Foundation pit safety protection device for municipal road

Abstract

The invention relates to the technical field of foundation pit supporting devices, in particular to a municipal road foundation pit safety protection device which comprises a vertical frame and supporting plates, multiple sets of supporting plates are arranged, the adjacent supporting plates are detachably and fixedly connected, the vertical frame is provided with a connecting assembly, and the connecting assembly is used for being connected to the vertical frame and the supporting plates. A lifting seat is further arranged on the vertical frame, a first connecting rod is fixedly connected to the bottom of the lifting seat, an inserting plate is arranged at the bottom of the lifting seat, a shield plate is fixedly connected to one end of the inserting plate, the first connecting rod is hinged to the inserting plate, a pushing assembly is further fixedly connected to the vertical frame, and an adjusting assembly is arranged outside the vertical frame. The pushing assembly is used for pushing the lifting seat and the insertion plate to vertically move; according to the supporting device, through the arrangement of the adjusting assembly, the inserting plate located in the soil can be adjusted to be in an inclined state, and the inserting plate and the shield plate are in the inclined state, so that higher supporting force can be exerted on the supporting plate.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit supporting devices, in particular to a foundation pit safety protection device for municipal roads. Background Art

[0002] The foundation pit is a pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. At present, the slope formed during the excavation of the foundation pit is relatively loose in the surface soil. In order to avoid soil landslides, protective nets or protective plates are usually used to protect and support the slope.

[0003] After searching, in the prior art, a Chinese patent with announcement number CN113062327B discloses a foundation pit support device for civil engineering, including a support frame and a support plate, wherein the support plate is close to the inner wall of the foundation pit, and the support frame is arranged on the side of the adjacent support plate away from the inner wall of the foundation pit, wherein the support frame includes a fixed portion and an extension portion, wherein the extension portion is movably connected to the top of one end of the fixed portion close to the support plate, and the fixed portion includes an L-shaped pillar, a slide groove, a first anchor nail, a fixed plate, and a fixed lever.

[0004] When this patent is actually used, there are the following disadvantages:

[0005] The overall support structure in this patent is similar to most of the support structures in the prior art, and is supported by the first anchor nail and the second anchor nail inserted into the soil. However, for a deep foundation pit, only the vertically inserted first anchor nail and the second anchor nail cannot provide effective support. The force acting on the foundation pit is slightly larger, which can easily cause the support plate to be in a tilted state. Summary of the invention

[0006] In view of the technical problem that the integral support structure in the patent mentioned in the background technology is supported by the first anchor nail and the second anchor nail inserted into the soil, which cannot play an effective supporting role, the present invention provides a foundation pit safety protection device for municipal roads.

[0007] The technical solution adopted by the present invention is: a foundation pit safety protection device for municipal roads, comprising a stand and a support plate, the support plate is provided with multiple groups, and adjacent support plates are detachably fixedly connected, the stand is provided with a connecting assembly, the connecting assembly is used to connect to the stand and the support plate, the stand is also provided with a lifting seat, the bottom of the lifting seat is fixedly connected with a first connecting rod, the bottom of the lifting seat is provided with an insertion plate, one end of the insertion plate is fixedly connected with a shield plate, the first connecting rod is hinged to the insertion plate, the stand is also fixedly connected with a pushing assembly, the outside of the stand is provided with an adjusting assembly, the pushing assembly is used to push the lifting seat and the insertion plate to move vertically, and the adjusting assembly is used to adjust the inclination angle of the insertion.

[0008] After adopting the above technical scheme, the foundation pit can be supported by multiple groups of assembled support plates. Support plates of corresponding height can also be spliced ​​according to the depth of the foundation pit. By pushing the setting of the component, when the foundation pit is supported by the support plate, the insert plate and the shield plate can be inserted into the soil to support the support plate. By adjusting the setting of the component, the insert plate located in the soil can be adjusted to an inclined state. By making the insert plate and the shield plate in an inclined state, the support plate can have a stronger supporting force, so that the support plate can support the foundation pit more stably. By making the insert plate and the shield plate in an inclined state, the support plate can have a stronger supporting force, so that the support plate can support the foundation pit more stably. Because through the effect of the inclined support, the supporting force can be decomposed into vertical and horizontal component forces. Compared with the vertical inserted support, it has a stronger supporting force and will not easily cause the support plate to tilt.

[0009] In one embodiment, a positioning slot is provided on the top of the support plate, and a plug plate is fixedly connected to the bottom of the support plate, and the plug plate is used in conjunction with the slot. At least one fixing block is fixedly connected to the outside of the support plate, and at least one through hole is provided in the fixing block. A first connecting plate is provided on the fixing block between two adjacent support plates, and a bolt passing through the first connecting plate is provided. Screw holes are provided at positions corresponding to the bolts of the fixing blocks, and a positioning rod is provided through the through hole, and slots are provided at both ends of the fixing block.

[0010] After adopting the above technical solution, the two adjacent support plates are plugged in through the plug-in plate and the slot. After the plug-in is completed, the two adjacent support plates are fixedly connected by connecting the bolts on the first connecting plate with the fixed block, and the corresponding number of support plates are spliced ​​according to the height of the foundation pit to be supported to form a complete support structure.

[0011] In one embodiment, the connecting assembly includes a fixed frame, a sliding frame, a telescopic assembly hinged on the fixed frame, and a sleeve hinged at the output end of the telescopic assembly, the fixed frame is fixedly connected to the vertical frame, both ends of the sleeve are slidably connected with a sleeve rod, a positioning screw is threaded on the sleeve, a plurality of groups of threaded holes are provided on the outside of the sleeve rod, both ends of the interior of the sliding frame are fixedly connected with a protrusion, the sliding frame is inserted into the outside of the fixed block, the protrusion is slidably connected to the slot, the outside of the sliding frame is fixedly connected with a first guide sleeve, and the sleeve rod is slidably connected to the first guide sleeve.

[0012] After adopting the above technical solution, the sliding frame is sleeved on the outside of the fixed block, and the length of the telescopic assembly is adjusted as needed. At the same time, the sleeve rod is slid and adjusted to allow the sleeve rod to extend into the first guide sleeve. After completion, the position of the sleeve rod is locked by connecting the positioning bolt rod and the sleeve rod. The support plate of the frame can be formed into a connecting structure, and the distance between the support plate and the frame can be easily adjusted by setting the telescopic assembly.

[0013] In one embodiment, the telescopic component is a cylinder or a telescopic rod.

[0014] After adopting the above technical solution, a cylinder is preferably used to facilitate telescopic adjustment.

[0015] In one embodiment, the pushing assembly is a hydraulic cylinder fixedly connected to the stand.

[0016] After adopting the above technical solution, the hydraulic cylinder is used to push the lifting seat to move downward.

[0017] In one embodiment, the adjustment assembly includes a synchronous frame, a second connecting plate fixedly connected to the outside of the synchronous frame, a horizontal plate fixedly connected to the outside of the second connecting plate, and a second connecting rod fixedly connected to the bottom of the horizontal plate, the second connecting rod is hinged to the insertion plate, the output end of the hydraulic cylinder is fixedly connected to the synchronous frame, the top end of the synchronous frame is also fixedly connected to the second support plate, the outside of the horizontal plate is fixedly connected to the second guide sleeve, the outside of the vertical frame is fixedly connected to the guide rod, and the guide rod passes through the second guide sleeve.

[0018] In one embodiment, the adjustment assembly also includes a fixed frame fixedly connected to the lifting seat and a fixed plate fixedly connected to the lifting seat, at least one through plate is penetrated by the fixed plate, an inclined block is fixedly connected to the bottom of the through plate, one end of the through plate is fixedly connected to a first support plate, a spring is connected between the first support plate and the fixed plate, the outside of the vertical frame is fixedly connected to a cross frame, a mounting seat is fixedly connected to the cross frame, and a roller is rotatably connected to the mounting seat.

[0019] After adopting the above technical scheme, the hydraulic cylinder drives the synchronous frame to move downward, and the synchronous frame pushes the lifting seat to move downward synchronously through the resistance of the second support plate to the first support plate, and the insertion plate and the shield plate are inserted into the soil. The hydraulic cylinder pushes downward, and the roller resists the bottom of the inclined block. Through the resistance of the roller to the inclined block, the through plate will pull the first support plate to slide backward, and the hydraulic cylinder continues to push the synchronous frame downward. The synchronous frame drives the first support plate to move downward in the fixed frame, and synchronously drives the cross plate and the second connecting plate to move downward. The second connecting plate pushes the insert plate to rotate a certain angle in the soil, thereby maintaining the inclined state, so that the support plate can be firmly supported.

[0020] In one embodiment, the top and bottom of the first support plate are rotatably connected to multiple sets of balls.

[0021] After adopting the above technical solution, the support plate can be easily slid into or out of the fixed frame through the setting of the balls.

[0022] In one of the embodiments, at least one side of the bottom of the stand is fixedly connected to an insertion rod, and at least one pin is fixedly connected to the bottom of the insertion plate.

[0023] After adopting the above technical solution, through the setting of the insertion rod and the insertion pin, after the insertion rod and the insertion pin are inserted into the soil, the frame can have a stronger supporting force.

[0024] In one of the embodiments, a cutting knife is fixedly connected to the outside of the shield.

[0025] After adopting the above technical solution, the setting of the cutting knife makes it convenient for the insertion plate to rotate and adjust in the soil, and the soil is broken by the cutting knife, which facilitates the rotation of the shield plate.

[0026] The beneficial effects of the present invention are:

[0027] 1. Compared with the prior art, in the present invention, after multiple support plates are spliced ​​together, a complete support structure can be formed, so that the foundation pit can be supported by multiple groups of assembled support plates, and support plates of corresponding height can be spliced ​​according to the depth of the foundation pit. By pushing the setting of the component, when the foundation pit is supported by the support plate, the insert plate and the shield plate can be inserted into the soil to support the support plate. By adjusting the setting of the component, the insert plate located in the soil can be adjusted to an inclined state. By making the insert plate and the shield plate in an inclined state, the support plate can have a stronger supporting force, making the support plate more stable in supporting the foundation pit. Because of the effect of the inclined support, the supporting force can be decomposed into vertical and horizontal component forces. Compared with the vertical inserted support, it has a stronger supporting force and will not easily cause the support plate to tilt.

[0028] 2. Compared with the prior art, in the present invention, two support plates are plugged in through plug plates and slots, and then connected to the fixing block through bolts on the first connecting plate. A corresponding number of support plates are spliced ​​according to the height of the foundation pit to be supported, so that a complete support structure can be formed between multiple support plates.

[0029] 3. Compared with the prior art, in the present invention, the sliding frame can be sleeved on the outside of the fixed block to adjust the length of the telescopic assembly as needed, and at the same time, the sleeve rod can be slid to extend into the first guide sleeve to form an interference limit, so that the distance between the support plate and the frame can be adjusted by setting the telescopic assembly.

[0030] 4. Compared with the prior art, in the present invention, the synchronous frame is driven to move downward by the hydraulic cylinder, and the synchronous frame pushes the lifting seat to move downward synchronously through the resistance of the second support plate to the first support plate, so that the insertion plate and the shield plate are inserted into the soil. The downward push of the hydraulic cylinder, through the resistance of the roller to the inclined block, the through plate will pull the first support plate to slide backward, and the hydraulic cylinder will continue to push the synchronous frame downward. The synchronous frame drives the first support plate to move downward in the fixed frame, and synchronously drives the cross plate and the second connecting plate to move downward. The second connecting plate pushes the insertion plate to rotate a certain angle in the soil, thereby maintaining the inclined state, so that the vertical frame has a strong supporting force on the support plate.

[0031] 5. Compared with the prior art, in the present invention, when the insert plate is taken out, the hydraulic cylinder will drive the second support plate to move upward through the synchronous frame, and pull the insert plate to a horizontal or nearly horizontal state through the second connecting rod. When the second support plate moves to the inner top of the fixed frame, as the second support plate moves upward, the lifting seat will be driven upward through the support of the second support plate and the fixed frame, thereby pulling out the insert plate, the latch and the shield plate in the soil, and after being pulled out, the inclined block no longer conflicts with the roller, so that under the elastic force of the spring, the first support plate will be pushed to the fixed frame for reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the present invention;

[0033] Figure 2 It is a three-dimensional structural schematic diagram of the present invention;

[0034] Figure 3 It is a schematic diagram of the structure of the combined support plate and the connection assembly in the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the combined support plate in the present invention;

[0036] Figure 5 It is a structural schematic diagram of the support plate in the present invention;

[0037] Figure 6 It is a three-dimensional structural schematic diagram of the support plate in the present invention;

[0038] Figure 7 It is a structural schematic diagram of the connection component in the present invention;

[0039] Figure 8 It is a schematic diagram of the three-dimensional structure of the connection component in the present invention;

[0040] Fig. 9 It is a structural schematic diagram of the stand in the present invention;

[0041] Fig.10 It is a schematic diagram of the three-dimensional structure of the stand in the present invention;

[0042] Fig.11 It is a structural schematic diagram of the lifting seat in the present invention;

[0043] Fig.12 It is a three-dimensional structural schematic diagram of the lifting seat in the present invention;

[0044] Fig.13 It is a schematic diagram of the main structure of the lifting seat in the present invention;

[0045] Fig.14 It is a schematic diagram of the cross-sectional structure of the lifting seat in the present invention;

[0046] Fig.15 It is a structural schematic diagram of the synchronous frame in the present invention;

[0047] Fig.16 It is a structural schematic diagram of the fixing plate in the present invention;

[0048] Fig.17 It is a cross-sectional structural schematic diagram of the lifting seat and the synchronous frame in the present invention;

[0049] Fig.18 It is a structural schematic diagram of the insert plate in the present invention.

[0050] The markings in the figure are:

[0051] 100, stand; 1001, insert rod;

[0052] 200, supporting plate; 2001, fixing block; 2002, first connecting plate; 2003, plug-in plate; 2004, slot; 2005, through hole; 2006, positioning rod; 2007, card slot;

[0053] 300, fixed frame; 3001, telescopic assembly; 3002, sleeve; 3002, sleeve rod; 3004, positioning screw; 3005, slide frame; 3006, first guide sleeve; 3007, bump;

[0054] 400, hydraulic cylinder;

[0055] 500, lifting seat; 5001, first connecting rod; 5002, fixing frame; 5003, fixing plate; 5003, through plate; 5005, inclined block; 5006, first supporting plate; 5007, ball bearing; 5008, spring;

[0056] 600, synchronous frame; 6001, guide rod; 6002, cross plate; 6003, second guide sleeve; 6004, second connecting rod; 6005, second connecting plate; 6006, second supporting plate;

[0057] 700, horizontal frame; 7001, mounting seat; 7002, rotating roller;

[0058] 800, insert plate; 8001, shield plate; 8002, latch; 8003, cutting knife. DETAILED DESCRIPTION

[0059] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as “front”, “up”, “down”, “left”, “right”, “vertical” and “horizontal” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0060] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The following is combined with Figure 1-18 The present invention is further described.

[0062] In order to solve the problems existing in the background technology, the present application proposes the following technical solutions: a foundation pit safety protection device for municipal roads, including a stand 100 and a support plate 200, the support plate 200 is provided with a plurality of groups, and adjacent support plates 200 are detachably fixedly connected, the support plate 200 is a steel plate, and a positioning slot 2004 is provided on the top of the support plate 200, and a plug plate 2003 is fixedly connected to the bottom of the support plate 200, the plug plate 2003 is used in conjunction with the slot 2004, and two adjacent support plates are plugged and fixed by the plug plate 2003 and the positioning slot 2004.

[0063] In a further design, at least one fixed block 2001 is fixedly connected to the outside of the support plate 200. In this embodiment, two fixed blocks 2001 are fixedly connected to the outside of each support plate 200. At least one through hole 2005 is provided in the fixed block 2001. In this embodiment, two through holes 2005 are provided in the fixed block 2001.

[0064] Among them, a first connecting plate 2002 is provided on the fixing block 2001 between two adjacent support plates 200, and a penetrating bolt is provided in the first connecting plate 2002. A screw hole is provided at the position of the bolt corresponding to the fixing block 2001. The two adjacent support plates 200 are fixedly connected by connecting the bolts on the first connecting plate 2002 with the fixing block 2001, and a corresponding number of support plates 200 can be spliced ​​according to the height of the foundation pit to be supported. In addition, a positioning rod 2006 is penetrated in the through hole 2005, and slots 2007 are provided at both ends of the fixing block 2001. The positioning rod 2006 is a steel bar or a steel rod, which is used to allow multiple support plates 200 to form an integral support structure.

[0065] In a further design, in this embodiment, a connecting component is also provided on the stand 100 , and the connecting component is used to connect the stand 100 and the supporting plate 200 .

[0066] In the specific design, the connecting component includes a fixed frame 300, a sliding frame 3005, a telescopic component 3001 hinged on the fixed frame 300, and a sleeve 3002 hinged at the output end of the telescopic component 3001. In addition, the fixed frame 300 is fixedly connected to the stand 100, and both ends of the sleeve 3002 are slidably connected with a sleeve rod 3002, and a positioning screw 3004 is threadedly connected to the sleeve 3002. The outer side of the sleeve rod 3002 is provided with a plurality of groups of threaded holes, and both ends of the inner side of the sliding frame 3005 are fixedly connected with a protrusion 3007, and the sliding frame 3005 is plugged into the outer side of the fixed block 2001, and the protrusion 3007 slides with the slot 2007. Dynamic connection, the outside of the sliding frame 3005 is fixedly connected with the first guide sleeve 3006, the sleeve rod 3002 is slidably connected to the first guide sleeve 3006, the telescopic component 3001 is a cylinder or a telescopic rod, preferably a cylinder, and the sliding frame 3005 is sleeved on the outside of the fixed block 2001, and the length of the telescopic component 3001 is adjusted as needed, and the sleeve rod 3002 is slidably adjusted to allow the sleeve rod 3002 to extend into the first guide sleeve 3006. After completion, the position of the sleeve rod 3002 can be locked by connecting the positioning bolt rod and the sleeve rod 3002, so that the frame 100 support plate 200 can form a connection structure.

[0067] In a further design, the pushing assembly provided in this embodiment is a hydraulic cylinder 400 fixedly connected to the stand 100 .

[0068] Among them, the stand 100 is also provided with a lifting seat 500, the bottom of the lifting seat 500 is fixedly connected with a first connecting rod 5001, the bottom of the lifting seat 500 is provided with an insertion plate 800, the lifting seat 500 is used to drive the insertion plate 800 to adjust, and one end of the insertion plate 800 is fixedly connected with a shield plate 8001, the first connecting rod 5001 is hinged to the insertion plate 800, and the stand 100 is also fixedly connected with a pushing component, the outside of the stand 100 is provided with an adjusting component, the pushing component is used to push the lifting seat 500 and the insertion plate 800 to move vertically, and the adjusting component is used to adjust the inclination angle of the insertion.

[0069] In order to facilitate the rotation adjustment of the insert plate 800, a cutting knife 8003 is fixedly connected to the outside of the shield plate 8001. The setting of the cutting knife 8003 makes it convenient to drive the shield plate 8001 to rotate when the insert plate 800 rotates. The cutting knife 8003 is used to cut the soil during the rotation process to facilitate the rotation.

[0070] In the specific design, the adjustment component provided in this embodiment includes a synchronous frame 600, a second connecting plate 6005 fixedly connected to the outside of the synchronous frame 600, a horizontal plate 6002 fixedly connected to the outside of the second connecting plate 6005, and a second connecting rod 6004 fixedly connected to the bottom of the horizontal plate 6002, the second connecting rod 6004 is hinged to the insertion plate 800, the output end of the hydraulic cylinder 400 is fixedly connected to the synchronous frame 600, the hydraulic cylinder 400 is used to drive the synchronous frame 600 to perform lifting and lowering adjustment, and the top end of the synchronous frame 600 is also fixedly connected to a second support plate 6006, the outside of the horizontal plate 6002 is fixedly connected to a second guide sleeve 6003, the outside of the vertical frame 100 is fixedly connected to a guide rod 6001, and the guide rod 6001 passes through the second guide sleeve 6003.

[0071] The explanation is as follows: two adjacent support plates 200 are plugged in through the plug plate 2003 and the slot 2004. After the plugging is completed, the two adjacent support plates 200 are fixedly connected by connecting the bolts on the first connecting plate 2002 with the fixed block 2001, and the corresponding number of support plates 200 are spliced ​​according to the height of the foundation pit to be supported.

[0072] In the specific design, the adjustment component also includes a fixed frame 5002 fixedly connected to the lifting seat 500 and a fixed plate 5003 fixedly connected to the lifting seat 500, at least one through plate 5003 is penetrated by the fixed plate 5003, an inclined block 5005 is fixedly connected to the bottom of the through plate 5003, a first support plate 5006 is fixedly connected to one end of the through plate 5003, a spring 5008 is connected between the first support plate 5006 and the fixed plate 5003, the outside of the vertical frame 100 is fixedly connected to a cross frame 700, a mounting seat 7001 is fixedly connected to the cross frame 700, a roller 7002 is rotatably connected to the mounting seat 7001, and the roller 7002 is used to resist the inclined block 5005 to allow the first support plate 5006 to leave the fixed frame 5002.

[0073] In order to facilitate the sliding adjustment of the first support plate 5006 , a plurality of groups of balls 5007 are rotatably connected to the top and bottom of the first support plate 5006 .

[0074] In this embodiment, at least one side of the bottom of the stand 100 is fixedly connected with an insertion rod 1001, and in this embodiment, two insertion rods 1001 are fixedly connected, and at least one latch 8002 is fixedly connected to the bottom of the insertion plate 800, and in this embodiment, four latches 8002 are arranged at the bottom of the insertion plate 800.

[0075] The above technical solution is explained as follows: the synchronous frame 600 is driven downward by the hydraulic cylinder 400, and the synchronous frame 600 pushes the lifting seat 500 to move downward synchronously through the resistance of the second support plate 6006 to the first support plate 5006; the insertion plate 800 drives the latch 8002 and the shield plate 8001 to move downward, so that the insertion plate 800 and the shield plate 8001 are inserted into the soil until the insertion plate 800 is inserted to the set depth, and the hydraulic cylinder 400 continues to push downward, so that the roller 7002 is resisted at the bottom of the inclined block 5005, and through the resistance of the roller 7002 to the inclined block 5005, the through plate 5003 will pull the first support plate 5006 to slide backward, refer to the attached Fig.14 In the state shown in the figure, the first support plate 5006 compresses the spring 5008, and then the hydraulic cylinder 400 continues to push the synchronous frame 600 to move downward, and the synchronous frame 600 drives the first support plate 5006 to move downward in the fixed frame 5002, and simultaneously drives the cross plate 6002 and the second connecting plate 6005 to move downward, and the second connecting plate 6005 drives the insertion plate 800 to rotate a certain angle in the soil, thereby maintaining the inclined state.

[0076] To sum up, in this embodiment, after multiple support plates 200 are spliced ​​together, a complete support structure can be formed, so that the foundation pit can be supported by multiple groups of assembled support plates 200, and support plates 200 of corresponding height can be spliced ​​according to the depth of the foundation pit. By pushing the setting of the component, when the foundation pit is supported by the support plate 200, the insert plate 800 and the shield plate 8001 can be inserted into the soil to support the support plate 200. By adjusting the setting of the component, the insert plate 800 located in the soil can be adjusted to an inclined state. By making the insert plate 800 and the shield plate 8001 in an inclined state, the support plate 200 can have a stronger supporting force, so that the support plate 200 can support the foundation pit more stably, because through the effect of the inclined support, the supporting force can be decomposed into vertical and horizontal component forces. Compared with the vertical insertion support, it has a stronger supporting force and will not easily cause the support plate 200 to tilt.

[0077] In order for those skilled in the art to fully understand the technical solution, the method of using this embodiment is as follows:

[0078] First, two adjacent supporting plates 200 are plugged in through the plug plate 2003 and the slot 2004. After the plugging is completed, the two adjacent supporting plates 200 are fixedly connected by connecting the bolts on the first connecting plate 2002 with the fixing block 2001, and a corresponding number of supporting plates 200 are spliced ​​according to the height of the foundation pit to be supported; for example, if the height of the supporting plate 200 is 0.5m and the height of the foundation pit is 3m, only six or more supporting plates 200 need to be spliced; then, the positioning rod 2006 is taken out and the positioning rod 2006 is passed through the through hole 2005 on the fixing block 2001, so that a whole reinforcement structure is formed between the multiple supporting plates 200;

[0079] Then, the sliding frame 3005 is sleeved on the outside of the fixed block 2001, and the length of the telescopic assembly 3001 is adjusted as needed. At the same time, the sleeve rod 3002 is slidably adjusted to allow the sleeve rod 3002 to extend into the first guide sleeve 3006. After completion, the position of the sleeve rod 3002 is locked by connecting the positioning bolt rod with the sleeve rod 3002.

[0080] Place the stand 100 at the bottom of the foundation pit, and insert it in a horizontal or nearly horizontal state. Fig.17 In the state shown in FIG. 1 , the hydraulic cylinder 400 is started to drive the synchronous frame 600 to move downward, and the synchronous frame 600 pushes the lifting seat 500 to move downward synchronously through the resistance of the second support plate 6006 to the first support plate 5006;

[0081] The lifting seat 500 drives the insert plate 800 to move downward, and the insert plate 800 drives the latch 8002 and the shield plate 8001 to move downward, so that the insert plate 800 and the shield plate 8001 are inserted into the soil. After the insert plate 800 is inserted to the set depth, the hydraulic cylinder 400 continues to push downward, so that the roller 7002 contacts the bottom of the inclined block 5005. Through the contact of the roller 7002 with the inclined block 5005, the penetration plate 5003 will pull the first support plate 5006 to slide backward. Fig.14 In the state shown in the figure, the first support plate 5006 compresses the spring 5008, and then the hydraulic cylinder 400 continues to push the synchronous frame 600 to move downward, and the synchronous frame 600 drives the first support plate 5006 to move downward in the fixed frame 5002, and simultaneously drives the cross plate 6002 and the second connecting plate 6005 to move downward, and the second connecting plate 6005 drives the insert plate 800 to rotate a certain angle in the soil, so as to maintain the inclined state;

[0082] Keeping the insert plate 800, the latch pin 8002 and the shield plate 8001 in an inclined state has the following advantages:

[0083] When the support plate 200 supports the foundation pit, the inclined insertion plate 800, the latch 8002 and the shield plate 8001 can enable the support plate 200 to have better supporting ability. Compared with vertical insertion, through the effect of inclined support, the supporting force can be decomposed into vertical and horizontal components. The vertical component counteracts the gravity of the support plate 200 and plays a role in supporting the support plate 200, while the horizontal component can provide additional stability to prevent the support plate 200 from moving or shaking in the horizontal direction. In contrast, the vertical support only has a vertical upward supporting force to counteract gravity, and there is no horizontal component to enhance stability.

[0084] Therefore, in this embodiment, the insert plate 800, the latch pin 8002 and the shield plate 8001 are kept in an inclined state in the soil to provide a better supporting force.

[0085] In addition, when the insert plate 800 is taken out, the hydraulic cylinder 400 will first drive the second support plate 6006 to move upward through the synchronous frame 600, and pull the insert plate 800 to a horizontal or nearly horizontal state through the second connecting rod 6004. When the second support plate 6006 moves to the inner top of the fixed frame 5002, as the second support plate 6006 moves upward, the lifting seat 500 will be driven to move upward through the support of the second support plate 6006 and the fixed frame 5002, thereby pulling out the insert plate 800, the latch 8002 and the shield plate 8001 in the soil, and after pulling out, the inclined block 5005 no longer conflicts with the roller 7002, so that under the elastic force of the spring 5008, the first support plate 5006 will be pushed to the fixed frame 5002, located below the second support plate 6006, and return to the initial state. Fig.17 The status shown in .

[0086] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0087] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit safety protection device for a municipal road, comprising a stand (100) and a support plate (200), characterized in that: The support plates (200) are provided with multiple groups, and adjacent support plates (200) are detachably fixedly connected. The stand (100) is provided with a connecting assembly, and the connecting assembly is used to connect the stand (100) and the support plates (200). The stand (100) is also provided with a lifting seat (500), and the bottom of the lifting seat (500) is fixedly connected with a first connecting rod (5001), and the bottom of the lifting seat (500) is provided with an insertion plate (800), and one end of the insertion plate (800) is fixedly connected with a shield plate (8001), and the first connecting rod (5001) is hinged to the insertion plate (800). The stand (100) is also fixedly connected with a pushing assembly, and the outside of the stand (100) is provided with an adjusting assembly, and the pushing assembly is used to push the lifting seat (500) and the insertion plate (800) to move vertically, and the adjusting assembly is used to adjust the inclination angle of the insertion.

2. A municipal road foundation pit safety protection device according to claim 1, characterized in that: The top of the support plate (200) is provided with a positioning slot (2004), the bottom of the support plate (200) is fixedly connected with an insert plate (2003), the insert plate (2003) is used in conjunction with the slot (2004), the outside of the support plate (200) is fixedly connected with at least one fixing block (2001), the fixing block (2001) is provided with at least one through hole (2005), the fixing block (2001) between two adjacent support plates (200) is provided with a first connecting plate (2002), the first connecting plate (2002) is provided with a penetrating bolt, the fixing block (2001) is provided with a screw hole at a position corresponding to the bolt, the through hole (2005) is penetrated with a positioning rod (2006), and both ends of the fixing block (2001) are provided with a card slot (2007).

3. A municipal road foundation pit safety protection device according to claim 2, characterized in that: The connection assembly comprises a fixed frame (300), a sliding frame (3005), a telescopic assembly (3001) hinged on the fixed frame (300), and a sleeve (3002) hinged on the output end of the telescopic assembly (3001); the fixed frame (300) is fixedly connected to the stand (100); both ends of the sleeve (3002) are slidably connected to sleeve rods (3002); a positioning screw (3004) is threadedly connected to the sleeve (3002); The outside of the sleeve rod (3002) is provided with a plurality of threaded holes, and both ends of the inside of the sliding frame (3005) are fixedly connected with protrusions (3007), the sliding frame (3005) is inserted into the outside of the fixed block (2001), the protrusion (3007) is slidably connected with the slot (2007), the outside of the sliding frame (3005) is fixedly connected with a first guide sleeve (3006), and the sleeve rod (3002) is slidably connected with the first guide sleeve (3006).

4. A municipal road foundation pit safety protection device according to claim 3, characterized in that: The telescopic component (3001) is a cylinder or a telescopic rod.

5. The municipal road foundation pit safety protection device according to claim 1, characterized in that: The pushing assembly is a hydraulic cylinder (400) fixedly connected to the stand (100).

6. A municipal road foundation pit safety protection device according to claim 5, characterized in that: The adjustment component includes a synchronous frame (600), a second connecting plate (6005) fixedly connected to the outside of the synchronous frame (600), a transverse plate (6002) fixedly connected to the outside of the second connecting plate (6005), and a second connecting rod (6004) fixedly connected to the bottom of the transverse plate (6002), the second connecting rod (6004) is hinged to the insertion plate (800), the output end of the hydraulic cylinder (400) is fixedly connected to the synchronous frame (600), the top end of the synchronous frame (600) is also fixedly connected to a second support plate (6006), the outside of the transverse plate (6002) is fixedly connected to a second guide sleeve (6003), the outside of the vertical frame (100) is fixedly connected to a guide rod (6001), and the guide rod (6001) passes through the second guide sleeve (6003).

7. A municipal road foundation pit safety protection device according to claim 6, characterized in that: The adjustment assembly also includes a fixing frame (5002) fixedly connected to the lifting seat (500) and a fixing plate (5003) fixedly connected to the lifting seat (500); at least one through plate (5003) is penetrated in the fixing plate (5003); an inclined block (5005) is fixedly connected to the bottom of the through plate (5003); one end of the through plate (5003) is fixedly connected to a first supporting plate (5006); a spring (5008) is connected between the first supporting plate (5006) and the fixing plate (5003); the outside of the vertical frame (100) is fixedly connected to a horizontal frame (700); a mounting seat (7001) is fixedly connected to the horizontal frame (700); a roller (7002) is rotatably connected to the mounting seat (7001).

8. A municipal road foundation pit safety protection device according to claim 7, characterized in that: The top and bottom of the first support plate (5006) are both rotatably connected to a plurality of groups of balls (5007).

9. A municipal road foundation pit safety protection device according to claim 8, characterized in that: At least one side of the bottom of the stand (100) is fixedly connected to an insertion rod (1001), and at least one latch pin (8002) is fixedly connected to the bottom of the insertion plate (800).

10. A municipal road foundation pit safety protection device according to claim 9, characterized in that: The outside of the shield plate (8001) is fixedly connected with a cutting knife (8003).

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