Elevator foundation pit structure convenient to maintain and construction method thereof

Abstract

The application relates to an elevator foundation pit structure convenient for maintenance and a construction method thereof, and relates to the technical field of civil engineering. The application comprises a foundation pit main body, the inner wall of the foundation pit main body is provided with mounting plates, one of the mounting plates is provided with a mounting groove in the top wall, the surface of the mounting groove is provided with a baffle, the baffle covers the mounting groove, the inner wall of one side of the mounting groove is provided with a through hole in the direction of the inside of the foundation pit main body, the inner wall of the mounting groove is provided with a pushing air cylinder, the piston rod of the pushing air cylinder is arranged in the direction of the inside of the foundation pit main body, the end wall of the piston rod of the pushing air cylinder is provided with a hanging plate, and the side, away from the pushing air cylinder, of the hanging plate is rotationally connected with an extendable ladder. The application has the effect of improving the maintenance work efficiency, because when the components at the bottom of the foundation pit main body need to be regularly maintained, the maintenance personnel can quickly descend to the bottom of the foundation pit main body through the extendable ladder.

Description

Technical Field

[0001] This application relates to the field of civil engineering technology, and in particular to an elevator pit structure that is easy to maintain and a construction method thereof. Background Technology

[0002] With societal progress, high-rise buildings are springing up everywhere, and elevators are widely used in these structures to facilitate people's movement up and down stairs. The elevator pit is a crucial component of the elevator structure, playing a vital role in the safe operation of the elevator. It is often used to cushion the elevator car; therefore, regular maintenance of the elevator pit is necessary to ensure the safe operation of the elevator.

[0003] Regarding the aforementioned technologies, the inventors discovered that due to the different types of elevators in various buildings, there are significant differences in their weight and operating speed. Therefore, the depth of the elevator pit also varies depending on the type of elevator. Personnel maintaining the elevator pit typically need to descend to the bottom of the pit to inspect and repair it. However, for deeper elevator pits, it is not easy for maintenance personnel to descend to the bottom, requiring the use of cables, ropes, and other tools. This necessitates a significant investment of manpower and resources for preparation before the descent, and it is inconvenient for a single person to operate, resulting in inconvenience for elevator pit maintenance. Therefore, improvements are needed. Summary of the Invention

[0004] To improve the convenience of elevator pit maintenance and save manpower and resources, this application provides an elevator pit structure and its construction method that are easy to maintain.

[0005] The present application provides an elevator pit structure and construction method that are easy to maintain, using the following technical solution: An elevator pit structure that is easy to maintain includes a pit body. An installation plate is provided on the inner wall of the pit body. One of the installation plates has an installation groove on its top wall. A baffle is provided on the surface of the installation groove, and the baffle covers the installation groove. One side of the inner wall of the installation groove is opened through the pit body. A propulsion cylinder is provided on the inner wall of the installation groove. The piston rod of the propulsion cylinder is positioned facing the pit body. A hanging plate is provided on the end wall of the piston rod of the propulsion cylinder. A telescopic ladder is rotatably connected to the side of the hanging plate opposite to the propulsion cylinder.

[0006] By adopting the above technical solution, when the components at the bottom of the foundation pit need regular maintenance, maintenance personnel can open the baffle and drive the propulsion cylinder. This causes the piston rod of the drive cylinder to move the hanging plate towards the interior of the foundation pit. After the hanging plate extends out of the mounting slot, the telescopic ladder is rotated, extending its length so that the bottom of the telescopic ladder can contact the bottom wall of the foundation pit. Maintenance personnel can then descend to the bottom of the foundation pit via the telescopic ladder to maintain the components inside. This application effectively saves the time spent by maintenance personnel descending to the bottom of the foundation pit by installing a telescopic ladder. Furthermore, compared to ropes, the telescopic ladder offers better stability and safety, eliminates the need for multiple operators, reduces labor intensity, and improves labor efficiency.

[0007] Preferably, the telescopic ladder includes a plurality of first ladder frames and second ladder frames, which are spaced apart. The first ladder frame includes two first branch pipes and a first support rod disposed between the two first branch pipes. The first ladder frame of the telescopic ladder away from the bottom of the foundation pit is rotatably connected to the hanging plate. The second ladder frame includes two second branch pipes and a second support rod disposed between the two second branch pipes. A telescopic cavity is opened inside the first branch pipe. The second branch pipe passes through the end wall of the adjacent first branch pipe and is inserted into the telescopic cavity. A limiting piece is provided on the end wall of the second branch pipe located in the telescopic cavity. The limiting piece restricts the second branch pipe from leaving the telescopic cavity.

[0008] By adopting the above technical solution, after the hanging plate is extended out of the mounting slot by the drive cylinder, the first ladder frame of the telescopic ladder, which is away from the bottom of the foundation pit, rotates relative to the hanging plate. This allows the telescopic ladder to be placed vertically. Under the weight of the first and second ladder frames, they slide towards the bottom of the foundation pit. During this process, the second branch pipe moves within the telescopic cavity, thus unfolding the telescopic ladder and extending its length to the bottom of the foundation pit. This facilitates maintenance personnel to quickly descend to the bottom of the foundation pit, improving the efficiency of maintenance of the parts at the bottom of the foundation pit. It eliminates the need for maintenance personnel to carry their own lifting tools and saves time for them to enter the bottom of the foundation pit using ropes or other methods, reducing labor intensity and improving work efficiency.

[0009] Preferably, the second branch pipe includes a plug-in part, a connecting part, and a positioning part. The second support rod is connected between the two connecting parts. The plug-in part and the positioning part are respectively disposed on the end walls of the connecting parts that are opposite to each other. The plug-in part and the positioning part are both inserted into the adjacent first branch pipe. The end wall of the positioning part is provided with a plug-in hole for the plug-in part of another first branch pipe to be inserted.

[0010] By adopting the above technical solution and setting the second branch pipe in this structure, when two adjacent second branch pipes are inserted into the first branch pipe between them, the insertion part of one second branch pipe will be inserted into the insertion hole of the other second branch pipe. This can further save the volume of splicing between telescopic ladders, allowing the telescopic ladder to have a longer length and improve the applicability of the telescopic ladder.

[0011] Preferably, the telescopic ladder has two parallel fixing pipes hinged to one end away from the main body of the pit. The inner wall of the mounting groove away from the telescopic ladder has two fixing slots, and the fixing pipes and fixing slots correspond one-to-one. After the fixing pipes are rotated, they abut into the fixing slots. The inner wall of the fixing slots has a reset slot, and a reset spring is installed in the reset slot. The end of the reset spring away from the bottom wall of the reset slot is connected to a clip. The reset slot is designed in a constricted shape, and the diameter of the opening of the reset slot is smaller than the diameter of the clip. The side wall of the fixing pipe has a fixing hole for the clip to abut into. The fixing hole communicates with the inside of the fixing pipe, and an unlocking component is installed inside the fixing pipe to push the clip out of the fixing hole.

[0012] By adopting the above technical solution, when maintenance personnel unfold the telescopic ladder, they rotate the fixing tube, causing it to rotate 90° relative to the ladder and engage with the corresponding fixing groove. During this engagement, the side wall of the fixing tube abuts against the clip, pushing the clip into the reset groove. At this time, the reset spring is compressed, accumulating elastic potential energy. When the fixing tube is fully engaged in the fixing groove, the fixing hole and the reset groove are coaxial. The clip, no longer abutting against the side wall of the fixing tube, will be pushed into the fixing hole by the elastic potential energy of the reset spring, thus positioning the fixing tube. Once the fixing tube is positioned, the entire telescopic ladder's working state is further stabilized, allowing it to maintain a stable vertical position. This reduces the swaying of the telescopic ladder when maintenance personnel descend, thereby improving safety.

[0013] Preferably, the unlocking component includes an unlocking rod, a reset torsion spring, and an unlocking cam. One end of the unlocking rod is inserted into the fixed tube and is rotatably connected to the fixed tube. An unlocking knob is provided at the end of the unlocking rod extending out of the fixed tube. The reset torsion spring is sleeved on the peripheral wall of the unlocking rod inserted into the fixed tube. One end of the reset torsion spring is connected to the peripheral wall of the unlocking rod, and the other end is connected to the inner wall of the fixed tube. The unlocking cam is connected to the end of the unlocking rod away from the unlocking knob. After the unlocking cam rotates, it abuts against the latch.

[0014] By adopting the above technical solution, when the telescopic ladder needs to be retrieved, the unlocking knob is turned, which drives the unlocking rod and unlocking cam to rotate. After the unlocking cam rotates, the long end of the unlocking cam can gradually abut against the part of the clip that passes through the fixing hole. As the unlocking cam continues to rotate, the clip will eventually be pushed out of the fixing hole. At this time, the fixing tube can extend out of the fixing groove, and the connection between the fixing tube and the fixing groove is released. After unlocking is completed, the unlocking knob is released, and the unlocking rod and unlocking cam will be reset under the drive of the reset torsion spring. The unlocking component of this application has a simple structure, is easy to implement, and has high convenience and practicality.

[0015] Preferably, the first support rod on the side of the telescopic ladder away from the bottom of the foundation pit has a drive groove inside, the drive groove is connected to the telescopic cavity, a drive motor is installed in the drive groove, a winding shaft is sleeved on the peripheral wall of the output shaft of the drive motor, one end of the winding shaft extends into the telescopic cavity, a winding rope is wound around the peripheral wall of the winding shaft in the telescopic cavity, the other end of the winding rope passes through several first branch pipes and second branch pipes in sequence, and the winding rope is connected to the end of the telescopic ladder near the bottom wall of the foundation pit.

[0016] By adopting the above technical solution, when the telescopic ladder needs to be retrieved, the drive motor is started. The output shaft of the drive motor will drive the winding shaft to rotate, thereby winding the take-up rope around the circumference of the winding shaft. Through the connection between the take-up rope and the end of the telescopic ladder near the pit body, the first ladder frame and the second ladder frame are interlocked, reducing the volume of the telescopic ladder. This allows the telescopic ladder to remain retracted and be retrieved, making it easy to put into the installation slot. This saves maintenance personnel time in retrieving the telescopic ladder and improves efficiency.

[0017] Preferably, the telescopic ladder has an adjusting screw installed on the inner wall of the telescopic cavity of the first branch pipe at the end opposite to the bottom of the foundation pit. The winding shaft has an adjusting groove at the end opposite to the drive motor. The adjusting screw is inserted into the adjusting groove and threaded to the inner wall of the adjusting groove. A limit rod is connected to the side wall of the drive motor. A limit groove is provided on the inner wall of the drive groove for the limit rod to be embedded and slide. An elastic element is provided in the limit groove, and the elastic element abuts against the bottom wall of the limit groove and the limit rod.

[0018] By adopting the above technical solution, while the drive motor drives the winding shaft to rotate, the threaded connection between the adjusting screw and the winding shaft will cause the winding shaft to move along the length direction of the adjusting screw after rotation. This allows the winding rope to move along with the continuous movement of the winding shaft as it is wound around the circumference of the winding shaft, so that the winding rope can be wound in an orderly and sequential manner. This reduces the probability of the winding rope getting tangled and causing the telescopic ladder to get stuck, resulting in higher safety and practicality.

[0019] Preferably, the side wall of the hanging plate is hinged with a fixing hook, and the side wall of the hanging plate is provided with a magnetic attraction element corresponding to the fixing hook. The magnetic attraction element and the fixing hook are magnetically attracted to each other, and the fixing hooks are used to position the first branch pipe or the second branch pipe.

[0020] By adopting the above technical solution, when the telescopic ladder is not in use, rotating the fixed hook will cause the first or second branch pipe to engage between the fixed hook and the magnetic attraction component, thereby locking the telescopic ladder. This effectively reduces the probability of the telescopic ladder rotating on its own and causing damage, thus protecting the structural safety of the telescopic ladder and the main body of the foundation pit.

[0021] Preferably, both the first support rod and the second support rod have anti-slip textures on their peripheral walls.

[0022] By adopting the above technical solution, anti-slip textures are provided on the periphery of the first and second support rods. When maintenance personnel step on the first or second support rod, the friction provided by the anti-slip textures to the soles of their feet can effectively reduce the probability of slipping, thereby improving the safety of the telescopic ladder in use.

[0023] A construction method for an elevator pit structure that is easy to maintain includes the following steps: A mounting plate is fixed to the inner wall of the foundation pit, and a mounting groove is opened on the top of the mounting plate on the side near the elevator door opening; A propulsion cylinder is installed on the inner wall of the mounting groove, and a hanging plate is installed on the piston rod end wall of the propulsion cylinder. Assemble the telescopic ladder; Fixing hooks and magnetic attachments are installed on the side wall of the mounting plate; The assembled telescopic ladder is hinged to the side wall of the hanging plate, and the telescopic ladder is positioned by the fixing hook and magnetic attraction. A baffle is installed at the opening of the mounting slot, and the baffle is fixed to the mounting plate with bolts to complete the construction.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. By rotating the telescopic ladder, the bottom of the telescopic ladder can contact the bottom wall of the foundation pit, so that maintenance personnel can descend to the bottom of the foundation pit to maintain the components inside the foundation pit. This application can effectively save the time spent by maintenance personnel descending to the bottom of the foundation pit by setting up a telescopic ladder. At the same time, the descent method of the telescopic ladder has better stability and safety than ropes, and does not require multiple people to operate, reducing labor intensity and improving labor efficiency. 2. By setting fixed pipes and fixed grooves, the telescopic ladder can be positioned when it is in use, thereby improving the stability of the telescopic ladder and ensuring that maintenance personnel can maintain stability and safety when descending to the bottom of the foundation pit via the telescopic ladder; 3. By setting up a drive motor, a winding shaft, and a winding rope, when the telescopic ladder needs to be retrieved, the drive motor can drive the winding rope to be wound around the circumference of the winding shaft, thereby driving several first and second ladder frames to interlock and splice with each other. This makes the rapid retrieval of the telescopic ladder highly convenient and practical. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an elevator pit structure that is easy to maintain, according to an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of the internal structure of the mounting slot in an embodiment of this application.

[0027] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0028] Figure 4 This is a structural schematic diagram of the telescopic ladder according to an embodiment of this application.

[0029] Figure 5 This is a schematic diagram of the structure of the second ladder frame according to an embodiment of this application.

[0030] Figure 6 This is a structural schematic diagram of the fixing tube and fixing groove according to an embodiment of this application.

[0031] Figure 7 yes Figure 4 A magnified view of a section at point B in the middle.

[0032] Explanation of reference numerals in the attached drawings: 1. Main body of the foundation pit; 2. Mounting plate; 21. Mounting groove; 22. Baffle; 23. Fixing groove; 231. Reset groove; 232. Reset spring; 233. Clamp; 3. Propulsion cylinder; 31. Hanging plate; 4. Telescopic ladder; 41. First ladder frame; 411. First branch pipe; 4111. Telescopic cavity; 412. First support rod; 4121. Drive groove; 4122. Limiting groove; 42. Second ladder frame; 421. Second branch pipe; 4211. Insertion part; 42 12. Connecting part; 4213. Positioning part; 42131. Insertion hole; 422. Second support rod; 423. Limiting piece; 5. Fixing tube; 51. Fixing hole; 6. Unlocking component; 61. Unlocking rod; 611. Unlocking knob; 62. Reset torsion spring; 63. Unlocking cam; 7. Drive motor; 71. Winding shaft; 711. Adjusting groove; 72. Winding rope; 73. Adjusting screw; 74. Limiting rod; 75. Elastic component; 8. Fixing hook; 81. Magnetic component; 9. Anti-slip texture. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0034] This application discloses an elevator pit structure that facilitates maintenance. (Refer to...) Figure 1 An elevator pit structure that is easy to maintain includes a pit body 1. The four inner walls of the pit body 1 are provided with mounting plates 2. The mounting plates 2 are connected to the inner walls of the pit body 1 by anchor rods, thereby positioning the inner walls of the pit body 1 to reduce the probability of the pit body 1 collapsing and thus improve the safety of the pit body 1 during use.

[0035] Reference Figure 1 and Figure 2 A mounting groove 21 is provided on the top wall of the mounting plate 2 near the elevator door opening. The mounting groove 21 is opened through the inner wall of the side facing the pit body 1. A baffle 22 is provided on the surface of the mounting groove 21. The baffle 22 is fixed to the mounting plate 2 by bolts, etc., so that the mounting groove 21 can be hidden and the safety can be improved. In this embodiment, the baffle 22 is a plate with an L-shaped cross section, and its shape is adapted to the opening of the mounting groove 21.

[0036] Reference Figure 2 and Figure 3 An induction cylinder 3 is provided on the inner wall of the mounting groove 21 on the side away from the main body of the pit 1. The piston rod of the induction cylinder 3 moves toward the inside of the main body of the pit 1. A hanging plate 31 is welded to the end wall of the piston rod of the induction cylinder 3. The hanging plate 31 is located in the mounting groove 21. After the induction cylinder 3 is started, it drives the induction cylinder 3 to extend into the inside of the main body of the pit 1 through its piston rod.

[0037] Reference Figure 2 and Figure 3 A telescopic ladder 4 is provided on the side of the hanging plate 31 opposite to the propulsion cylinder 3. After the propulsion cylinder 3 drives the hanging plate 31 to extend above the foundation pit body 1, the telescopic ladder 4 can be deployed, allowing maintenance personnel to quickly descend to the bottom of the foundation pit body 1 to perform regular maintenance on other components inside the foundation pit body 1. This improves the problem that maintenance personnel need to bring their own lifting tools when maintaining the foundation pit body 1, which is time-consuming and labor-intensive, and thus effectively improves the efficiency of maintenance work.

[0038] Reference Figure 3 and Figure 4The telescopic ladder 4 includes several first ladder frames 41 and second ladder frames 42, which are arranged in pairs at intervals. The first ladder frame 41 includes two first branch pipes 411 and a first support rod 412 integrally formed between the two first branch pipes 411. The first ladder frame 41 is "H" shaped. The first ladder frame 41 located away from the bottom of the main body 1 of the foundation pit is rotatably connected to the hanging plate 31, so that the telescopic ladder 4 can rotate as a whole when it is not unfolded, and thus be placed into the installation groove 21. This also avoids the problem of the installation groove 21 being opened too deep, which would affect the overall strength of the installation plate 2.

[0039] Reference Figure 3 and Figure 5 The second ladder frame 42 includes two second branch pipes 421 and a second support rod 422 disposed between the two second branch pipes 421. The second ladder frame 42 is "H" shaped. The second branch pipe 421 includes an integrally formed plug part 4211, a connecting part 4212 and a positioning part 4213. The second support rod 422 is integrally formed between the two connecting parts 4212. In this embodiment, the periphery of the first support rod 412 and the second support rod 422 are provided with anti-slip textures 9. Thus, when maintenance personnel descend to the bottom of the foundation pit body 1 through the telescopic ladder 4, the anti-slip textures 9 can provide friction for the feet of maintenance personnel, thereby reducing the probability of slipping and improving safety.

[0040] Reference Figure 3 and Figure 5 The first branch pipe 411 has a telescopic cavity 4111 inside, which is opened along the length of the first branch pipe 411. The two ends of the second branch pipe 421 located between the first ladder frames 41 on both sides are respectively inserted into the telescopic cavities 4111 of the adjacent first branch pipe 411. In this embodiment, the two ends of the insertion part 4211 and the positioning part 4213 are integrally formed with limiting pieces 423. The openings of the insertion part 4211 and the positioning part 4213 inserted into the telescopic cavity 4111 are adapted to each other. The diameter of the limiting piece 423 is larger than the diameter of the corresponding inlet to prevent the second branch pipe 421 from falling out of the telescopic cavity 4111.

[0041] Reference Figure 3 and Figure 5 The positioning part 4213 has an insertion hole 42131 on its end wall for inserting the insertion part 4211 of another first branch pipe 411. When two adjacent second branch pipes 421 are inserted into the first branch pipe 411 between them, the insertion part 4211 of one second branch pipe 421 can be inserted into the insertion hole 42131 of the other second branch pipe 421. This further restricts the volume of the telescopic ladder 4 after folding, thereby increasing the overall length of the telescopic ladder 4 after unfolding and improving its applicability.

[0042] Reference Figure 3 and Figure 5 The side of the hanging plate 31 opposite to the propulsion cylinder 3 is hinged with several fixed hooks 8, which are arranged in a straight line. Several magnetic components 81 are glued to the side wall of the hanging plate 31. The magnetic components 81 and the fixed hooks 8 are arranged in a one-to-one correspondence. In this embodiment, the fixed hooks 8 are made of metal and the magnetic components 81 are magnets. The magnetic components 81 and the fixed hooks 8 are magnetically attracted. When the telescopic ladder 4 is placed in the mounting groove 21, by rotating the fixed hooks 8, the first branch pipe 411 or the second branch pipe 421 of the telescopic ladder 4 can be located inside the arc-shaped structure of the fixed hooks 8, thereby realizing the positioning of the telescopic ladder 4, reducing the probability of the telescopic ladder 4 rotating on its own and causing damage to the structure of the telescopic ladder 4, and extending its service life.

[0043] Reference Figure 2 and Figure 3 The first branch pipe 411 located at the end of the telescopic ladder 4 away from the foundation pit body 1 is hinged with a fixed pipe 5. The two fixed pipes 5 are parallel to each other and can rotate towards the mounting groove 21 away from the interior of the foundation pit body 1. The inner wall of the mounting groove 21 away from the telescopic ladder 4 is provided with two fixed grooves 23 by welding. The fixed pipes 5 and the fixed grooves 23 are provided one-to-one. In this embodiment, the fixed groove 23 is a square tube with the opening on the upper surface. After the fixed pipe 5 is rotated, it can be inserted into the fixed groove 23. The fixed pipe 5 and the inner wall of the fixed groove 23 are adapted to each other.

[0044] Reference Figure 3 and Figure 6Both sides of the inner wall of the fixing groove 23 are provided with reset grooves 231. In this embodiment, the reset grooves 231 are constricted, and the opening diameter of the reset grooves 231 gradually increases from the end near the fixing tube 5 to the end away from the fixing tube 5. A reset spring 232 is glued to the bottom wall of the reset groove 231. A clip 233 is glued to the end of the reset spring 232 away from the bottom wall of the reset groove 231. The clip 233 is spherical, and its diameter is larger than the opening diameter of the reset groove 231, thereby effectively preventing the clip 233 from detaching from the reset groove 231. The reset spring 232 drives the clip 233 to move outward from the reset groove 231. The side wall of the fixing tube 5 is provided with a... The clip 233 abuts into the fixing hole 51, which is connected to the inside of the fixing tube 5. During the process of inserting the fixing tube 5 into the fixing groove 23, the outer wall of the fixing tube 5 abuts against the clip 233, causing the clip 233 to be pushed into the reset groove 231. The reset spring 232 accumulates elastic potential energy until the fixing tube 5 is fully embedded. After the reset groove 231 and the fixing hole 51 are coaxial, the clip 233 will be driven by the reset spring 232 to abut into the inside of the fixing hole 51, completing the locking of the fixing groove 23 and the fixing tube 5. This reduces the relative sway of the telescopic ladder 4, so that when maintenance personnel descend to the bottom of the foundation pit body 1 through the telescopic ladder 4, the telescopic ladder 4 can maintain relative stability and improve safety.

[0045] Reference Figure 3 and Figure 6 The fixed tube 5 is equipped with an unlocking component 6, which includes an unlocking rod 61, a return torsion spring 62, and an unlocking cam 63. One end of the unlocking rod 61 passes through the top wall of the fixed tube 5 and is inserted into the interior of the fixed tube 5. The other end of the unlocking rod 61 located outside the fixed tube 5 has an integrally formed unlocking knob 611 to prevent the unlocking rod 61 from falling into the interior of the fixed tube 5. The unlocking knob 611 abuts against the top wall of the fixed tube 5. By rotating the unlocking knob 611, the unlocking rod 61 can be rotated. The return torsion spring 62 is sleeved on the circumferential wall of the fixed tube 5 where the unlocking rod 61 is inserted. One end of lever 62 is connected to the peripheral wall of unlocking rod 61 by adhesive, and the other end of lever 62 is connected to the inner wall of fixing tube 5 by adhesive. When unlocking rod 61 is rotated, the reset torsion spring 62 will drive unlocking rod 61 to reset from the unlocking knob 611. Unlocking cam 63 is connected to the end of unlocking rod 61 away from unlocking knob 611. When unlocking rod 61 is rotated, the long end of unlocking cam 63 rotates and abuts against clip 233, thereby pushing clip 233 out of fixing hole 51, thus quickly separating fixing tube 5 from fixing groove 23. The structure is simple and easy to implement.

[0046] Reference Figure 4 and Figure 7A drive groove 4121 is provided inside the first support rod 412 on the side opposite to the bottom of the main body 1 of the foundation pit. The length direction of the drive groove 4121 is consistent with the length direction of the first support rod 412. The drive groove 4121 is connected to the telescopic grooves on both sides. Two drive motors 7 are installed inside the drive groove 4121. The drive motors 7 are arranged one-to-one with the first branch pipe 411. The output shaft of the drive motor 7 is oriented towards the corresponding telescopic cavity 4111. Two limiting rods 7 are welded to the side wall of the drive motor 7. 4. The length direction of the limiting rod 74 is perpendicular to the length direction of the drive groove 4121. The inner wall of the drive groove 4121 is provided with a plurality of limiting grooves 4122 for the limiting rod 74 to be embedded and slide. In this embodiment, the limiting groove 4122 is a dovetail groove, which can restrict the limiting rod 74 from falling out of it. The length direction of the limiting groove 4122 is consistent with the length direction of the drive groove 4121, so that the drive motor 7 can slide in the drive groove 4121 by sliding the limiting rod 74 in the limiting groove 4122.

[0047] Reference Figure 4 and Figure 7 An elastic element 75 is provided in the limiting groove 4122. In this embodiment, the elastic element 75 is a spring. One end of the elastic element 75 is connected to the bottom wall of the limiting groove 4122 by adhesive, and the other end is connected to the side wall of the limiting rod 74 by adhesive. This allows the elastic element 75 to provide a reset or movement force for the drive motor 7 when it is stretched.

[0048] Reference Figure 4 and Figure 7 The output shaft of the drive motor 7 is connected to a winding shaft 71 via a key. One end of the winding shaft 71 extends into the telescopic cavity 4111. A winding rope 72 is wound around the peripheral wall of the winding shaft 71 within the telescopic cavity 4111. One end of the winding rope 72 is connected to the winding shaft 71 by adhesive, and the other end passes through several first branch pipes 411 and second branch pipes 421 in sequence, and is connected to the end of the telescopic ladder 4 closest to the bottom of the pit body 1. After the drive motor 7 drives the winding shaft 71 to rotate, the winding rope 72 will be wound around the winding shaft 71, thereby driving the telescopic ladder 4 to retract and achieve rapid retrieval of the telescopic ladder 4.

[0049] Reference Figure 4 and Figure 7 An adjusting screw 73 is provided on the inner wall of the telescopic cavity 4111. The length direction of the adjusting screw 73 is consistent with the length direction of the drive groove 4121. An adjusting groove 711 is provided at the end of the winding shaft 71 away from the drive motor 7. The adjusting screw 73 is inserted into the adjusting groove 711 and threadedly connected to the inner wall of the adjusting groove 711. This allows the adjusting screw 73 to move along the length direction of the winding shaft 73 while the winding shaft 71 rotates, so that the winding rope 72 can be evenly wound around the circumference of the winding shaft 71, reducing the probability of the winding rope 72 getting tangled and thus improving its safety in use.

[0050] The implementation principle of an elevator pit structure that facilitates maintenance according to an embodiment of this application is as follows: When the internal components of the pit body 1 require regular maintenance, the baffle 22 is opened, the propulsion cylinder 3 is started, so that the hanging plate 31 can drive the telescopic ladder 4 to move above the pit body 1; the fixed hook 8 is rotated to release the positioning of the telescopic ladder 4, the telescopic ladder 4 is rotated so that the telescopic ladder 4 can be set vertically, the drive motor 7 is started to unwind the winding rope 72, and the telescopic ladder 4 can extend towards the bottom of the pit body 1 under its own weight, so that maintenance personnel can descend to the bottom of the pit body 1 through the telescopic ladder 4, thereby achieving quick and convenient maintenance of the pit body 1.

[0051] Once maintenance is complete, staff return to the ground via telescopic ladder 4, restart drive motor 7, and retrieve telescopic ladder 4. After retrieval, telescopic ladder 4 is rotated and positioned using fixing hook 8 and magnetic suction component 81. After positioning, push cylinder 3 drives hanging plate 31 back into mounting slot 21, and baffle 22 is re-fixed, completing the maintenance work.

[0052] This application also discloses a construction method for an elevator pit structure that is easy to maintain, including the following steps: S1: Fix the mounting plate 2 on the inner wall of the pit body 1, and open the mounting groove 21 on the top of the mounting plate 2 on the side near the elevator door opening; S2: Install the propulsion cylinder 3 on the inner wall of the mounting groove 21, and install the hanging plate 31 on the piston rod end wall of the propulsion cylinder 3; S3: Assemble the telescopic ladder 4; S4: Install fixing hooks 8 and magnetic suction components 81 on the side wall of the mounting plate 31; S5: Hinge the assembled telescopic ladder 4 to the side wall of the hanging plate 31, and position the telescopic ladder 4 using the fixing hook 8 and the magnetic suction piece 81. S6: Install a baffle 22 at the opening of the mounting slot 21 and fix the baffle 22 to the mounting plate 2 with bolts to complete the construction.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An elevator pit structure that is easy to maintain, characterized in that: The structure includes a pit body (1), and an installation plate (2) is provided on the inner wall of the pit body (1). One of the installation plates (2) has an installation groove (21) on its top wall. A baffle (22) is provided on the surface of the installation groove (21) and covers the installation groove (21). One side of the inner wall of the installation groove (21) is opened through the pit body (1). A propulsion cylinder (3) is provided on the inner wall of the installation groove (21). The piston rod of the propulsion cylinder (3) is arranged in the direction of the pit body (1). A hanging plate (31) is provided on the end wall of the piston rod of the propulsion cylinder (3). A telescopic ladder (4) is rotatably connected to the side of the hanging plate (31) away from the propulsion cylinder (3). The telescopic ladder (4) includes several first ladder frames (41) and second ladder frames (42), which are spaced apart. The first ladder frame (41) includes two first branch pipes (411) and a first support rod (412) disposed between the two first branch pipes (411). The first ladder frame (41) of the telescopic ladder (4) facing away from the bottom of the pit body (1) is rotatably connected to the hanging plate (31). The second ladder frame (42) includes two second branch pipes (421). The first branch pipe (411) has a telescopic cavity (4111) inside. The second branch pipe (421) passes through the end wall of the adjacent first branch pipe (411) and is inserted into the telescopic cavity (4111). The end wall of the second branch pipe (421) located in the telescopic cavity (4111) is provided with a limiting piece (423). The limiting piece (423) restricts the second branch pipe (421) from leaving the telescopic cavity (4111). The second branch pipe (421) includes a plug-in part (4211), a connecting part (4212) and a positioning part (4213). The second support rod (422) is connected between the two connecting parts (4212). The plug-in part (4211) and the positioning part (4213) are respectively provided on the end walls of the connecting part (4212) that are opposite to each other. The plug-in part (4211) and the positioning part (4213) are both inserted into the adjacent first branch pipe (411). The end wall of the positioning part (4213) is provided with a plug-in hole (42131) for the plug-in part (4211) of another first branch pipe (411) to be inserted. The telescopic ladder (4) has two parallel fixed pipes (5) hinged to one end away from the pit body (1). The mounting groove (21) has two fixed grooves (23) on its inner wall away from the telescopic ladder (4). The fixed pipes (5) and fixed grooves (23) correspond one-to-one. After rotation, the fixed pipes (5) abut into the fixed grooves (23). A reset groove (231) is provided on the inner wall of the fixed groove (23), and a reset spring (232) is installed in the reset groove (231). (232) A clip (233) is connected to one end away from the bottom wall of the reset groove (231). The reset groove (231) is set in a constricted shape. The diameter of the opening of the reset groove (231) is smaller than the diameter of the clip (233). A fixing hole (51) is opened on the side wall of the fixing tube (5) for the clip (233) to be inserted. The fixing hole (51) is connected to the inside of the fixing tube (5). An unlocking component (6) is provided inside the fixing tube (5) for pushing the clip (233) out of the fixing hole (51).

2. The elevator pit structure for easy maintenance according to claim 1, characterized in that: The unlocking component (6) includes an unlocking rod (61), a reset torsion spring (62), and an unlocking cam (63). One end of the unlocking rod (61) is inserted into the fixed tube (5), and the unlocking rod (61) is rotatably connected to the fixed tube (5). An unlocking knob (611) is provided at the end of the unlocking rod (61) that extends out of the fixed tube (5). The reset torsion spring (62) is sleeved on the periphery of the unlocking rod (61) that is inserted into the fixed tube (5). One end of the reset torsion spring (62) is connected to the periphery of the unlocking rod (61), and the other end is connected to the inner wall of the fixed tube (5). The unlocking cam (63) is connected to the end of the unlocking rod (61) that is away from the unlocking knob (611). After the unlocking cam (63) rotates, it abuts against the clip (233).

3. The elevator pit structure for easy maintenance according to claim 1, characterized in that: The telescopic ladder (4) has a drive groove (4121) inside the first support rod (412) on the side away from the bottom of the foundation pit body (1). The drive groove (4121) is connected to the telescopic cavity (4111). A drive motor (7) is installed in the drive groove (4121). A winding shaft (71) is sleeved on the peripheral wall of the output shaft of the drive motor (7). One end of the winding shaft (71) extends into the telescopic cavity (4111). A winding rope (72) is wound around the peripheral wall of the winding shaft (71) in the telescopic cavity (4111). The other end of the winding rope (72) passes through several first branch pipes (411) and second branch pipes (421) in sequence. The winding rope (72) is connected to the end of the telescopic ladder (4) near the bottom wall of the foundation pit body (1).

4. The elevator pit structure for easy maintenance according to claim 3, characterized in that: An adjusting screw (73) is provided on the inner wall of the telescopic cavity (4111) of the first branch pipe (411) at the bottom of the main body of the pit (1) of the telescopic ladder (4). An adjusting groove (711) is provided on the end of the winding shaft (71) away from the drive motor (7). The adjusting screw (73) is inserted into the adjusting groove (711) and threadedly connected to the inner wall of the adjusting groove (711). A limiting rod (74) is connected to the side wall of the drive motor (7). A limiting groove (4122) is provided on the inner wall of the drive groove (4121) for the limiting rod (74) to be embedded and slide. An elastic element (75) is provided in the limiting groove (4122). The elastic element (75) abuts against the bottom wall of the limiting groove (4122) and the limiting rod (74).

5. The elevator pit structure for easy maintenance according to claim 1, characterized in that: The side wall of the hanging plate (31) is hinged with a fixing hook (8), and the side wall of the hanging plate (31) is provided with a magnetic suction element (81) corresponding to the fixing hook (8). The magnetic suction element (81) and the fixing hook (8) are magnetically attracted to each other. Several fixing hooks (8) are used to position the first branch pipe (411) or the second branch pipe (421).

6. The elevator pit structure for easy maintenance according to claim 1, characterized in that: The first support rod (412) and the second support rod (422) are both provided with anti-slip textures (9) on their peripheral walls.

7. The construction method for an elevator pit structure that is easy to maintain according to claim 1, characterized in that: Includes the following steps, A mounting plate (2) is fixed to the inner wall of the pit body (1), and a mounting groove (21) is opened on the top of the mounting plate (2) on the side near the elevator door opening; A propulsion cylinder (3) is installed on the inner wall of the mounting groove (21), and a hanging plate (31) is installed on the piston rod end wall of the propulsion cylinder (3); Assemble the telescopic ladder (4); A fixing hook (8) and a magnetic suction element (81) are installed on the side wall of the hanging plate (31); The assembled telescopic ladder (4) is hinged to the side wall of the hanging plate (31), and the telescopic ladder (4) is positioned by the fixing hook (8) and the magnetic suction (81); A baffle (22) is installed at the opening of the mounting groove (21), and the baffle (22) is fixed to the mounting plate (2) by bolts to complete the construction.

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