the inner wall of the foundation pit is rotatably installed on the extension plate, a containing groove for accommodating the support plate is formed on the extension plate, a support mechanism is arranged in the base, the support mechanism is used for supporting the support plate, and a fixing mechanism is arranged in the base, the fixing mechanism is used for fixing the extension plate.

[0008] By the above technical scheme, when the operator needs to support the side wall of the foundation pit by the device, first, the base is placed on the bottom wall of the foundation pit; then, the extension plate is pulled outward so that the extension plate abuts at the junction of the bottom wall of the foundation pit and the side wall of the foundation pit; then, the support plate is rotated towards the side wall of the foundation pit so that the support plate is as close to the side wall of the foundation pit as possible; finally, the support plate is supported by the support mechanism, and the extension plate is fixed by the fixing mechanism. Under the support of the support plate on the side wall of the foundation pit, the possibility of displacement of the soil body is reduced, and the possibility of collapse of the foundation pit is also reduced.

[0009] When the foundation pit protection device is in a non-use state, first, the fixing of the extension plate by the fixing mechanism and the support of the support plate by the support mechanism are released; then, the support plate is rotated towards the side of the extension plate so that the support plate is accommodated in the accommodating groove; then, the extension plate is pushed towards the side of the base so that the extension plate and the support plate are accommodated in the extension groove, reducing the space occupied by the extension plate and the support plate, thereby facilitating the accommodation of the foundation pit protection device, and facilitating the transportation and hoisting of the device.

[0010] In a preferred example, the support mechanism includes a support rod rotatably mounted on the base, and a plurality of insertion slots are formed in the support plate for inserting the support rod.

[0011] By the above technical scheme, when the operator rotates the support plate to the state of being close to the side wall of the foundation pit, the support rod is inserted into the insertion slot away from the base by rotating the support rod. Under the support of the support rod on the support plate, the possibility of rotating the support plate towards the side of the base is reduced, so that the support plate can effectively protect the foundation pit.

[0012] In addition, since the slopes of different side walls of the foundation pit are different, the inclination angles of the support plate in the support state are also different. At this time, the operator inserts the support rod into different insertion slots, so that the support rod can still support the support plate, thereby improving the application range of the foundation pit protection device.

[0013] In a preferred example, the support plate slidably has a plurality of fixing rods, and the plurality of fixing rods and the plurality of insertion slots are one-to-one correspondingly arranged, and the end of the support rod close to the support plate is provided with a fixing ring for inserting the fixing rod.

[0014] Through the technical scheme, after the operator inserts the supporting rod into the slot, the fixed rod is slid towards the fixed ring, and the fixed rod is inserted into the fixed ring. Under the hindering effect of the fixed rod on the fixed ring, the possibility of the fixed ring being separated from the supporting plate is reduced, so that the supporting effect of the supporting rod on the supporting plate can be maintained, and the supporting rod can effectively support the supporting plate.

[0015] In a preferred example, the supporting plate is slidably provided with a connecting rod, each fixed rod is mounted on the connecting rod, a rack is mounted on the fixed rod, a rotating shaft one is rotatably mounted on the supporting plate, a gear is mounted on the rotating shaft one, and the gear and the rack are in meshing engagement.

[0016] Through the technical scheme, after the operator inserts the supporting rod into the slot, the fixed rod is slid towards the fixed ring, and the fixed rod is inserted into the fixed ring. Under the hindering effect of the fixed rod on the fixed ring, the possibility of the fixed ring being separated from the supporting plate is reduced, so that the supporting effect of the supporting rod on the supporting plate can be maintained, and the supporting rod can effectively support the supporting plate.

[0017] In a preferred example, the end, away from the gear, of the rotating shaft one is provided with a hand wheel, and a recess is formed in the supporting plate to accommodate the hand wheel.

[0018] Through the technical scheme, after the operator inserts the supporting rod into the slot, the fixed rod is slid towards the fixed ring, and the fixed rod is inserted into the fixed ring. Under the hindering effect of the fixed rod on the fixed ring, the possibility of the fixed ring being separated from the supporting plate is reduced, so that the supporting effect of the supporting rod on the supporting plate can be maintained, and the supporting rod can effectively support the supporting plate.

[0019] In addition, since the hand wheel is in the recess, the interference of the hand wheel on the rotation of the supporting plate is reduced during the rotation of the supporting plate into the accommodating groove.

[0020] In a preferred example, a recess is formed in the base to accommodate the supporting rod, an elastic block is arranged in the recess to fix the supporting rod, an embedding groove is formed in the elastic block to accommodate the supporting rod, two limiting protrusions are arranged on the elastic block and located at two sides of the embedding groove, a connecting piece is arranged on the elastic block, and the elastic block and the base are connected through the connecting piece.

[0021] Through the technical scheme, since the supporting rod can be accommodated in the recess, the space occupied by the device in a non-use state is further reduced, so that the storage of the base pit protection device is more convenient.

[0022] In addition, in the process that the operator rotates the support rod into the recess, after the support rod and the limiting protrusions are in contact, the two limiting protrusions are elastically deformed in the direction away from each other by pressing the support rod downward, so that the support rod enters the embedding groove. After the support rod enters the embedding groove, the two limiting protrusions return to the original state, and the possibility of the support rod being separated from the recess is reduced under the hindering effect of the limiting protrusions on the support rod.

[0023] In a preferred example, the connecting piece comprises a bolt, and the elastic block and the base are connected by the bolt.

[0024] According to the above technical solution, the elastic block and the base are detachably connected by the bolt, so that when the constraint effect of the elastic block on the support rod is insufficient, the connection between the elastic block and the base is released by removing the bolt, and a new elastic block is installed in the recess by the bolt.

[0025] In a preferred example, the extension plate is provided with a plurality of insertion holes, and the fixing mechanism comprises an insertion rod which is slidingly arranged in the base in the vertical direction and can be inserted into the insertion holes.

[0026] According to the above technical solution, after the operator slides the extension plate outward to a suitable position, the insertion rod is inserted into the insertion hole, and the possibility of displacement of the extension plate relative to the base is reduced under the hindering effect of the insertion rod on the extension plate.

[0027] In a preferred example, a lead screw is rotatably arranged in the base, and the lead screw is used to drive the insertion rod to slide in the vertical direction.

[0028] According to the above technical solution, after the operator slides the extension plate outward to a suitable position, the lead screw is rotated, the lead screw drives the insertion rod to move downward, and the insertion rod can be inserted into the insertion hole, so as to play the hindering effect of the insertion rod on the extension plate.

[0029] In a preferred example, the support rod is rotatably arranged in the base by a second rotating shaft, a bevel gear one is arranged on the second rotating shaft, the second rotating shaft and the bevel gear one are located in the base, a bevel gear two is arranged on the lead screw, and the bevel gear two and the bevel gear one are meshed with each other.

[0030] According to the above technical solution, in the process that the operator rotates the support rod, the support rod drives the bevel gear one to rotate through the second rotating shaft, the bevel gear one drives the bevel gear two to rotate, the bevel gear two drives the lead screw to rotate, and the lead screw drives the insertion rod to be inserted into the insertion hole of the extension plate, so as to complete the fixation of the insertion rod on the extension plate.

[0031] To sum up, the present application includes the following beneficial technical effects:

[0032] 1、When the device is not in use, the operator can turn the support plate into the accommodating groove and push the epitaxial plate into the epitaxial groove, so that the epitaxial plate and the support plate are accommodated in the base, thereby reducing the space occupied by the device and facilitating the transportation and hoisting of the device;

[0033] 2、During the process of turning the support rod outward by the operator, the fixed ring can be inserted into the insertion slot to facilitate the insertion of the fixed rod into the fixed ring, and the insertion rod can be driven to be inserted into the insertion hole to complete the fixation of the epitaxial plate by the insertion rod, that is, two actions are completed by turning the support rod, thereby simplifying the operation steps of the device;

[0034] 3、The support rod can be fixed in the groove by the elastic block and accommodated in the groove, thereby further reducing the space occupied by the device. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application, mainly showing the structure of the base and the epitaxial plate.

[0036] Figure 2 is a schematic diagram of the overall structure of the embodiment of the present application, mainly showing the structure of the base and the epitaxial plate. Figure 1

[0037] Figure 3 is a schematic diagram of the overall structure of the embodiment of the present application, mainly showing the structure of the base and the epitaxial plate. Figure 1

[0038] Figure 4 is a schematic diagram of the overall structure of the embodiment of the present application, mainly showing the structure of the base and the epitaxial plate. Figure 2

[0039] Figure 5 is a schematic diagram of the overall structure of the embodiment of the present application, mainly showing the structure of the base and the epitaxial plate.

[0040] BRIEF DESCRIPTION OF DRAWINGS

[0041] 1、base; 11, epitaxial groove; 12, groove; 13, lead screw; 14, driving plate; 15, bevel gear one; 16, bevel gear two; 2, epitaxial plate; 21, accommodating groove; 22, insertion hole; 3, support plate; 31, insertion slot; 32, fixed rod; 33, connecting rod; 331, rack; 34, first rotating shaft; 341, spur gear; 342, hand wheel; 35, sink groove; 4, support mechanism; 41, support rod; 411, fixed ring; 412, second rotating shaft; 5, fixing mechanism; 51, insertion rod; 6, elastic block; 61, embedded groove; 62, limiting protrusion; 63, connecting piece; 631, bolt.​​​ DETAILED DESCRIPTION

[0042] The application will be further described below in conjunction with the accompanying drawings. Figure 1 - the accompanying drawings Figure 5 The application will be further described below in conjunction with the accompanying drawings.

[0043] The application discloses a protection device for an old building foundation pit.

[0044] The application will be further described below in conjunction with the accompanying drawings. Figure 1 and the accompanying drawings Figure 2 As shown in the accompanying drawings, a protection device for an old building foundation pit comprises a base 1, the base 1 is horizontally arranged, and each side wall of the base 1 is provided with an extension groove 11, each extension groove 11 is slidably provided with an extension plate 2 in the horizontal direction, and the extension plate 2 can be accommodated in the corresponding extension groove 11. Since each extension plate 2 and its related structure are the same, only one of the extension plates 2 and its related structure will be described below, and the other extension plate 2 will not be described again.

[0045] The application will be further described below in conjunction with the accompanying drawings. Figure 1 and the accompanying drawings Figure 3 As shown in the accompanying drawings, the top surface of each extension plate 2 is provided with a receiving groove 21, the receiving groove 21 is rotatably provided with a support plate 3, the support plate 3 is used for supporting the side wall of the foundation pit, the support plate 3 can be accommodated in the receiving groove 21, and when the support plate 3 is accommodated in the receiving groove 21, the top surface of the support plate 3 is flush with the top surface of the extension plate 2. The base 1 is provided with a support mechanism 4 for supporting the support plate 3, and the base 1 is also provided with a fixing mechanism 5 for fixing the extension plate 2.

[0046] After the building foundation pit is excavated, the bottom wall of the foundation pit is first leveled, and the base 1 is placed in the middle of the bottom wall of the foundation pit; then, the extension plate 2 is pulled outwards, so that the exposed end of the extension plate 2 abuts against the junction of the bottom wall of the foundation pit and the side wall of the foundation pit; then, the support plate 3 is rotated outwards, and the side wall of the foundation pit is supported by the support plate 3.

[0047] Conversely, when the device is in a non-use state, the support plate 3 is first rotated into the receiving groove 21 of the extension plate 2, and then the extension plate 2 is pushed into the extension groove 11, so that the extension plate 2 and the support plate 3 are accommodated in the extension groove 11, thereby reducing the space occupied by the extension plate 2 and the support plate 3, facilitating the accommodation of the foundation pit protection device, and facilitating the transportation and hoisting of the device.

[0048] The application will be further described below in conjunction with the accompanying drawings. Figure 3 and the accompanying drawings Figure 4As shown in the drawings, the support mechanism 4 comprises a support rod 41, the top surface of the base 1 is provided with a groove 12 for accommodating the support rod 41, the support rod 41 is fixedly connected with a rotating shaft two 412, the support rod 41 is rotatably installed on the inner wall of the groove 12 through the rotating shaft two 412, the support plate 3 is provided with a plurality of insertion grooves 31, the insertion grooves 31 are used for inserting the support rod 41, and the plurality of insertion grooves 31 are evenly distributed along the width direction of the support plate 3.

[0049] Referring to the drawings Figure 3 and the drawings Figure 4 As shown in the drawings, the end of the support rod 41 close to the support plate 3 is fixedly connected with a fixed ring 411, the support plate 3 is slidably installed with a connecting rod 33 in the horizontal direction, the connecting rod 33 is fixedly connected with a plurality of fixed rods 32 close to the side wall of the groove 12, the plurality of fixed rods 32 and the plurality of grooves 12 are one-to-one correspondence, the fixed rod 32 and the fixed ring 411 are inserted and matched, and the plurality of fixed rods 32 are evenly distributed along the length direction of the connecting rod 33. The end of the fixed rod 32 away from the connecting rod 33 is pointed.

[0050] Referring to the drawings Figure 3 As shown in the drawings, the connecting rod 33 is fixedly connected with a rack 331 away from the side wall of the groove 12, the rack 331 is horizontally arranged, and a spur gear 341 is rotatably installed in the support plate 3. The spur gear 341 and the rack 331 are meshed with each other, the spur gear 341 is coaxially fixedly connected with a rotating shaft one 34, the end of the rotating shaft one 34 away from the spur gear 341 is coaxially fixedly connected with a hand wheel 342, the support plate 3 is provided with a sunken groove 35 for accommodating the hand wheel 342, and the hand wheel 342 is flush with the side wall of the support plate 3.

[0051] When the operator inserts the support rod 41 into the insertion groove 31, the hand wheel 342 is rotated, the hand wheel 342 drives the rotating shaft one 34 to rotate, the rotating shaft one 34 drives the spur gear 341 to rotate, the spur gear 341 drives the rack 331 and the fixed rod 32 to move towards the fixed ring 411, so that the fixed rod 32 is inserted into the fixed ring 411. Under the hindering action of the fixed rod 32 on the fixed ring 411, the possibility of the fixed ring 411 separating from the support plate 3 is reduced, so that the support rod 41 can maintain the supporting effect on the support plate 3, and the support rod 41 can effectively support the support plate 3.

[0052] Referring to the drawings Figure 1 and the drawings Figure 5As shown, an elastic block 6 is installed in the groove 12. The elastic block 6 is made of spring steel. The lower half of the outer wall of the elastic block 6 is attached to the inner wall of the groove 12. The top of the elastic block 6 is open, and the open side of the elastic block 6 faces upward. An embedding groove 61 for accommodating the support rod 41 is provided on the elastic block 6. Limiting protrusions 62 are provided on both sides of the embedding groove 61. The limiting protrusions 62 and the elastic block 6 are integrally formed. A connector 63 is provided on the elastic block 6. The connector 63 includes bolts 631. The elastic block 6 and the base 1 are connected by bolts 631 to facilitate the replacement of the elastic block 6.

[0053] After the operator rotates the support rod 41 outside the support plate 3, they continue to rotate the support rod 41 into the groove 12. When the support rod 41 comes into contact with the two limiting protrusions 62, the support rod 41 presses against the limiting protrusions 62, causing the two limiting protrusions 62 to elastically deform in a direction away from each other, allowing the support rod 41 to enter the embedding groove 61. After the support rod 41 enters the embedding groove 61, the two limiting protrusions 62 return to their original shape. Under the obstruction of the limiting protrusions 62 on the support rod 41, the possibility of the support rod 41 detaching from the groove 12 is reduced.

[0054] See attached document Figure 1 Appendix Figure 2 and appendix Figure 4 As shown, a bevel gear 15 is coaxially fixedly connected to the rotating shaft 412. A lead screw 13 is rotatably installed inside the base 1. The lead screw 13 is vertically arranged, and a bevel gear 16 is coaxially fixedly connected to the top of the lead screw 13. The bevel gear 16 and the bevel gear 15 mesh with each other. The bevel gear 15 and the bevel gear 16 are rotatably arranged inside the base 1. A drive plate 14 is threadedly connected to the lead screw 13. The drive plate 14 is slidably arranged in the vertical direction inside the base 1. The fixing mechanism 5 includes a vertically arranged insertion rod 51. The bottom end of the insertion rod 51 is pointed. The insertion rod 51 is fixedly connected to the bottom surface of the sliding plate. Several insertion holes 22 are opened on the top surface of the extension plate 2. The insertion holes 22 are evenly distributed along the width direction of the extension plate 2. The insertion rod 51 and the insertion holes 22 are inserted and engaged.

[0055] After the operator rotates the support plate 3 until it abuts against the inner wall of the pit, they then rotate the support rod 41. On one hand, this allows the fixing ring 411 on the support rod 41 to be inserted into the slot 31, so that the fixing rod 32 can fix the fixing ring 411. On the other hand, as the operator rotates the support rod 41 toward the side where the support plate 3 is located, the support rod 41 drives the bevel gear 15 to rotate through the rotating shaft 2 412. The bevel gear 15 drives the bevel gear 16 to rotate, and the bevel gear 16 drives the lead screw 13 to rotate. The lead screw 13 drives the insertion rod 51 to move downward, so that the insertion rod 51 is inserted into the insertion hole 22, thus completing the fixation of the insertion rod 51 onto the extension plate 2. There is no need to operate the insertion rod 51 separately, thus simplifying the operation steps of this equipment.

[0056] Conversely, the operator rotates the support rod 41 in the direction away from the support plate 3, and the support rod 41 drives the lead screw 13 to rotate reversely through the rotating shaft two 412, the bevel gear two 16 and the bevel gear one 15, and the lead screw 13 drives the insertion rod 51 to move upward, so that the insertion rod 51 is separated from the insertion hole 22, thereby releasing the fixation of the insertion rod 51 to the extension plate 2, so as to facilitate the re-storing of the extension plate 2 in the base 1.

[0057] The implementation principle of the embodiment is that: after the building foundation pit is excavated, first, the bottom wall of the foundation pit is leveled, and the base 1 is placed in the middle of the bottom wall of the foundation pit; then, the extension plate 2 is pulled outward, so that the exposed end of the extension plate 2 abuts against the intersection of the bottom wall of the foundation pit and the side wall of the foundation pit; then, the support plate 3 is rotated, so that the support plate 3 abuts against the side wall of the foundation pit as much as possible to support the side wall of the foundation pit; then, the support rod 41 is rotated, so that the fixing ring 411 on the support rod 41 enters the insertion slot 31, and the fixation of the insertion rod 51 to the extension plate 2 is completed during the rotation of the support rod 41; finally, the handle 342 is rotated to drive the fixing rod 32 to be inserted into the fixing ring 411, thereby completing the fixation of the fixing rod 32 to the support rod 41.

[0058] When the device is in a non-use state, first, the handle 342 is rotated to release the fixation of the fixing rod 32 to the support rod 41; then, the support rod 41 is rotated to store the support rod 41 in the recess 12 and to release the insertion rod 51 from the insertion hole 22; then, the support plate 3 is rotated to store the support plate 3 in the accommodating groove 21; finally, the extension plate 2 is pushed into the extension groove 11, so that the extension plate 2 and the support plate 3 are stored in the base 1, thereby reducing the space occupied by the device, and facilitating the transportation and hoisting of the device.

[0059] The embodiments of the specific embodiment are the preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A protective device for foundation pits of old buildings, characterized in that: The system includes a base (1) and an extension plate (2). The base (1) has an extension groove (11) inside, and the extension plate (2) is slidably disposed within the extension groove (11). A support plate (3) for supporting the inner wall of the pit is rotatably mounted on the extension plate (2). A receiving groove (21) for accommodating the support plate (3) is provided on the extension plate (2). A support mechanism (4) is provided inside the base (1) to support the support plate (3). A fixing mechanism (5) is provided inside the base (1) to fix the extension plate (2). (4) Includes a support rod (41), which is rotatably mounted on the base (1). The support plate (3) has several slots (31) for the support rod (41) to be inserted into. Several fixing rods (32) are slidably installed in the support plate (3). The fixing rods (32) and the slots (31) are arranged in a one-to-one correspondence. A fixing ring (411) for the fixing rod (32) to be inserted is installed at one end of the support rod (41) near the support plate (3). The base (1) has a groove (12) for accommodating the support rod (41). An elastic block (6) is provided for fixing the support rod (41). The elastic block (6) has an insertion groove (61) for accommodating the support rod (41). The elastic block (6) has two limiting protrusions (62) located on both sides of the insertion groove (61). A connector (63) is provided on the elastic block (6), and the elastic block (6) and the base (1) are connected by the connector (63). A plurality of insertion holes (22) are provided on the extension plate (2). The fixing mechanism (5) includes a plug rod (51), which slides vertically. The insertion rod (51) is placed inside the base (1) and can be inserted into the insertion hole (22). A lead screw (13) is rotatably installed inside the base (1). The lead screw (13) is used to drive the insertion rod (51) to slide in the vertical direction. The support rod (41) is rotatably installed on the base (1) through a second rotating shaft (412). A first bevel gear (15) is installed on the second rotating shaft (412). The second rotating shaft (412) and the first bevel gear (15) are located inside the base (1). A second bevel gear (16) is installed on the lead screw (13). The second bevel gear (16) and the first bevel gear (15) mesh with each other.

2. The protective device for foundation pits of old buildings according to claim 1, characterized in that: A connecting rod (33) is slidably arranged inside the support plate (3). Each fixed rod (32) is installed on the connecting rod (33). A rack (331) is installed on the fixed rod (32). A rotating shaft (34) is rotatably installed on the support plate (3). A spur gear (341) is installed on the rotating shaft (34). The spur gear (341) and the rack (331) mesh with each other.

3. The protective device for foundation pits of old buildings according to claim 2, characterized in that: A handwheel (342) is installed at the end of the rotating shaft (34) away from the flat gear (341), and a groove (35) is provided on the support plate (3) to accommodate the handwheel (342).

4. The protective device for foundation pits of old buildings according to claim 1, characterized in that: The connector (63) includes a bolt (631), and the elastic block (6) and the base (1) are connected by the bolt (631).

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