Device for applying steel support prestress to deep foundation pit for rail transit

Abstract

The utility model discloses a deep foundation pit steel support prestress applying device for rail transit, and particularly relates to the technical field of foundation pit supporting, the deep foundation pit steel support prestress applying device comprises two supporting plates used for supporting a deep foundation pit, fixing frames are installed on the sides, close to each other, of the two supporting plates, and a supporting assembly used for enhancing supporting strength is arranged between the two fixing frames; an adjusting assembly capable of being driven in multiple modes is arranged outside the supporting assembly. The adjusting assembly comprises a box body. The electromagnetic ring is powered on and connected with the fixing shaft, the micro motor can drive the connecting plate to drive the driving gear on the fixing shaft to rotate, the driving gear drives the supporting assembly on the threaded rod through the meshed driven gear, and when the electromagnetic ring is powered off and is separated from the fixing shaft, the supporting assembly is driven to rotate. The knob can be operated to drive the driving gear on the fixed shaft to rotate, so that the combination of an electric operation mode and a manual operation mode can be realized, and the practicability of the device and the operation convenience of workers are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to a steel support prestressing device for a deep foundation pit used in rail transportation. Background Art

[0002] In urban rail transit projects, when the foundation pit construction depth exceeds 5 meters, it is usually called deep foundation pit construction. Deep foundation pit construction can not only provide an ideal working platform for urban rail transit projects, but also create a more stable foundation for the project by excavating and replacing weak foundations. Deep foundation pit support is a support, reinforcement and protection measure for the side walls of the foundation pit and the surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. It is often necessary to set anchor rods on the support piles, and internal supports are also required to ensure that the support piles effectively support the slope of the foundation pit.

[0003] As shown in the application document of the prior art publication number CN216865176U, it includes a guard plate, and there are two groups of guard plates. The inner sides of the two groups of guard plates are fixedly installed with a protrusion, and a groove is opened in the middle of the protrusion. A limit block is placed on the top of the groove. A sleeve rod is fixedly installed on the inner side of the limit block. A screw hole is opened in the middle of the sleeve rod. The sleeve rod is screwed with a screw through the screw hole, and the threads of the two groups of screws are opened in opposite directions. This technical solution sets a limit block and a spring. Whenever a falling object impacts the sleeve rod and the screw lateral support mechanism, the lateral support mechanism can be prevented from hard collision with the falling object through the movable setting of the lateral mechanism and the buffering effect of the spring, thereby reducing the probability of deformation. At the same time, the limit block can be driven to move back to its position by the tension of the spring to prevent subsequent falling objects from damaging the support mechanism. The automatic return ensures the impact protection effect.

[0004] However, in the above technical solution, when adjusting the extension length of the sleeve rod, the staff needs to repeatedly rotate the screw rod, which is inefficient and cumbersome to operate, thereby increasing the work intensity of the staff and thus affecting the adjustment efficiency of the staff. Utility Model Content

[0005] To this end, an embodiment of the utility model provides a device for applying prestressed steel support in a deep foundation pit for rail transit, so as to solve the problem in the prior art that the operation is inefficient and complicated due to the need to repeatedly rotate the screw.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides the following technical solutions: a device for applying prestress to steel supports in a deep foundation pit for rail transit, comprising two support plates for supporting the deep foundation pit, a fixing frame is installed on each side of the two support plates close to each other, and a support assembly for enhancing the support strength is provided between the two fixing frames;

[0007] The support assembly is provided with an adjustment assembly that can be driven in multiple ways on the outside;

[0008] The adjustment assembly includes a box body, a fixed shaft with one end movably connected by a bearing is arranged inside the box body, a connecting plate is arranged at the other end of the fixed shaft, and an electromagnetic ring sleeved on the outside of the fixed shaft is installed on the side of the connecting plate close to the fixed shaft;

[0009] A micro motor is installed on one side of the box body corresponding to the connecting plate, the output shaft of the micro motor passes through the box body and is fixed to the connecting plate, and a knob is provided on the side of the box body away from the micro motor, the knob passes through the box body and is fixed to the fixed shaft;

[0010] The fixed shaft is sleeved with a driving gear on the outside, a threaded rod is provided on the top of the driving gear, and a driven gear meshing with the driving gear is sleeved on the outside of the threaded rod.

[0011] Furthermore, the support assembly includes two hollow tubes, which are fixedly connected to both sides of the top of the box body, and movable seats are provided inside the two hollow tubes. The two movable seats are respectively sleeved on the outside of both ends of the threaded rod, and the inner wall of the movable seat is threadedly connected to the outside of the threaded rod. The movable seat extends to one side of the support plate away from one end of the hollow tube. The movable seat is limited by the hollow tube so that the threaded rod can drive the movable seat to move inward or outward, so that various adjustments can be made according to the width of the deep foundation pit, thereby improving the practicality of the utility model.

[0012] Furthermore, the cross-section of the movable seat and the cross-section of the hollow tube are both set to be rectangular, and the outside of the movable seat is in contact with the inner wall of the hollow tube. By setting the cross-section of the movable seat and the cross-section of the hollow tube to be rectangular, the hollow tube can limit the movable seat, so that the movable seat can move laterally, ensuring the stability of the movable seat during movement and avoiding deviation.

[0013] Furthermore, a fixing seat is installed inside the ends of the two hollow tubes that are close to each other. The fixing seat is sleeved on the outside of the threaded rod. The inner wall of the fixing seat is movably connected to the outside of the threaded rod through a bearing. Through the movable connection between the fixing seat and the threaded rod, the fixing seat can support and fix the threaded rod to ensure the stability of the threaded rod during operation.

[0014] Furthermore, a controller for adjusting the micro motor and the electromagnetic ring is installed on the front side of the box. Through the setting of the controller, it is convenient for the staff to operate the controller to adjust the electromagnetic ring and the micro motor, thereby improving the convenience of the staff in operating the utility model.

[0015] Furthermore, a buffer plate is provided on the top of the box body, and telescopic rods connected to the top of the hollow tube are installed at the bottom of both ends of the buffer plate. A spring is provided on the outer sleeve of the top end of the telescopic rod. Through the telescopic rod and the spring, the buffer plate can buffer the impact when it receives an impact, thereby avoiding damage to the supporting assembly and the adjusting assembly caused by excessive impact.

[0016] Furthermore, the threads at both ends of the threaded rod have opposite directions, and the threads at both ends of the threaded rod are symmetrically distributed about the central axis of the threaded rod. By setting the threads at both ends of the threaded rod to have opposite directions, the threaded rod can drive the two movable seats to move inward or outward at the same time, so that the staff can operate the movement of the two movable seats in one step, thereby improving the convenience of the staff during operation.

[0017] Furthermore, a handle is installed on the top of the box body, and through the connection between the handle and the box body, it is convenient for a worker to operate the handle to hold the box body.

[0018] The utility model embodiment has the following advantages:

[0019] By energizing the electromagnetic ring and connecting it to the fixed shaft, the micro motor can drive the connecting plate to drive the driving gear on the fixed shaft to rotate, and the driving gear then drives the supporting assembly on the threaded rod with the help of the meshing driven gear. When the electromagnetic ring is powered off and separated from the fixed shaft, the knob can be operated to drive the driving gear on the fixed shaft to rotate. This can realize the combination of electric and manual operation modes, thereby improving the practicality of the utility model and the convenience of operation for staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2This is the front view of the hollow tube of the utility model;

[0024] Figure 3 It is a cross-sectional view of the hollow tube of the utility model;

[0025] Figure 4 For the utility model Figure 3 Enlarged view of part A;

[0026] Figure 5 It is a side view of the support plate of the utility model.

[0027] In the figure: 1. support plate; 2. fixed frame; 3. box body; 4. fixed shaft; 5. connecting plate; 6. electromagnetic ring; 7. micro motor; 8. knob; 9. driving gear; 10. threaded rod; 11. driven gear; 12. hollow tube; 13. movable seat; 14. controller; 15. buffer plate; 16. telescopic rod; 17. spring; 18. fixed seat; 19. handle. DETAILED DESCRIPTION

[0028] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Refer to the instruction manual Figure 1-5 The utility model provides a steel support prestressing device for deep foundation pits for rail transit, comprising two support plates 1 for deep foundation pit support, a fixing frame 2 is installed on the adjacent sides of the two support plates 1, and a support assembly for enhancing the support strength is provided between the two fixing frames 2;

[0030] like Figure 1-3As shown, the support assembly includes two hollow tubes 12, and the two hollow tubes 12 are fixedly connected to the two sides of the top of the box body 3 respectively. A movable seat 13 is provided inside the two hollow tubes 12, and the two movable seats 13 are respectively sleeved on the outside of the two ends of the threaded rod 10, and the inner wall of the movable seat 13 is threadedly connected to the outside of the threaded rod 10. The movable seat 13 extends to one side of the support plate 1 away from the end of the hollow tube 12. The movable seat 13 is limited by the hollow tube 12, so that the threaded rod 10 can drive the movable seat 13 to move inward or outward, so that various adjustments can be made according to the width of the deep foundation pit, thereby improving the practicality of the utility model. The cross-section of the movable seat 13 and the cross-section of the hollow tube 12 are both set to be rectangular, and the outside of the movable seat 13 contacts the inner wall of the hollow tube 12. By setting the cross-section of the movable seat 13 and the cross-section of the hollow tube 12 to be rectangular, the hollow tube 12 can limit the movable seat 13, so that the movable seat 13 can move laterally, ensuring the stability of the movable seat 13 during movement and avoiding deviation.

[0031] like Figure 4 As shown, a fixing seat 18 is installed inside the adjacent ends of the two hollow tubes 12. The fixing seat 18 is sleeved on the outside of the threaded rod 10. The inner wall of the fixing seat 18 is movably connected to the outside of the threaded rod 10 through a bearing. Through the movably connected between the fixing seat 18 and the threaded rod 10, the fixing seat 18 can support and fix the threaded rod 10 to ensure the stability of the threaded rod 10 during operation.

[0032] In order to improve the convenience of operating the support assembly, an adjustment assembly that can be driven in multiple ways is provided on the outside of the support assembly;

[0033] like Figure 3 and 4 As shown, the adjustment component includes a box body 3, a fixed shaft 4 with one end movably connected by a bearing is provided inside the box body 3, a connecting plate 5 is provided at the other end of the fixed shaft 4, and an electromagnetic ring 6 sleeved on the outside of the fixed shaft 4 is installed on the side of the connecting plate 5 close to the fixed shaft 4; a micro motor 7 is installed on the side of the box body 3 corresponding to the connecting plate 5, the output shaft of the micro motor 7 passes through the box body 3 and is fixed to the connecting plate 5, and a knob 8 is provided on the side of the box body 3 away from the micro motor 7, and the knob 8 passes through the box body 3 and is fixed to the fixed shaft 4; a driving gear 9 is sleeved on the outside of the fixed shaft 4, a threaded rod 10 is provided on the top of the driving gear 9, and a driven gear 11 meshing with the driving gear 9 is sleeved on the outside of the threaded rod 10.

[0034] like Figure 1 As shown, a controller 14 for adjusting the micro motor 7 and the electromagnetic ring 6 is installed on the front side of the box body 3. Through the setting of the controller 14, it is convenient for the staff to operate the controller 14 to adjust the electromagnetic ring 6 and the micro motor 7, thereby improving the convenience of the staff in operating the utility model.

[0035] like Figure 1 and 2 As shown, a buffer plate 15 is provided on the top of the box body 3, and telescopic rods 16 connected to the top of the hollow tube 12 are installed at the bottom of both ends of the buffer plate 15. A spring 17 is sleeved on the top of the telescopic rod 16. Through the telescopic rod 16 and the spring 17, the buffer plate 15 can buffer and unload the impact when it receives an impact, so as to avoid damage to the support component and the adjustment component caused by excessive impact.

[0036] like Figure 3 As shown, the threads at both ends of the threaded rod 10 have opposite directions, and the threads at both ends of the threaded rod 10 are symmetrically distributed about the central axis of the threaded rod 10. By setting the threads at both ends of the threaded rod 10 to have opposite directions, the threaded rod 10 can drive the two movable seats 13 to move inward or outward at the same time, so that the staff can operate the movement of the two movable seats 13 in one step, thereby improving the convenience of the staff during operation.

[0037] like Figure 1 and 2 As shown, a handle 19 is installed on the top of the box body 3. Through the connection between the handle 19 and the box body 3, it is convenient for the staff to operate the handle 19 to hold the box body 3.

[0038] First, the staff operates the controller 14 to energize the electromagnetic ring 6, so that the electromagnetic ring 6 is connected to the fixed shaft 4, thereby the micro motor 7 drives the connecting plate 5 to drive the driving gear 9 on the fixed shaft 4 to rotate, and the driving gear 9 then drives the threaded rod 10 to rotate with the help of the meshing driven gear 11, and the threaded rod 10 then drives the two movable seats 13 limited by the hollow tube 12 to move outward to the inside of the fixed frame 2, thereby enhancing the supporting strength of the support plate 1 to the deep foundation pit;

[0039] When the overall power of the device is too low, the electromagnetic ring 6 is powered off and the fixed shaft 4 is disconnected from the micro motor 7, so that the staff can operate the knob 8 to drive the active gear 9 on the fixed shaft 4 to rotate, and the active gear 9 then drives the threaded rod 10 to rotate with the help of the meshing driven gear 11, so that manual operation can be achieved. The combination of electric and manual operation can improve the practicality of the utility model and the convenience of operation for the staff.

[0040] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A steel support prestressing device for deep foundation pits for rail transit, comprising two support plates (1) for supporting deep foundation pits, characterized in that: A fixing frame (2) is installed on each of the two support plates (1) on the side close to each other, and a supporting component for enhancing the supporting strength is provided between the two fixing frames (2); The support assembly is provided with an adjustment assembly that can be driven in multiple ways on the outside; The adjustment assembly comprises a box (3), a fixed shaft (4) having one end movably connected via a bearing is provided inside the box (3), a connecting plate (5) is provided at the other end of the fixed shaft (4), and an electromagnetic ring (6) sleeved on the outside of the fixed shaft (4) is installed on a side of the connecting plate (5) close to the fixed shaft (4); A micro motor (7) is installed on one side of the box (3) corresponding to the connecting plate (5); an output shaft of the micro motor (7) passes through the box (3) and is fixed to the connecting plate (5); a knob (8) is provided on the side of the box (3) away from the micro motor (7); the knob (8) passes through the box (3) and is fixed to the fixed shaft (4); The fixed shaft (4) is sleeved with a driving gear (9) on the outside, a threaded rod (10) is provided at the top of the driving gear (9), and a driven gear (11) meshing with the driving gear (9) is sleeved with the outside of the threaded rod (10).

2. The device for applying prestressed steel support to a deep foundation pit for rail transit according to claim 1, characterized in that: The support assembly comprises two hollow tubes (12), the two hollow tubes (12) are respectively fixedly connected to the two sides of the top of the box body (3), and the two hollow tubes (12) are provided with movable seats (13) inside. The two movable seats (13) are respectively sleeved on the outside of the two ends of the threaded rod (10), and the inner wall of the movable seat (13) is threadedly connected to the outside of the threaded rod (10), and the movable seat (13) extends from one end of the hollow tube (12) to one side of the support plate (1).

3. The device for applying prestressed steel support to a deep foundation pit for rail transit according to claim 2, characterized in that: The cross-sections of the movable seat (13) and the hollow tube (12) are both set to be rectangular, and the outside of the movable seat (13) is in contact with the inner wall of the hollow tube (12).

4. The device for applying prestressed steel support to a deep foundation pit for rail transit according to claim 1, characterized in that: A controller (14) for regulating the micro motor (7) and the electromagnetic ring (6) is installed on the front side of the box (3).

5. The device for applying prestressed steel support to a deep foundation pit for rail transit according to claim 2, characterized in that: A buffer plate (15) is provided on the top of the box body (3), and telescopic rods (16) connected to the top of the hollow tube (12) are installed at the bottom of both ends of the buffer plate (15), and a spring (17) is sleeved on the top of the telescopic rod (16).

6. The device for applying prestressed steel support to a deep foundation pit for rail transit according to claim 1, characterized in that: The threads at both ends of the threaded rod (10) have opposite thread directions, and the threads at both ends of the threaded rod (10) are symmetrically distributed about the central axis of the threaded rod (10).

7. The device for applying prestressed steel support to a deep foundation pit for rail transit according to claim 2, characterized in that: A fixing seat (18) is installed inside the adjacent ends of the two hollow tubes (12), and the fixing seat (18) is sleeved on the outside of the threaded rod (10). The inner wall of the fixing seat (18) is movably connected to the outside of the threaded rod (10) through a bearing.

8. The device for applying prestressed steel support to a deep foundation pit for rail transit according to claim 1, characterized in that: A handle (19) is installed on the top of the box body (3).

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