Foundation pit sinking type supporting device in limited space

Abstract

The invention discloses a sunken supporting device for a foundation pit in a confined space, which comprises a mounting device, a supporting device and a supporting device, the sliding type supporting device is installed on the installation device in a penetrating and inserting mode and comprises an elastic reset mechanism, and the elastic reset mechanism is connected with the installation device in a sliding and penetrating and inserting mode. The adjustable supporting mechanism is connected to one end of the elastic reset mechanism, and the adjustable supporting mechanism is used for supporting the inner wall of the foundation pit; the moving distance fine adjustment mechanism is connected to the other end of the elastic reset mechanism; and a propelling device. By means of the arrangement mode that the sliding type supporting devices and the propelling devices are matched, the sliding type supporting devices connected to the mounting beams in a penetrating and inserting mode are extruded through downward movement of the propelling devices, so that stepped supporting of the inner wall of the foundation pit is achieved, and the internal expansion type foundation pit is supported step by step more quickly.

Description

Technical Field

[0001] The present invention relates to the field of foundation pit support devices, and particularly to a sunken support device for a foundation pit in a restricted space. Background Art

[0002] In construction engineering, foundation pit support is an important link to ensure construction safety. Especially during the construction of deep foundation pits, the design and application of the support structure are directly related to the stability and safety of the construction. At present, common foundation pit support devices mainly target foundation pits with vertical planes or regular geometric shapes, and their design and application are relatively mature. However, in actual construction, due to geological conditions, construction techniques, or structural design requirements, the internal space of many foundation pits may gradually expand with increasing depth, resulting in limited applicability of traditional support devices.

[0003] In response to this problem, the in-expanding foundation pit excavation method has gradually received attention. This method first designs a basic foundation pit with the same inner diameter at the top and bottom and conducts excavation. Subsequently, on the basis of the basic foundation pit, a first-level foundation pit is gradually excavated downward, such that the inner diameter of the first-level foundation pit is larger than that of the basic foundation pit. This stepped excavation method can not only effectively control the stability of the foundation pit but also provide a larger internal space for subsequent construction.

[0004] During the above excavation process, after each level of foundation pit is excavated, the excavation work needs to be suspended, and a support device is correspondingly erected to support this level of foundation pit. Since traditional support devices have a fixed length and cannot adapt to the dynamically changing inner diameter of the foundation pit, it is difficult to effectively support such irregular foundation pits. At the same time, the construction method of segmented excavation and step-by-step support has low efficiency. During the construction process, support devices with longer lengths need to be added level by level for support. Erecting the support device wastes a large amount of time, increases the construction difficulty and cost, and causes construction delays. Summary of the Invention

[0005] The purpose of the present invention is to provide a sunken support device for a foundation pit in a restricted space to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A sunken support device for a foundation pit in a restricted space, comprising:

[0007] An installation device, which is installed inside the foundation pit;

[0008] A sliding support device, which is inserted and installed on the installation device. The sliding support device includes:

[0009] An elastic reset mechanism, which is slidably inserted and connected to the installation device;

[0010] Adjustable support mechanism, the adjustable support mechanism is connected to one end of the elastic reset mechanism, and the adjustable support mechanism is used for supporting the inner wall of the foundation pit;

[0011] Moving distance fine-tuning mechanism, the moving distance fine-tuning mechanism is connected to the other end of the elastic reset mechanism;

[0012] Propelling device, the propelling device is installed in the middle of the installation device, and the propelling device is used for squeezing and supporting the moving distance fine-tuning mechanism.

[0013] Preferably, the installation device includes:

[0014] Top plate, the top plate is located above the foundation pit;

[0015] Foot plate, the foot plate is connected to the bottom of the top plate through a support beam, and the foot plate is attached to the top of the foundation pit;

[0016] Installation beam, the installation beam is connected to the lower surface of the top plate, and the number of the installation beams is at least two;

[0017] Bottom plate, the bottom plate is connected to the bottom end of the installation beam, and the bottom plate is installed at the bottom of the foundation pit.

[0018] Preferably, the propelling device includes:

[0019] Motor, the motor is fixedly installed on the top plate;

[0020] Lead screw, the lead screw is rotatably installed between the top plate and the bottom plate, and one end of the lead screw is in transmission connection with the output end of the motor;

[0021] Lifting cylinder, the lifting cylinder is in threaded socket fit with the lead screw;

[0022] Extrusion push frame, the extrusion push frame is connected to the outside of the extrusion push frame through a fixed frame, and the extrusion push frame corresponds to the position of the sliding support device;

[0023] Limit plate, the limit plate is slidably inserted through the extrusion push frame, and one end of the limit plate is fixedly connected to the top plate.

[0024] Preferably, the elastic reset mechanism includes:

[0025] Spliced ​​interpenetrating component, the spliced ​​interpenetrating component is slidably inserted through the installation beam;

[0026] First spring, the first spring is movably sleeved on the outside of the spliced ​​interpenetrating component, and the first spring is arranged between the installation beam and the moving distance fine-tuning mechanism.

[0027] Preferably, the spliced ​​interpenetrating component includes:

[0028] Interleaved brackets, the number of the interleaved brackets is at least one, and the interleaved brackets are arranged end to end in a straight line;

[0029] The first threaded post, the first threaded post is connected to one end of the interleaved bracket, a threaded hole is provided at the other end of the interleaved bracket, and the interleaved brackets are connected end to end through the threaded fit between the first threaded post and the threaded hole;

[0030] The sliding plate, a cavity is provided at one end of the interleaved bracket, and the sliding plate is slidably arranged inside the cavity, and a third spring is installed inside the cavity;

[0031] The positioning post, the positioning post is installed on one side of the sliding plate, the positioning post is slidably inserted and connected to one end of the interleaved bracket, and a positioning hole matched with the positioning post is provided at the other end of the interleaved bracket;

[0032] The first iron block, the first iron block is fixedly embedded in the middle of the sliding plate;

[0033] The first magnet, the first magnet is fixedly installed inside the cavity, and the position of the first magnet corresponds to that of the first iron block;

[0034] The push switch, the push switch is installed on the interleaved bracket.

[0035] Preferably, the adjustable support mechanism includes:

[0036] The second threaded post, the second threaded post is connected to one end of the spliced interleaved component;

[0037] The fixed support plate, the fixed support plate is connected to the end of the second threaded post;

[0038] The rotating support plate, the rotating support plate is rotatably connected to both sides of the fixed support plate;

[0039] The nut seat, the nut seat is in threaded socket fit with the second threaded post;

[0040] The connecting seat, the connecting seat is rotatably arranged outside the nut seat through a bearing;

[0041] The support arm, the support arm is rotatably connected between the rotating support plate and the connecting seat, and the support arm is used for the diagonal bracing of the rotating support plate.

[0042] Preferably, the moving distance fine-tuning mechanism includes:

[0043] The connecting plate, the connecting plate is connected to the other end of the spliced interleaved component;

[0044] The extrusion plate is arranged parallel to the connection plate, and the top end of the extrusion plate is lower than the top end of the connection plate;

[0045] The interpenetrating inclined frame structure is rotatably connected to the top end between the connection plate and the extrusion plate;

[0046] The self-locking adjustment structure, a plurality of the self-locking adjustment structures are connected between the connection plate and the extrusion plate, and the relative distance between the connection plate and the extrusion plate is adjusted by the self-locking adjustment structure.

[0047] Preferably, the interpenetrating inclined frame structure includes:

[0048] The first occlusal inclined plate is rotatably connected to the top of the connection plate;

[0049] The second occlusal inclined plate is rotatably connected to the top of the extrusion plate. The side surface of the second occlusal inclined plate close to the first occlusal inclined plate is provided with occlusal protrusions, and the first occlusal inclined plate is provided with occlusal grooves matched therewith. Both sides of the occlusal protrusions are connected with sliding strips, and both inner walls of both sides of the occlusal grooves are provided with strip grooves, and the sliding strips are slidably inserted and matched with the inner cavities of the strip grooves.

[0050] Preferably, the self-locking adjustment structure includes:

[0051] The sleeve is connected to the connection plate;

[0052] The sliding support rod is connected to the extrusion plate, and the sliding support rod is slidably inserted and connected with the sleeve;

[0053] The one-way clamping member is installed on the sleeve, and the one-way clamping member is used for one-way locking and limiting of the relative position between the sleeve and the sliding support rod.

[0054] Preferably, the one-way clamping member includes:

[0055] The limit seat is fixedly installed on the sleeve;

[0056] The one-way clamping blocks, a plurality of the one-way clamping blocks are fixedly installed on the connection block, the connection block is slidably matched with the sleeve, and a plurality of clamping grooves matched with the one-way clamping blocks are arranged on the sliding support rod;

[0057] The second spring is installed inside the limit seat, and the second spring is used for elastic support of the corners of the connection block;

[0058] The second iron block is connected to the middle of the connection block;

[0059] A second magnet, which is fixedly installed inside the limit seat, and the position of the second magnet corresponds to that of the second iron block.

[0060] Technical effects and advantages of the present invention:

[0061] (1) The present invention utilizes the setting method of cooperating the sliding support device and the propulsion device. Through the downward movement of the propulsion device, the sliding support device inserted and connected to the installation beam is squeezed. Through the sliding support devices arranged with the lengths increasing sequentially in the vertical direction, when the propulsion device squeezes the sliding support device from top to bottom, the sliding support devices in the vertical direction extend out in a stepped manner relative to the foundation pit, so as to realize the stepped support for the inner wall of the foundation pit, without interrupting the excavation and wasting a large amount of time on building the support of the foundation pit, thereby shortening the construction period and realizing more rapid step-by-step support for the in-expanded foundation pit.

[0062] (2) The present invention utilizes the setting method of cooperating the foot plate and the bottom plate. Ground nails are inserted through both the foot plate and the bottom plate. By inserting the ground nails into the solid part of the foundation pit, it is convenient to ensure the stability of the support of the top plate and the installation beam, and make the insertion between the sliding support device and the installation beam more stable.

[0063] (3) The present invention utilizes the setting method of cooperating the extrusion push frame and the limit plate. Through the operation of the motor, it is convenient to drive the self-rotation of the lead screw. With the threaded cooperation between the lead screw and the lifting cylinder, the rotation of the lead screw can advance the up and down position of the lifting cylinder. Driven by the lifting cylinder, the extrusion push frame slides downward in the direction of the sliding support device to extrude and push out the sliding support device. Through the sliding insertion between the extrusion push frame and the limit plate, it is convenient to limit the movement of the extrusion push frame, making the vertical lifting movement of the extrusion push frame more stable, and also facilitating the stable extrusion of the extrusion push frame on the sliding support device, further making the support of the sliding support device for the foundation pit more stable. Brief Description of the Drawings

[0064] Figure 1 is one of the front structure schematic diagrams of the present invention.

[0065] Figure 2 is the second of the front structure schematic diagrams of the present invention.

[0066] Figure 3 is the partial structure schematic diagram of the propulsion device of the present invention.

[0067] Figure 4 is the three-dimensional structure schematic diagram of the sliding support device of the present invention.

[0068] Figure 5 is the front structure schematic diagram of the sliding support device of the present invention.

[0069] Figure 6 This is a schematic diagram of the front view structure of the sliding support device of the present invention.

[0070] Figure 7 This is a schematic diagram of the three-dimensional structure of the moving distance fine-tuning mechanism of the present invention.

[0071] Figure 8 This is a schematic diagram of the internal structure of the self-locking adjustment structure of the present invention.

[0072] Figure 9 This is a schematic diagram of the internal structure of the one-way locking block of the present invention.

[0073] Figure 10 This is a schematic diagram of a partial front view internal structure of the splicing and inserting component of the present invention.

[0074] In the figure: 1. Installation device; 11. Top plate; 12. Foot plate; 13. Installation beam; 14. Bottom plate; 2. Sliding support device; 21. Elastic reset mechanism; 211. Splicing and inserting component; 2111. Inserting bracket; 2112. First threaded column; 2113. Slide plate; 2114. Positioning column; 2115. First iron block; 2116. First magnet; 2117. Press switch; 212. First spring; 22. Adjustable support mechanism; 221. Second threaded column; 222. Fixed support plate; 223. Rotating support plate; 224. Nut seat; 225. Connecting seat; 226. Support arm; 23. Moving distance fine-tuning mechanism; 231. Connecting plate; 232. Extrusion plate; 233. Interpenetrating inclined frame structure; 2331. First engaging inclined plate; 2332. Second engaging inclined plate; 234. Self-locking adjustment structure; 2341. Sleeve; 2342. Sliding support rod; 2343. Limit seat; 2344. One-way locking block; 2345. Second spring; 2346. Second iron block; 2347. Second magnet; 3. Propelling device; 31. Motor; 32. Lead screw; 33. Lifting cylinder; 34. Extrusion push frame; 35. Limit plate. Specific embodiments

[0075] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0076] The present invention provides as Figures 1-10A kind of foundation pit sinking support device in a confined space shown in the figure includes: an installation device 1, which is installed inside the foundation pit; a sliding support device 2, which is inserted and installed on the installation device 1. The sliding support device 2 includes: an elastic reset mechanism 21, which is slidably inserted and connected with the installation device 1; an adjustable support mechanism 22, which is connected to one end of the elastic reset mechanism 21 and is used for supporting the inner wall of the foundation pit; a moving distance fine-tuning mechanism 23, which is connected to the other end of the elastic reset mechanism 21; a propulsion device 3, which is installed in the middle of the installation device 1 and is used for squeezing and supporting the moving distance fine-tuning mechanism 23. Through the downward movement of the propulsion device 3, the sliding support device 2 inserted and connected to the installation beam 13 is squeezed. Through the sliding support device 2 arranged with the lengths increasing sequentially in the vertical direction, when the propulsion device 3 squeezes the sliding support device 2 from top to bottom, the sliding support device 2 in the vertical direction extends out in a stepped manner relative to the foundation pit, so as to realize the stepped support of the inner wall of the foundation pit, without interrupting the excavation and wasting a lot of time in building the support of the foundation pit, thereby shortening the construction period and realizing more rapid step-by-step support for the inwards-expanded foundation pit.

[0077] Specifically, the installation device 1 includes: a top plate 11, which is located above the foundation pit; a foot plate 12, which is connected to the bottom of the top plate 11 through a support beam and the foot plate 12 is attached to the top of the foundation pit; an installation beam 13, which is connected to the lower surface of the top plate 11 and the number of the installation beams 13 is at least two; a bottom plate 14, which is connected to the bottom end of the installation beam 13 and the bottom plate 14 is installed at the bottom of the foundation pit. Ground nails are inserted through both the foot plate 12 and the bottom plate 14. By inserting the ground nails into the solid part of the foundation pit, it is convenient to ensure the stability of the support of the top plate 11 and the installation beam 13, and make the insertion between the sliding support device 2 and the installation beam 13 more stable.

[0078] Specifically, the propulsion device 3 includes: a motor 31 fixedly installed on the top plate 11; a lead screw 32 rotatably installed between the top plate 11 and the bottom plate 14, and one end of the lead screw 32 is drivingly connected to the output end of the motor 31; a lifting cylinder 33 threadedly sleeved with the lead screw 32; an extrusion push frame 34 connected to the outside of the extrusion push frame 34 through a fixing frame, and the extrusion push frame 34 corresponds to the position of the sliding support device 2. The bottom of the extrusion push frame 34 is provided with an inclined surface facing the sliding support device 2 for the contact extrusion of the inserted inclined frame structure 233. The part of the extrusion push frame 34 in contact with the extrusion plate 232 is a plane for providing stable support for the extrusion plate 232; a limiting plate 35 slidably inserted through the extrusion push frame 34, and one end of the limiting plate 35 is fixedly connected to the top plate 11. By operating the motor 31, it is convenient to drive the rotation of the lead screw 32. With the threaded cooperation between the lead screw 32 and the lifting cylinder 33, the rotation of the lead screw 32 can push the up and down position of the lifting cylinder 33. Driven by the lifting cylinder 33, the extrusion push frame 34 moves downward and slides toward the sliding support device 2 for the extrusion and pushing out of the sliding support device 2. Through the sliding insertion between the extrusion push frame 34 and the limiting plate 35, it is convenient to limit the movement of the extrusion push frame 34, making the vertical lifting movement of the extrusion push frame 34 more stable, and also facilitating the stable extrusion of the sliding support device 2 by the extrusion push frame 34, further making the support of the sliding support device 2 for the foundation pit more stable.

[0079] Specifically, the elastic reset mechanism 21 includes: a spliced insertion component 211 slidably inserted through the installation beam 13; a first spring 212 movably sleeved on the outside of the spliced insertion component 211, and the first spring 212 is arranged between the installation beam 13 and the moving distance fine-tuning mechanism 23. Through the compression deformation of the first spring 212, it is convenient to provide elastic support for the moving distance fine-tuning mechanism 23 to assist the reset support of the moving distance fine-tuning mechanism 23, so that the sliding support device 2 is in a retracted state relative to the foundation pit in the initial state, avoiding the sliding support device 2 from interfering with the assembly of the support device into the interior of the foundation pit.

[0080] Specifically, the splicing and interpenetrating component 211 includes: an interpenetrating bracket 2111, the number of interpenetrating brackets 2111 is at least one, and the interpenetrating brackets 2111 are arranged end to end in a straight line; a first threaded post 2112, the first threaded post 2112 is connected to one end of the interpenetrating bracket 2111, a threaded hole is provided at the other end of the interpenetrating bracket 2111, and the interpenetrating brackets 2111 are connected end to end through the threaded fit between the first threaded post 2112 and the threaded hole; a sliding plate 2113, a cavity is provided at one end of the interpenetrating bracket 2111, and the sliding plate 2113 is slidably arranged inside the cavity, and a third spring is installed inside the cavity; a positioning post 2114, the positioning post 2114 is installed on one side of the sliding plate 2113, the positioning post 2114 is slidably inserted and connected to one end of the interpenetrating bracket 2111, and a positioning hole matching the positioning post 2114 is provided at the other end of the interpenetrating bracket 2111; a first iron block 2115, the first iron block 2115 is fixedly embedded in the middle of the sliding plate 2113; a first magnet 2116, the first magnet 2116 is fixedly installed inside the cavity, and the position of the first magnet 2116 corresponds to that of the first iron block 2115; a push switch 2117, the push switch 2117 is installed on the interpenetrating bracket 2111, a rechargeable battery is installed inside the interpenetrating bracket 2111, and a charging port is assembled on the interpenetrating bracket 2111 to provide power supply for the first magnet 2116. The first magnet 2116 is electrically connected to the battery through the push switch 2117. Through the splicing modular design of multiple splicing and interpenetrating components 211 connected end to end, the overall length of the splicing and interpenetrating component 211 can be adaptively adjusted according to the inner diameter length of the foundation pit. When splicing between two interpenetrating brackets 2111, the two interpenetrating brackets 2111 are assembled by screwing the first threaded post 2112 into the threaded hole. Then, the first magnet 2116 is powered off through the push switch 2117. At this time, the first magnet 2116 no longer generates magnetism for the first iron block 2115, and no longer attracts the first iron block 2115. Through the compression deformation of the third spring, the elastic support for the sliding plate 2113 is facilitated, so that the sliding plate 2113 drives the positioning post 2114 to perform a linear extension movement until the positioning post 2114 is inserted into the positioning hole. By inserting the positioning post 2114 between the two interpenetrating brackets 2111, the relative position between the two interpenetrating brackets 2111 is limited, preventing the relative rotation between the two interpenetrating brackets 2111, further making the screwing of the first threaded post 2112 more stable, preventing the loosening of the thread, and making the assembly between the splicing and interpenetrating components 211 more stable. Using the principle of electromagnetic induction, the energized first magnet 2116 generates magnetism to attract the first iron block 2115, so that the positioning post 2114 withdraws from the inner cavity of the positioning hole, and thus the disassembly between the splicing and interpenetrating components 211 can be achieved.

[0081] Specifically, the adjustable support mechanism 22 includes: a second threaded column 221, which is connected to one end of the splicing and inserting component 211; a fixed support plate 222, which is connected to the end of the second threaded column 221; a rotating support plate 223, which is rotatably connected to both sides of the fixed support plate 222; a nut seat 224, which is threadedly sleeved and matched with the second threaded column 221; a connecting seat 225, which is rotatably arranged outside the nut seat 224 through a bearing; a support arm 226, which is rotatably connected between the rotating support plate 223 and the connecting seat 225, and the support arm 226 is used to obliquely support the rotating support plate 223. When it is necessary to support a rectangular foundation pit, the fixed support plate 222 and the rotating support plate 223 are in the same plane to support the inner wall in the planar state. When it is necessary to support a circular foundation pit, through the threaded fit between the nut seat 224 and the second threaded column 221, so that when the nut seat 224 is rotated by the thread, in cooperation with the rotational connection between the nut seat 224 and the connecting seat 225, when the nut seat 224 is rotated by the thread, the axial linear position adjustment of the position of the connecting seat 225 relative to the second threaded column 221 can be carried out. Through the synchronous movement of the connecting seat 225 driving the support arm 226, the position of the support arm 226 pulling the rotating support plate 223 can be realized, so that the two rotating support plates 223 rotate axially relative to the fixed support plate 222, making the fixed support plate 222 and the rotating support plate 223 unfold in a C shape as a whole to support the inner wall of the circular foundation pit. When the foundation pit is circular, the installation beams 13 are arranged in a circular array. At this time, the sliding support devices 2 inserted into the installation beams 13 are also arranged in a circular array relative to the foundation pit, so as to facilitate the circular array support for the circular foundation pit. When the foundation pit is rectangular, the installation beams 13 are arranged parallel to the inner wall of the foundation pit, so that the sliding support device 2 can support the inner wall of the planar foundation pit.

[0082] Specifically, the moving distance fine-tuning mechanism 23 includes: a connecting plate 231, and the connecting plate 231 is connected to the other end of the spliced ​​interpenetrating component 211; an extrusion plate 232, the extrusion plate 232 is arranged parallel to the connecting plate 231, and the top of the extrusion plate 232 is lower than the top height of the connecting plate 231; an interpenetrating inclined frame structure 233, the interpenetrating inclined frame structure 233 is rotatably connected to the top between the connecting plate 231 and the extrusion plate 232; a self-locking adjustment structure 234, a plurality of self-locking adjustment structures 234 are connected between the connecting plate 231 and the extrusion plate 232, and the self-locking adjustment structure 234 is used to adjust the relative distance between the connecting plate 231 and the extrusion plate 232. The connecting plate 231 and the extrusion plate 232 are both vertically arranged, so that the extrusion plate 232 can be easily attached to the side surface of the extrusion push frame 34. Through the height difference set at the top of the connecting plate 231 and the extrusion plate 232, the interpenetrating inclined frame structure 233 connected between the tops of the connecting plate 231 and the extrusion plate 232 is inclined. Through the inclination of the interpenetrating inclined frame structure 233, it is convenient to change the direction of the force. When the extrusion push frame 34 moves vertically to squeeze the interpenetrating inclined frame structure 233, through the component force of the force, the moving distance fine-tuning mechanism 23 has a tendency to move horizontally, so as to squeeze out the elastic reset mechanism 21. The self-locking adjustment structure 234 is convenient for adjusting the relative position between the connecting plate 231 and the extrusion plate 232, so that when the extrusion push frame 34 squeezes the moving distance fine-tuning mechanism 23, the overall horizontal sliding distance of the moving distance fine-tuning mechanism 23 can be finely adjusted. Thus, according to the depth of the excavation in the foundation pit, first, the sliding of the adjustable support mechanism 22 is adjusted once through the splicing between the spliced ​​interpenetrating components 211, and then, by the expansion and contraction of the self-locking adjustment structure 234, the sliding distance that the adjustable support mechanism 22 can move is adjusted for the second time.

[0083] Furthermore, the interspersed inclined frame structure 233 includes: a first occlusal inclined plate 2331, which is rotatably connected to the top of the connecting plate 231; a second occlusal inclined plate 2332, which is rotatably connected to the top of the extrusion plate 232. An occlusal protrusion is provided on the side of the second occlusal inclined plate 2332 close to the first occlusal inclined plate 2331, and an occlusal groove matching it is provided on the first occlusal inclined plate 2331. Sliding strips are connected to both sides of the occlusal protrusion, and strip-shaped grooves are provided on both inner walls of the occlusal groove. The sliding strips are slidably inserted and matched with the inner cavity of the strip-shaped grooves. Through the sliding cooperation between the occlusal protrusion and the occlusal groove, the first occlusal inclined plate 2331 and the second occlusal inclined plate 2332 are slidably inserted and matched. So that when the relative distance between the connecting plate 231 and the extrusion plate 232 is adjusted, the first occlusal inclined plate 2331 and the second occlusal inclined plate 2332 slide relative to each other to adapt to the position adjustment of the extrusion plate 232. Through the sliding cooperation between the sliding strips and the strip-shaped grooves, it is convenient to limit the relative sliding between the first occlusal inclined plate 2331 and the second occlusal inclined plate 2332, so that the first occlusal inclined plate 2331 and the second occlusal inclined plate 2332 can maintain the same plane to face the extrusion of the extrusion push frame 34.

[0084] Further, the self-locking adjustment structure 234 includes: a sleeve 2341 connected to the connecting plate 231; a sliding support rod 2342 connected to the pressing plate 232, and the sliding support rod 2342 is slidably inserted into the sleeve 2341; a one-way clamping member installed on the sleeve 2341 and used for one-way locking and limiting the relative position between the sleeve 2341 and the sliding support rod 2342. The one-way clamping member includes: a limit seat 2343 fixedly installed on the sleeve 2341; a plurality of one-way clamping blocks 2344 fixedly installed on the connecting block, the connecting block is slidably matched with the sleeve 2341, and a plurality of clamping grooves matched with the one-way clamping blocks 2344 are formed on the sliding support rod 2342; a second spring 2345 installed inside the limit seat 2343 and used for elastically supporting the corners of the connecting block; a second iron block 2346 connected to the middle of the connecting block; a second magnet 2347 fixedly installed inside the limit seat 2343 and corresponding to the position of the second iron block 2346. By the sliding insertion between the sleeve 2341 and the sliding support rod 2342, it is convenient to adjust the overall length of the self-locking adjustment structure 234 to adapt to the adjustment of the relative position between the connecting plate 231 and the pressing plate 232. The limit seat 2343 is convenient for limiting the position of the second spring 2345. Through the mutual cooperation between the one-way clamping blocks 2344 and the clamping grooves, it is convenient to realize one-way limit clamping of the sliding support rod 2342. When it is necessary to lengthen the support length of the self-locking adjustment structure 234, directly pull the sliding support rod 2342 outwards. At this time, the one-way clamping blocks 2344 will slide towards the limit seat 2343, and the position adjustment of the pressing plate 232 can be realized. The second spring 2345 is convenient for elastically supporting the one-way clamping blocks 2344, making the cooperation between the one-way clamping blocks 2344 and the clamping grooves more stable, and thus making the support of the sliding support rod 2342 more stable. A storage battery and a switch are installed on the connecting plate 231. The second magnet 2347 is electrically connected to the storage battery through the switch. According to the principle of electromagnetic induction, when the second magnet 2347 is electrified, it will generate magnetism and attract the second iron block 2346, so that the one-way clamping blocks 2344 and the sliding support rod 2342 can be separated from each other to realize the unlocking of the relative position between the sleeve 2341 and the sliding support rod 2342.

[0085] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A foundation pit sinking support device in a confined space, characterized in that: include: An installation device (1), wherein the installation device (1) is installed inside a foundation pit; A sliding support device (2), wherein the sliding support device (2) is installed on the installation device (1) through insertion, and the sliding support device (2) comprises: An elastic reset mechanism (21), the elastic reset mechanism (21) being slidably interlaced and connected with the mounting device (1); An adjustable support mechanism (22), the adjustable support mechanism (22) being connected to one end of the elastic reset mechanism (21), and the adjustable support mechanism (22) being used to support the inner wall of the foundation pit; A moving distance fine-adjusting mechanism (23), wherein the moving distance fine-adjusting mechanism (23) is connected to the other end of the elastic reset mechanism (21); A propulsion device (3) is installed in the middle of the installation device (1), and the propulsion device (3) is used to provide extrusion support for the moving distance fine-tuning mechanism (23).

2. The confined space foundation pit sinking support device according to claim 1, characterized in that: The installation device (1) comprises: A top plate (11), wherein the top plate (11) is located above the foundation pit; A foot plate (12), wherein the foot plate (12) is connected to the bottom of the top plate (11) via a support beam, and the foot plate (12) is attached to the top of the foundation pit; A mounting beam (13), wherein the mounting beam (13) is connected to the lower surface of the top plate (11), and the number of the mounting beams (13) is at least two; A bottom plate (14), the bottom plate (14) is connected to the bottom end of the mounting beam (13), and the bottom plate (14) is installed at the bottom of the foundation pit.

3. The confined space foundation pit sinking support device according to claim 2, characterized in that: The propulsion device (3) comprises: A motor (31), wherein the motor (31) is fixedly mounted on the top plate (11); A screw rod (32), the screw rod (32) being rotatably mounted between the top plate (11) and the bottom plate (14), and one end of the screw rod (32) being drivingly connected to an output end of the motor (31); A lifting cylinder (33), wherein the lifting cylinder (33) is threadedly sleeved with the screw rod (32); An extrusion push frame (34), wherein the extrusion push frame (34) is connected to the outer side of the extrusion push frame (34) through a fixing frame, and the extrusion push frame (34) corresponds to the position of the sliding support device (2); A limit plate (35), wherein the limit plate (35) is slidably interlaced with the extrusion push frame (34), and one end of the limit plate (35) is fixedly connected to the top plate (11).

4. The confined space foundation pit sinking support device according to claim 1, characterized in that: The elastic reset mechanism (21) comprises: A spliced ​​interpenetrating assembly (211), wherein the spliced ​​interpenetrating assembly (211) is slidably interpenetratingly connected to the mounting beam (13); A first spring (212), wherein the first spring (212) is movably sleeved on the outside of the spliced ​​insertion component (211), and the first spring (212) is arranged between the mounting beam (13) and the moving distance fine-tuning mechanism (23).

5. The confined space foundation pit sinking support device according to claim 4, characterized in that: The spliced ​​interlaced component (211) comprises: An interpenetrating bracket (2111), wherein the number of the interpenetrating bracket (2111) is at least one, and the interpenetrating bracket (2111) is arranged end to end in a straight line; A first threaded column (2112), wherein the first threaded column (2112) is connected to one end of the insertion bracket (2111), and a threaded hole is provided at the other end of the insertion bracket (2111), and the insertion brackets (2111) are connected end to end through threaded cooperation between the first threaded column (2112) and the threaded hole; A slide plate (2113), wherein a cavity is formed at one end of the interlaced bracket (2111), and the slide plate (2113) is slidably disposed inside the cavity, and a third spring is installed inside the cavity; A positioning column (2114), wherein the positioning column (2114) is installed on one side of the slide plate (2113), the positioning column (2114) is slidably inserted and connected with one end of the insertion bracket (2111), and the other end of the insertion bracket (2111) is provided with a positioning hole that matches the positioning column (2114); A first iron block (2115), wherein the first iron block (2115) is fixedly embedded in the middle of the slide plate (2113); A first magnet (2116), wherein the first magnet (2116) is fixedly installed inside the cavity, and the first magnet (2116) corresponds to the position of the first iron block (2115); A push switch (2117), wherein the push switch (2117) is installed on the interlaced bracket (2111).

6. The confined space foundation pit sinking support device according to claim 1, characterized in that: The adjustable support mechanism (22) comprises: A second threaded column (221), wherein the second threaded column (221) is connected to one end of the spliced ​​insertion component (211); A fixed support plate (222), wherein the fixed support plate (222) is connected to the end of the second threaded column (221); A rotating support plate (223), wherein the rotating support plate (223) is rotatably connected to two sides of the fixed support plate (222); A nut seat (224), wherein the nut seat (224) is threadably sleeved with the second threaded column (221); A connecting seat (225), wherein the connecting seat (225) is rotatably disposed outside the nut seat (224) via a bearing; A support arm (226), wherein the support arm (226) is rotatably connected between the rotating support plate (223) and the connecting seat (225), and the support arm (226) is used to diagonally support the rotating support plate (223).

7. The confined space foundation pit sinking support device according to claim 1, characterized in that: The moving distance fine-tuning mechanism (23) comprises: A connecting plate (231), wherein the connecting plate (231) is connected to the other end of the spliced ​​insertion component (211); An extrusion plate (232), wherein the extrusion plate (232) and the connecting plate (231) are arranged parallel to each other, and the top end of the extrusion plate (232) is lower than the top end of the connecting plate (231); An interlaced oblique frame structure (233), wherein the interlaced oblique frame structure (233) is rotatably connected to the top end between the connecting plate (231) and the extrusion plate (232); A self-locking adjustment structure (234), wherein a plurality of the self-locking adjustment structures (234) are connected between the connecting plate (231) and the extrusion plate (232), and the self-locking adjustment structure (234) is used to adjust the relative distance between the connecting plate (231) and the extrusion plate (232).

8. The confined space foundation pit sinking support device according to claim 7, characterized in that: The interpenetrating oblique frame structure (233) comprises: A first occlusal inclined plate (2331), wherein the first occlusal inclined plate (2331) is rotatably connected to the top of the connecting plate (231); A second interlocking inclined plate (2332), the second interlocking inclined plate (2332) is rotatably connected to the top of the extrusion plate (232), a side of the second interlocking inclined plate (2332) close to the first interlocking inclined plate (2331) is provided with an interlocking protrusion, and the first interlocking inclined plate (2331) is provided with an interlocking groove matching therewith, both sides of the interlocking protrusion are connected with sliding strips, and both sides of the inner walls of the interlocking groove are provided with strip grooves, and the sliding strips are slidably and interlaced with the inner cavity of the strip groove.

9. The confined space foundation pit sinking support device according to claim 7, characterized in that: The self-locking adjustment structure (234) comprises: A sleeve (2341), wherein the sleeve (2341) is connected to the connecting plate (231); A sliding support rod (2342), wherein the sliding support rod (2342) is connected to the extrusion plate (232), and the sliding support rod (2342) is slidably interlaced with the sleeve (2341); A one-way clamping piece is installed on the sleeve (2341), and the one-way clamping piece is used to one-way lock and limit the relative position between the sleeve (2341) and the sliding support rod (2342).

10. The confined space foundation pit sinking support device according to claim 9, characterized in that: The one-way card connector comprises: A limiting seat (2343), wherein the limiting seat (2343) is fixedly mounted on the sleeve (2341); A one-way card block (2344), wherein a plurality of the one-way card blocks (2344) are fixedly mounted on the connection block, the connection block is slidably matched with the sleeve (2341), and a plurality of card slots matching with the one-way card blocks (2344) are provided on the sliding support rod (2342); A second spring (2345), wherein the second spring (2345) is installed inside the limiting seat (2343), and the second spring (2345) is used to elastically support the corners of the connecting block; A second iron block (2346), the second iron block (2346) being connected to the middle portion of the connecting block; The second magnet (2347) is fixedly mounted inside the limiting seat (2343), and the positions of the second magnet (2347) and the second iron block (2346) correspond to each other.

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