A foundation pit settlement point protection box device for construction engineering surveying

Abstract

The utility model belongs to building engineering foundation pit settlement measurement technical field especially for a kind of foundation pit settlement point protection box device in building engineering measurement, including protection box body and box cover, further include sealing element, automatic locking mechanism and elastic return piece;The protection box body includes protection box outer ring and protection box inner ring;Automatic locking mechanism is located between the protection box outer ring and the box cover;Elastic return piece is located between the box cover and the protection box outer ring;The sealing performance after the box cover is closed is improved by sealing element, rainwater, silt can be effectively blocked to infiltrate, avoid measuring bolt corrosion or burying;The stability after the box cover is closed is ensured by automatic locking mechanism, without external tool, just need to pull force lever to complete unlocking, avoid the damage of box cover due to pry, prolong service life;Further protection to measuring bolt can be carried out by bottom support, the stability and security of measuring bolt are improved, and bottom support is adopted screw connection, it is favorable to disassembly replacement.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit settlement measurement technology in building engineering, and specifically relates to a foundation pit settlement point protection box device used in building engineering measurement. Background Technology

[0002] During the construction and operation phases of building projects, foundation pit settlement monitoring is a crucial step in assessing the structural stability of the project, and the measurement accuracy of settlement monitoring points directly affects the assessment of project safety.

[0003] As a core protective component, the settlement observation point protection box mainly functions to prevent the measuring plug from being buried by silt, eroded by rainwater, or affected by external impacts through physical isolation and warning markings. Common materials include cast iron (high durability), stainless steel (corrosion resistant), or engineering plastics (lightweight).

[0004] Currently, the common settlement observation point protection boxes on the market mainly consist of a cylindrical or box-shaped protection box body (1) and a box cover (2) pivotally connected to the top of the protection box body (1). They have the following problems: 1. Poor sealing performance, mud and sand easily flow into the protection box body (1) and bury the measuring plug. It is necessary to manually clean out the mud and sand before measurement can be carried out, which is quite troublesome; 2. The box cover (2) is not easy to open. It usually requires the use of tools to pry open the box cover (2). Long-term operation can easily damage the box cover (2) and affect the protective performance.

[0005] Therefore, it is necessary to design a settlement observation point protection box that is easy to open and has good sealing performance.

[0006] To address the aforementioned issues, this application proposes a foundation pit settlement point protection box device for use in building engineering surveying. Utility Model Content

[0007] To address the aforementioned problems in the existing technology, this utility model provides a foundation pit settlement point protection box device for construction engineering surveying, which is convenient to use, easy to open, and has good sealing performance.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a protective box device for foundation pit settlement points in building engineering surveying, comprising a protective box body and a box cover rotatably connected to the protective box body, and further comprising a sealing element, an automatic locking mechanism and a spring-loaded reset element;

[0009] The protective box body includes an outer protective box ring and an inner protective box ring that are integrally formed. There is a receiving groove between the top of the inner protective box ring and the top of the outer protective box ring for accommodating the box cover. The sealing element is disposed in the receiving groove.

[0010] The automatic locking mechanism is located between the outer ring of the protective box and the box cover. It includes a fixing block fixed to the box cover, a movable plate movably connected to the outer ring of the protective box, and a return spring for moving the movable plate toward the fixing block. The end of the fixing block is provided with a slot for the movable plate to be inserted into. The top of the movable plate is fixed with a locking block that cooperates with the fixing block, and the top surface of the locking block is a slope.

[0011] The elastic reset element is located between the box cover and the outer ring of the protective box, and is used to automatically pop open the box cover after the automatic locking mechanism is released.

[0012] Preferably, the automatic locking mechanism further includes a mounting box and a guide rod;

[0013] The mounting box is fixed to the top of the outer side wall of the outer ring of the protective box, and the movable plate is partially embedded in the mounting box;

[0014] The guide rod is fixed inside the mounting box and passes through the moving plate. The reset spring is sleeved on the guide rod and is located between the inner wall of the mounting box and the moving plate.

[0015] Preferably, a force-applying rod is fixed to the outer wall of the movable plate.

[0016] Preferably, a sealing plate is fixed to the outer wall of the movable plate, and the bottom surface of the sealing plate is in contact with the top surface of the mounting box.

[0017] Preferably, the automatic locking mechanism is symmetrically distributed in two sets.

[0018] Preferably, it also includes a mounting shaft;

[0019] A connecting block is fixed on the box cover, and a mounting groove is provided at the top of the outer ring of the protective box. The connecting block is rotatably mounted in the mounting groove by means of a mounting shaft.

[0020] The elastic reset component is a torsion spring, which is sleeved on the mounting shaft. One end of the elastic reset component is connected to the connecting block, and the other end is connected to the outer ring of the protective box.

[0021] Preferably, an arc-shaped protective plate is fixed to the outer wall of the connecting block.

[0022] Preferably, the sealing element includes a rubber sealing ring and a rubber protrusion ring fixed to the top of the inner side of the rubber sealing ring.

[0023] Preferably, it also includes a base;

[0024] The base is detachably installed at the bottom of the protective box body, and a through hole is provided on the base for the measuring bolt to pass through.

[0025] Preferably, the inner wall of the inner ring of the protective box is provided with an internal thread, the outer wall of the base is provided with an external thread, and the base is provided at the bottom end of the protective box body by means of thread engagement; the outer wall of the base is provided with an anti-slip groove.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] 1. The sealing performance after the box cover is closed is improved by the sealing component. The sealing component adopts the interference fit design of "rubber sealing ring + rubber convex ring" to form a double sealing structure, which can effectively block rainwater and mud from seeping in, avoid corrosion or burial of the measuring plug, reduce cleaning workload, and ensure measurement accuracy.

[0028] 2. The automatic locking mechanism ensures the stability of the lid after it is closed. No external tools are required; simply pull the lever to unlock. The spring-loaded reset mechanism enables the lid to automatically pop open, making the operation simple and quick. This prevents the lid from being damaged by prying and extends its service life.

[0029] 3. The base (with through holes) provides further protection for the measuring plug, improving its stability and safety. The threaded connection of the base facilitates disassembly and replacement.

[0030] Other additional advantages and benefits of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 A schematic diagram of the isometric structure of the settlement observation point protection box in the existing technology;

[0033] Figure 2 This is an exploded structural diagram of the settlement observation point protection box in this utility model;

[0034] Figure 3 This is an isometric structural diagram of the settlement observation point protection box in the closed state in this utility model;

[0035] Figure 4 This is an isometric structural diagram of the automatic locking mechanism in this utility model;

[0036] Figure 5 This is a schematic diagram of the isometric structure of the elastic component in this utility model;

[0037] Figure 6This is a schematic diagram of the isometric structure of the sealing element in this utility model.

[0038] In the diagram: 1. Protective box body; 11. Protective box outer ring; 111. Mounting groove; 12. Protective box inner ring; 121. Internal thread; 13. Receiving groove; 2. Box cover; 21. Connecting block; 211. Arc-shaped protective plate; 3. Sealing element; 31. Rubber sealing ring; 32. Rubber convex ring; 4. Base support; 41. Through hole; 42. External thread; 43. Anti-slip groove; 5. Automatic locking mechanism; 51. Fixing block; 511. Slot; 52. Mounting box; 53. Moving plate; 54. Locking block; 55. Guide rod; 56. Return spring; 57. Force rod; 58. Sealing plate; 6. Mounting shaft; 7. Spring return element. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Please see Figures 2-6 The present invention provides the following technical solution: a protective box device for foundation pit settlement point in building engineering surveying, including a protective box body 1 and a box cover 2 rotatably connected to the protective box body 1, and also including a sealing element 3, an automatic locking mechanism 5 and an elastic reset element 7.

[0041] Furthermore, by Figures 2-5As shown, in this embodiment, the protective box body 1 includes an outer protective box ring 11 and an inner protective box ring 12 that are integrally formed. A receiving groove 13 for accommodating the box cover 2 is provided between the top of the inner protective box ring 12 and the top of the outer protective box ring 11. A sealing member 3 is disposed within the receiving groove 13. An automatic locking mechanism 5 is disposed between the outer protective box ring 11 and the box cover 2. It includes a fixing block 51 fixed to the box cover 2, a movable plate 53 movably connected to the outer protective box ring 11, and a return spring 56 for moving the movable plate 53 toward the fixing block 51. The end of the fixing block 51 is provided with a slot 511 for the movable plate 53 to be inserted into. The top of the movable plate 53 is fixed with a locking block 54 that cooperates with the fixing block 51, and the top surface of the locking block 54 is inclined. A spring-loaded reset member 7 is disposed between the box cover 2 and the outer protective box ring 11, used to release the automatic locking mechanism 5. After the box cover 2 automatically pops open, with the above scheme, when in use, the protective box body 1 is buried in the foundation pit settlement observation point, and the measuring bolt is inserted into the interior of the protective box body 1 from the bottom end; when it is necessary to protect the foundation pit settlement point, the staff rotates the box cover 2 towards the protective box body 1, so that the box cover 2 is gradually embedded in the receiving groove 13 between the inner ring 12 and the outer ring 11 of the protective box. During this process, the elastic reset component 7 undergoes elastic deformation to store elastic potential energy. The fixing block 51 on the box cover 2 moves down synchronously with the box cover 2. The end of the fixing block 51 contacts the locking block 54 at the top of the moving plate 53. Since the top surface of the locking block 54 is inclined, the fixing block 51 generates a lateral thrust on the inclined surface when it moves down, pushing the moving plate 53 to move away from the fixing block 51. At the same time, the moving plate 53 compresses the reset spring 56, so that the reset spring 56 stores elastic potential energy.

[0042] When the lid 2 is fully closed into the receiving groove 13, the slot 511 on the fixing block 51 corresponds exactly to the position of the locking block 54. At this time, the lateral pushing force of the fixing block 51 on the locking block 54 disappears, the return spring 56 releases its elastic potential energy, and pushes the moving plate 53 to return to the position closer to the fixing block 51, so that the locking block 54 is accurately embedded in the slot 511 of the fixing block 51. The automatic locking mechanism 5 locks the lid 2 and the protective box body 1. At the same time, the sealing element 3 in the receiving groove 13 is squeezed and deformed by the lid 2 and the groove wall of the receiving groove 13, tightly filling the gap between the two, playing a waterproof and dustproof sealing role, and preventing external impurities from entering the interior of the protective box body 1 and damaging the settlement point measuring plug.

[0043] In daily use, the locked cover 2 and the seal 3 together protect the settlement point measuring plug from rain, dust accumulation and external impact, ensuring that the measurement accuracy of the settlement point is not affected by the external environment.

[0044] When it is necessary to measure the settlement point of the foundation pit, the staff pulls the moving plate 53 away from the fixed block 51. The moving plate 53 compresses the reset spring 56, which drives the locking block 54 to disengage from the slot 511. The locking state of the automatic locking mechanism 5 is released. At this time, the elastic reset component 7 releases elastic potential energy and generates an upward pushing force on the cover 2, causing the cover 2 to automatically rotate upward around the rotation connection point with the protective box body 1, thereby popping open the cover 2 and exposing the settlement point measuring plug inside the protective box, which makes it convenient for the staff to use a measuring ruler to connect the measuring plug to collect settlement data.

[0045] After the measurement is completed, the staff will rotate the cover 2 towards the receiving groove 13 again and repeat the locking process to put the device back into the protection state, ready for the next measurement.

[0046] Optionally, by Figures 2-4 As shown, in this embodiment, the automatic locking mechanism 5 also includes a mounting box 52 and a guide rod 55; the mounting box 52 is fixed to the top of the outer wall of the outer ring 11 of the protective box, and the movable plate 53 is partially embedded in the mounting box 52; the guide rod 55 is fixed in the mounting box 52 and passes through the movable plate 53, and the reset spring 56 is sleeved on the guide rod 55 and is located between the inner wall of the mounting box 52 and the movable plate 53. With the above solution, during use, in the operation of the automatic locking mechanism 5, the mounting box 52 provides a stable mounting space and protection for the movable plate 53, the guide rod 55 and the reset spring 56. It is fixed to the top of the outer wall of the outer ring 11 of the protective box, so that the entire automatic locking mechanism 5 and the protective box body 1 form a stable connection, while avoiding damage to the internal components caused by external bumps.

[0047] When the lid 2 is closed, the fixed block 51 pushes the locking block 54 to move the moving plate 53. The guide rod 55 plays a key guiding role, so that the moving plate 53 can only slide smoothly along the axis of the guide rod 55. This effectively prevents the moving plate 53 from shifting, tilting or getting stuck during the force process, and ensures that the locking block 54 can be accurately aligned with the slot 511 of the fixed block 51.

[0048] Meanwhile, the return spring 56, which is sleeved on the guide rod 55, has its extension and retraction movement limited to the extension direction of the guide rod 55. This prevents the return spring 56 from twisting or deforming due to lateral force, ensuring that the return spring 56 can stably store and release elastic potential energy. When unlocking is required, the operator pulls the moving plate 53, which moves along the guide rod 55 away from the fixed block 51. The return spring 56 is uniformly compressed under the constraint of the guide rod 55. When locking, the elastic force of the return spring 56 can also smoothly push the moving plate 53 to reset through the guiding action of the guide rod 55, so that the locking block 54 can be accurately embedded in the slot 511, further improving the operational stability and locking reliability of the automatic locking mechanism 5.

[0049] Preferably, by Figures 2-4 As shown in this embodiment, a force-applying rod 57 is fixed to the outer wall of the movable plate 53. With the above solution, the design of the force-applying rod 57 provides a convenient and clear force application point for the staff to unlock the automatic locking mechanism 5. When unlocking is required, the staff does not need to search for the position of the movable plate 53. They can simply apply force to the force-applying rod 57 to pull the movable plate 53 to slide along the guide rod 55, which effectively simplifies the operation process and improves the unlocking efficiency.

[0050] Preferably, by Figures 2-4 As shown in this embodiment, a sealing plate 58 is fixed to the outer wall of the movable plate 53, and the bottom surface of the sealing plate 58 is attached to the top surface of the mounting box 52. With the above solution, when in use, the bottom surface of the sealing plate 58 is attached to the top surface of the mounting box 52, which can form a tight physical barrier between the two, effectively preventing dust, rainwater, mud and other impurities from the construction site from entering the interior of the mounting box 52.

[0051] Meanwhile, regardless of whether the moving plate 53 is in the locked state (reset spring 56 extended) or the unlocked state (reset spring 56 compressed), the sealing plate 58 will move synchronously with the moving plate 53, always maintaining a tight seal with the top surface of the mounting box 52, forming a dynamic sealing effect. This further improves the reliability of protection for the internal components of the mounting box 52, reduces malfunctions caused by impurities, extends the service life of the device, and reduces maintenance costs.

[0052] Preferably, by Figures 2-4 As shown in this embodiment, there are two sets of automatic locking mechanisms 5 symmetrically distributed. After adopting the above scheme, the primary advantage in use is to achieve force balance when the lid 2 is locked. The two sets of mechanisms apply locking force to the fixing block 51 of the lid 2 from both sides of the outer ring 11 of the protective box, so that the force on the lid 2 in the receiving groove 13 is evenly distributed on both sides, avoiding the lid 2 from tilting or shifting due to locking on one side, ensuring that the lid 2 is tightly fitted with the groove wall of the receiving groove 13 and the sealing element 3, reducing the sealing gap caused by uneven force on one side, and further improving the sealing reliability of waterproof and dustproof.

[0053] Secondly, the two sets of symmetrical automatic locking mechanisms 5 form a double locking guarantee, which significantly improves the locking stability of the cover 2. When there may be external force collisions, vibrations, etc. at the engineering site, if one set of automatic locking mechanisms 5 is at risk of loosening due to accidental force, the other set of automatic locking mechanisms 5 can still maintain the locked state, effectively preventing the cover 2 from accidentally popping open and causing the settlement point to be exposed and damaged. This enhances the protection and fault tolerance of the device under complex working conditions and reduces the probability of the settlement point being disturbed by external factors.

[0054] Optionally, by Figure 2 , Figure 3 and Figure 5As shown, this embodiment also includes a mounting shaft 6; a connecting block 21 is fixed on the cover 2, and a mounting groove 111 is provided at the top of the outer ring 11 of the protective box. The connecting block 21 is rotatably mounted in the mounting groove 111 by the mounting shaft 6; the elastic reset member 7 is a torsion spring, which is sleeved on the mounting shaft 6, and one end of the elastic reset member 7 is connected to the connecting block 21 and the other end is connected to the outer ring 11 of the protective box. With the above scheme, when in use, the mounting shaft 6 serves as the rotation fulcrum of the cover 2. It passes through the connecting block 21 and is fixed in the mounting groove 111 of the outer ring 11 of the protective box, so that the connecting block 21 can rotate stably around the mounting shaft 6 in the mounting groove 111, thereby driving the cover 2 to achieve the rotational movement of closing and opening.

[0055] The mounting groove 111 provides lateral restraint to the connecting block 21, preventing the lid 2 from shifting left or right when rotating, ensuring that the lid 2 can be accurately inserted into the receiving groove 13 or smoothly pop open, thus improving the stability of the rotation process.

[0056] When the cover 2 is closed, the cover 2 rotates around the mounting shaft 6 toward the protective box body 1. The connecting block 21 rotates synchronously with the cover 2. At this time, the torsion spring (elastic reset component 7) sleeved on the mounting shaft 6 is torsionally deformed. One end rotates with the connecting block 21, and the other end is fixed to the outer ring 11 of the protective box, thereby storing elastic potential energy. After the automatic locking mechanism 5 completes the locking, the torsion spring remains in a torsional state, storing power for the automatic opening of the cover 2.

[0057] When the automatic locking mechanism 5 is released, the torsion spring releases its stored elastic potential energy, generating a reverse torsional force that drives the connecting block 21 to rotate in the opposite direction around the mounting shaft 6, thereby driving the lid 2 to automatically flip upward with the mounting shaft 6 as the fulcrum, thus enabling the lid 2 to pop open quickly.

[0058] Preferably, by Figure 2 , Figure 3 and Figure 5 As shown in this embodiment, an arc-shaped protective plate 211 is fixed on the outer wall of the connecting block 21. After adopting the above solution, during use, dust, mud, rainwater and other impurities at the construction site are likely to enter the gap between the mounting groove 111 and the connecting block 21. If they accumulate for a long time, they will wear down the rotating contact surface between the connecting block 21 and the mounting shaft 6, and may even cause the connecting block 21 to rotate and get stuck, affecting the smooth opening and closing of the cover 2.

[0059] The arc-shaped protective plate 211 fits against the outer wall of the connecting block 21, and its arc-shaped trajectory is adapted to the rotation trajectory of the connecting block 21 around the mounting shaft 6. It can always block the outer opening of the mounting groove 111 during the entire rotation of the cover 2, effectively preventing impurities from entering the interior of the mounting groove 111, avoiding wear or jamming of the rotating structure due to impurities, and ensuring the flexibility and stability of the connecting block 21 rotating around the mounting shaft 6.

[0060] Optionally, by Figure 2 and Figure 6 As shown in this embodiment, the sealing element 3 includes a rubber sealing ring 31 and a rubber protruding ring 32 fixed to the top of the inner side of the rubber sealing ring 31. With the above solution, when in use, the rubber sealing ring 31 in the sealing element 3 serves as the basic sealing structure. Its annular design can completely fit the groove wall of the receiving groove 13 and the edge of the box cover 2. When the box cover 2 is locked, the basic gap between the two is filled by the squeezing of the rubber sealing ring 31 by the box cover 2, forming the first waterproof and dustproof barrier, effectively blocking most external impurities and moisture from entering the interior of the protective box body 1, and providing basic protection for the settling point.

[0061] The rubber protruding ring 32 further enhances the sealing reliability. Because the rubber protruding ring 32 is convex, during the closing process of the lid 2, the bottom surface of the lid 2 will preferentially contact the rubber protruding ring 32 and apply pressure, causing the rubber protruding ring 32 to produce more concentrated deformation. Compared with the flat surface of the sealing element 3, the contact area of ​​the rubber protruding ring 32 is smaller, and it can generate greater contact pressure under the same locking pressure, thereby more tightly fitting the connection between the bottom surface of the lid 2 and the inner side of the sealing element 3, forming a second sealing line of defense. It can specifically block the trace amounts of rainwater or dust that seep into the gap between the lid 2 and the edge of the rubber sealing ring 31, and prevent them from sliding down the inner side of the rubber sealing ring 31 into the interior of the protective box body 1.

[0062] Preferably, by Figure 2 As shown, this embodiment also includes a base 4; the base 4 is detachably installed at the bottom of the protective box body 1, and a through hole 41 for the measuring plug to pass through is provided on the base 4. With the above solution, during use, the through hole 41 on the base 4 for the measuring plug to pass through plays a role in precise positioning and limiting. During installation, the through hole 41 can be used as a positioning reference to guide the measuring plug to pass smoothly through the base 4, ensuring the coaxiality of the protective box body 1 and the measuring plug, avoiding the installation offset of the protective box body 1 from obstructing the measuring plug, and ensuring that the subsequent measuring instruments can accurately connect to the measuring plug for data acquisition; during use, the through hole 41 forms a lateral constraint on the measuring plug, reducing the shaking of the measuring plug caused by external collisions and vibrations, and preventing the positional displacement of the measuring plug from affecting the accuracy of the settlement data.

[0063] In addition, the presence of the through hole 41 allows the measuring plug and the base 4 to form a "through" fit. The base 4 provides stable support for the protective box body 1 without obstructing the measuring end of the measuring plug, ensuring that the instrument can directly contact the measuring plug through the inside of the protective box body 1 during measurement, and the measurement can be completed without disassembling the base 4.

[0064] Meanwhile, the base 4 is detachable. If the foundation is slightly uneven, the installation angle can be adjusted by removing the base 4 or replacing it with a base 4 of suitable thickness to ensure that the protective box body 1 is in a horizontal state. This avoids the box cover 2 not sealing properly or the automatic locking mechanism 5 being subjected to uneven force due to the foundation tilt. If the base 4 is damaged due to bumps or wear on the construction site, there is no need to replace the entire protective box device. Only the old base 4 needs to be removed and replaced with a new one, reducing maintenance costs and replacement difficulty.

[0065] Optionally, by Figure 2 As shown in this embodiment, the inner wall of the inner ring 12 of the protective box is provided with an internal thread 121, and the outer wall of the base 4 is provided with an external thread 42. The base 4 is provided at the bottom end of the protective box body 1 by means of thread engagement. The outer wall of the base 4 is provided with an anti-slip groove 43. With the above solution, during installation, the worker aligns the base 4 with the bottom opening of the inner ring 12 of the protective box, so that the external thread 42 of the outer wall of the base 4 is aligned with the internal thread 121 of the inner wall of the inner ring 12 of the protective box. Then, by rotating the base 4, the rotational movement of the base 4 is converted into axial movement along the axis of the inner ring 12 of the protective box by utilizing the helical meshing relationship between the internal thread 121 and the external thread 42, so that the base 4 is gradually screwed into the bottom end of the protective box body 1.

[0066] As the threads continue to tighten, the connection between the base 4 and the inner ring 12 of the protective box gradually becomes tighter. The mating surfaces between the threads can form a certain sealing effect, reducing the entry of external dust and fine sand into the interior through the connection gap between the base 4 and the protective box body 1.

[0067] When it is necessary to disassemble the base 4 (such as to replace the base 4 or adjust the installation status), rotate the base 4 in the opposite direction. The helical structure of the internal thread 121 and the external thread 42 will once again convert the rotational motion into axial movement, so that the base 4 will gradually unscrew out of the inner ring 12 of the protective box along the axial direction, thus achieving convenient disassembly.

[0068] The anti-slip groove 43 increases the contact friction between the hand or tool (such as a wrench) and the base 4 by forming an uneven structure on the outside of the base 4, thus preventing slippage during the tightening process.

[0069] Components not described in detail in this article are existing technologies.

[0070] The working principle and usage process of this utility model: When using the foundation pit settlement point protection box device of this utility model, the protection box body 1 is buried in the foundation pit settlement observation point, and the measuring bolt is inserted into the interior of the protection box body 1 from the bottom end.

[0071] When it is necessary to protect the settlement point of the foundation pit, the staff rotates the cover 2 towards the protective box body 1, so that the cover 2 is gradually inserted into the receiving groove 13 between the inner ring 12 and the outer ring 11 of the protective box. During this process, the elastic reset component 7 undergoes elastic deformation to store elastic potential energy. The fixing block 51 on the cover 2 moves down synchronously with the cover 2. The end of the fixing block 51 contacts the locking block 54 at the top of the moving plate 53. Since the top surface of the locking block 54 is inclined, the fixing block 51 generates a lateral thrust on the inclined surface when it moves down, pushing the moving plate 53 to move away from the fixing block 51. At the same time, the moving plate 53 compresses the reset spring 56, so that the reset spring 56 stores elastic potential energy.

[0072] When the lid 2 is fully closed into the receiving groove 13, the slot 511 on the fixing block 51 corresponds exactly to the position of the locking block 54. At this time, the lateral pushing force of the fixing block 51 on the locking block 54 disappears, the return spring 56 releases elastic potential energy, and pushes the moving plate 53 to return to the position closer to the fixing block 51, so that the locking block 54 is accurately embedded in the slot 511 of the fixing block 51. The automatic locking mechanism 5 realizes the locking of the lid 2 and the protective box body 1. At the same time, the sealing element 3 in the receiving groove 13 is squeezed and deformed by the lid 2 and the groove wall of the receiving groove 13, tightly filling the gap between the two, playing a waterproof and dustproof sealing role, and preventing external impurities from entering the interior of the protective box body 1 and damaging the settling point measuring plug.

[0073] In daily use, the locked lid 2 and the seal 3 together protect the settlement point measuring plug from rainwater washing, dust accumulation and external impact, ensuring that the measurement accuracy of the settlement point is not affected by the external environment.

[0074] When it is necessary to measure the settlement point of the foundation pit, the staff pulls the force rod 57 away from the fixed block 51, so that the moving plate 53 moves. The moving plate 53 compresses the reset spring 56, which drives the locking block 54 to disengage from the slot 511. The locking state of the automatic locking mechanism 5 is released. At this time, the elastic reset component 7 (torsion spring) releases elastic potential energy and generates an upward pushing force on the cover 2, so that the cover 2 automatically rotates upward around the rotation connection point with the protective box body 1, thereby popping open the cover 2 and exposing the settlement point measuring plug inside the protective box, so that the staff can use the measuring ruler to connect the measuring plug to collect settlement data.

[0075] After the measurement is completed, the staff rotates the cover 2 towards the receiving groove 13 again, repeating the locking process to put the device back into the protection state, ready for the next measurement.

[0076] In another aspect of this utility model, a base support 4 (with a through hole 41 for the measuring plug to pass through) is installed at the bottom of the protective box body 1 by means of thread engagement. During installation, the through hole 41 can be used as a positioning reference to guide the measuring plug to pass smoothly through the base support 4, ensuring the coaxiality of the protective box body 1 and the measuring plug, avoiding the protective box body 1 from being installed off-center and obstructing the measuring plug, and ensuring that the subsequent measuring instruments can accurately connect to the measuring plug for data acquisition.

[0077] In addition, the presence of the through hole 41 allows the measuring plug and the base 4 to form a "through" fit. The base 4 provides stable support for the protective box body 1 without obstructing the measuring end of the measuring plug, ensuring that the instrument can directly contact the measuring plug through the inside of the protective box body 1 during measurement, and the measurement can be completed without disassembling the base 4.

[0078] Meanwhile, the base 4 is detachable. If the foundation is slightly uneven, the installation angle can be adjusted by removing the base 4 or replacing it with a base 4 of suitable thickness to ensure that the protective box body 1 is in a horizontal state. This avoids the box cover 2 not sealing properly or the automatic locking mechanism 5 being subjected to uneven force due to the foundation tilt. If the base 4 is damaged due to bumps or wear on the construction site, there is no need to replace the entire protective box device. Only the old base 4 needs to be removed and replaced with a new one, reducing maintenance costs and replacement difficulty.

[0079] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective box device for foundation pit settlement points in construction engineering surveying, comprising a protective box body (1) and a box cover (2) rotatably connected to the protective box body (1), characterized in that, It also includes a seal (3), an automatic locking mechanism (5), and a spring-loaded reset component (7); The protective box body (1) includes an outer protective box ring (11) and an inner protective box ring (12) that are fixed together. There is a receiving groove (13) between the top of the inner protective box ring (12) and the top of the outer protective box ring (11) for accommodating the box cover (2). The sealing member (3) is disposed in the receiving groove (13). The automatic locking mechanism (5) is located between the outer ring (11) of the protective box and the box cover (2). It includes a fixing block (51) fixed to the box cover (2), a movable plate (53) movably connected to the outer ring (11) of the protective box, and a return spring (56) for moving the movable plate (53) toward the fixing block (51). The end of the fixing block (51) is provided with a slot (511) for the movable plate (53) to be inserted. The top of the movable plate (53) is fixed with a locking block (54) that cooperates with the fixing block (51), and the top surface of the locking block (54) is an inclined surface. The elastic reset member (7) is located between the box cover (2) and the outer ring (11) of the protective box, and is used to automatically pop open the box cover (2) after the automatic locking mechanism (5) is released.

2. The foundation pit settlement point protection box device according to claim 1, characterized in that: The automatic locking mechanism (5) also includes a mounting box (52) and a guide rod (55); The mounting box (52) is fixed to the top of the outer wall of the outer ring (11) of the protective box, and the movable plate (53) is partially embedded in the mounting box (52); The guide rod (55) is fixed inside the mounting box (52) and passes through the moving plate (53). The reset spring (56) is sleeved on the guide rod (55) and is located between the inner wall of the mounting box (52) and the moving plate (53).

3. The foundation pit settlement point protection box device according to claim 2, characterized in that: A force-applying rod (57) is fixed to the outer wall of the movable plate (53).

4. The foundation pit settlement point protection box device for construction engineering surveying according to claim 2, characterized in that: A sealing plate (58) is fixed to the outer wall of the movable plate (53), and the bottom surface of the sealing plate (58) is attached to the top surface of the mounting box (52).

5. The foundation pit settlement point protection box device according to claim 1, characterized in that: The automatic locking mechanism (5) is symmetrically distributed in two sets.

6. The foundation pit settlement point protection box device according to claim 1, characterized in that: It also includes the mounting shaft (6); A connecting block (21) is fixed on the cover (2), and an installation groove (111) is provided at the top of the outer ring (11) of the protective box. The connecting block (21) is rotatably installed in the installation groove (111) by means of the installation shaft (6). The elastic reset component (7) is a torsion spring. The elastic reset component (7) is sleeved on the mounting shaft (6), and one end of the elastic reset component (7) is connected to the connecting block (21), and the other end is connected to the outer ring (11) of the protective box.

7. A foundation pit settlement point protection box device for construction engineering surveying according to claim 6, characterized in that: An arc-shaped protective plate (211) is fixed to the outer wall of the connecting block (21).

8. The foundation pit settlement point protection box device according to claim 1, characterized in that: The sealing element (3) includes a rubber sealing ring (31) and a rubber protrusion ring (32) fixed to the top of the inner side of the rubber sealing ring (31).

9. A foundation pit settlement point protection box device for construction engineering surveying according to claim 1, characterized in that: It also includes the base (4); The base (4) is detachably installed at the bottom of the protective box body (1), and a through hole (41) for the measuring bolt to pass through is provided on the base (4).

10. A foundation pit settlement point protection box device for construction engineering surveying according to claim 9, characterized in that: The inner wall of the inner ring (12) of the protective box is provided with an internal thread (121), and the outer wall of the base (4) is provided with an external thread (42). The base (4) is provided at the bottom of the protective box body (1) by means of thread engagement; the outer wall of the base (4) is provided with an anti-slip groove (43).

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