Limiting device
By designing the limiting device in the lifting transformation of a simple-supported bridge, the structure of the fixed components and guide components is used to solve the problem of jack overturn caused by longitudinal horizontal force, the limitation of longitudinal displacement and the guarantee of jack stability is achieved, and the Construction safety.
Patent Information
- Application Number
- CN202421061513.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2024-12-31
- Estimated Expiration
- Not applicable · inactive patent
Smart Images
Figure CN222275293U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of jacking and reconstruction of simply supported bridges, in particular to a limiting device. Background Art
[0002] During the jacking reconstruction of a simply supported bridge, the longitudinal slope changes before and after the jacking, which will cause a longitudinal horizontal force component to be generated during the jacking process. The greater the change in the longitudinal slope, the greater the longitudinal horizontal force component generated. The jacking jack is placed directly on the support system and does not have the ability to resist horizontal slippage and overturning. If the longitudinal horizontal force component is not restricted, the jack will overturn due to the large horizontal thrust, causing a safety accident. Therefore, during the jacking process, it is necessary to limit the longitudinal horizontal force component, strictly control the longitudinal displacement of the beam body, and ensure the stability of the jack, which becomes the key to the jacking reconstruction construction. For this reason, we propose a limit device. Utility Model Content
[0003] The purpose of the utility model is to provide a limiting device to solve the problems raised in the above background technology.
[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0005] A limiting device includes a fixed beam fixed on a bridge pier, and a lifting beam arranged at one end of the fixed beam, a jack is arranged at the bottom of the lifting beam, the output end of the jack is fixed to the lifting beam, and a limiting structure is assembled between the lifting beam and the fixed beam, and the limiting structure is used to limit the longitudinal horizontal component force generated during the lifting process of the lifting beam.
[0006] Preferably, the limiting structure includes a fixing assembly and a guiding assembly, the tops of the lifting beam and the fixed beam are both equipped with fixing assemblies, and a guiding assembly is installed between the fixing assembly and the lifting beam.
[0007] Preferably, the fixing assembly includes M22 anchor bolts, anchoring steel plates, limiting columns and limiting beams. The tops of the lifting beam and the fixed beam are each equipped with two limiting columns. The bottoms of the limiting columns are each fixed with anchoring steel plates. The anchoring steel plates are fixed to the lifting beam and the fixed beam through M22 anchor bolts. The tops of the lifting beam and the fixed beam are each equipped with limiting beams, and the limiting beams are each tightly fitted with the limiting columns.
[0008] Preferably, the guide assembly includes a limiting longitudinal beam and a steel wedge, a limiting longitudinal beam is fixed to the bottom of the two limiting cross beams, a gap is provided between the two limiting columns located at the same end, the limiting longitudinal beam is in the gap and fits tightly against the limiting column.
[0009] Preferably, a first adjustment gap exists between the two limit columns located at the same end and one of the limit beams, and a second adjustment gap exists between the lifting beam body and the fixed beam body.
[0010] Preferably, the first adjustment gap is gap B when the steel wedge is not acted upon by external force, and the first adjustment gap is gap D when the steel wedge is acted upon by external force, and the gap B is smaller than the gap D.
[0011] Preferably, the second adjustment gap is a beam gap A when the lifting beam body is not subjected to external force, and the second adjustment gap is a beam gap C when the lifting beam body is subjected to external force, and the beam gap A is larger than the beam gap C.
[0012] It can be seen without a doubt that the above-mentioned technical solution of the present application can definitely solve the technical problem to be solved by the present application.
[0013] At the same time, through the above technical solutions, the utility model has at least the following beneficial effects:
[0014] The utility model adopts the structural design of the limiting structure to make the device convenient for limiting the longitudinal displacement of the jacking beam body, reduce the longitudinal horizontal thrust borne by the jack, ensure the stability of the jack, and improve the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 It is a schematic diagram of the structure of the utility model;
[0017] Figure 2 It is a schematic diagram of the state of the jacking beam body of the utility model before jacking;
[0018] Figure 3 It is a schematic diagram of the state of the jacking beam body of the utility model after jacking.
[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0020] In the figure: 1. M22 anchor bolt; 2. Anchor steel plate; 3. Limit column; 4. Limit cross beam; 5. Limit longitudinal beam; 6. Steel wedge; 7. Lifting beam; 8. Fixed beam; 9. Beam joint A; 10. Beam joint C; 11. Gap B; 12. Gap D. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0022] Example
[0023] Reference Figure 1-3 A limiting device includes a fixed beam 8 fixed on a bridge pier, and a lifting beam 7 arranged at one end of the fixed beam 8, a jack is arranged at the bottom of the lifting beam 7, the output end of the jack is fixed to the lifting beam 7, and a limiting structure is assembled between the lifting beam 7 and the fixed beam 8. The limiting structure is used to limit the longitudinal horizontal component force generated during the lifting process of the lifting beam 7. It can be understood that the jack is fixed on the ground, bridge piers or other supporting surfaces to provide power for the lifting of the lifting beam 7.
[0024] The limiting structure includes a fixing assembly and a guiding assembly. The tops of the lifting beam body 7 and the fixed beam body 8 are both equipped with fixing assemblies, and a guiding assembly is installed between the fixing assembly and the lifting beam body 7.
[0025] The fixing components include M22 anchor bolts 1, anchoring steel plates 2, limiting columns 3 and limiting cross beams 4. The tops of the jacking beam 7 and the fixed beam 8 are each equipped with two limiting columns 3. The bottoms of the limiting columns 3 are each fixed with anchoring steel plates 2. The anchoring steel plates 2 are fixed to the jacking beam 7 and the fixed beam 8 through the M22 anchor bolts 1. The tops of the jacking beam 7 and the fixed beam 8 are each equipped with limiting cross beams 4. The limiting cross beams 4 are each tightly fitted to the limiting columns 3. Through the setting of the limiting cross beams 4, the longitudinal horizontal component force occurring during the jacking process can always exist on the limiting longitudinal beams 5.
[0026] The guide assembly includes a limiting longitudinal beam 5 and a steel wedge 6. A limiting longitudinal beam 5 is fixed at the bottom of the two limiting cross beams 4. A gap is set between the two limiting columns 3 located at the same end. The limiting longitudinal beam 5 is in the gap and fits tightly against the limiting column 3. The setting of the steel wedge 6 facilitates increasing the connection firmness between the limiting column 3 and the limiting cross beam 4.
[0027] There is a first adjustment gap between the two limit columns 3 located at the same end and one of the limit beams 4, and a second adjustment gap between the lifting beam body 7 and the fixed beam body 8. The first adjustment gap is gap B11 when the steel wedge 6 is not acted upon by external force, and the first adjustment gap is gap D12 when the steel wedge 6 is acted upon by external force, and the gap B11 is smaller than the gap D12. When the lifting beam body 7 is lifted by the jack, the first adjustment gap will gradually increase from gap B11 to gap D12, so as to facilitate the steel wedge 6 to fall when it is subjected to force.
[0028] The second adjustment gap is beam gap A9 when the jacking beam 7 is not acted upon by external force, and is beam gap C10 when the jacking beam 7 is acted upon by external force, and beam gap A9 is larger than beam gap C10. In the process of the jacking beam 7 being lifted by the jack, the second adjustment gap will gradually decrease from beam gap A9 to beam gap C10, and the steel wedge 6 will be manually hammered to keep the limiting cross beam 4 and the limiting column 3 in a tight fit, ensuring that the longitudinal horizontal force component appearing in the jacking process always exists on the limiting longitudinal beam 5, thereby reducing the longitudinal horizontal thrust borne by the jack and ensuring the stability of the jack.
[0029] Before construction, drill holes at designated positions on the ends of the lifting beam 7 and the fixed beam 8, with a hole diameter of 26 mm and a drilling depth of 20 cm. Then use a high-pressure air gun to blow the hole wall clean. After the drilling powder is blown clean, inject Class A rebar embedding glue, and then vertically insert the M22 anchor bolt 1 into the Class A rebar embedding glue.
[0030] The anchoring steel plate 2 is made of Q235 steel with a size of 728x375mm. It is cut and formed in the factory and punched at a predetermined position with a hole diameter of 24mm. After the semi-finished product is transported to the site, the holes of the anchoring steel plate 2 are manually fixed with the M22 anchor bolts 1, and the anchoring steel plate 2 is fixed to the lifting beam 7 and the fixed beam 8 as a whole.
[0031] Welded limit column 3: The limit column 3 is made of double-jointed 28 channel steel, with a height of 446mm, and the bottom is welded and fixed to the anchor steel plate 2.
[0032] Processing and manufacturing of the limit beam 4: The limit beam 4 is welded by double-piece 28 channel steel and has a length of 1.2m.
[0033] Processing and manufacturing of the limiting longitudinal beam 5: The limiting longitudinal beam 5 is welded by double-jointed 28 channel steels and has a length of 3.28m.
[0034] Welding the limiting cross beam 4 and the limiting longitudinal beam 5: Weld the processed and formed limiting cross beam 4 to the two ends of the limiting longitudinal beam 5 to complete the connection between the limiting cross beam 4 and the limiting longitudinal beam 5.
[0035] Install the limiting longitudinal and transverse beams: insert the limiting transverse beam 4 and limiting longitudinal beam 5 welded into a whole into the limiting column 3, and make the limiting transverse beam 4 at the end of the lifting beam fit closely with the limiting column 3.
[0036] Install the steel wedge 6: The steel wedge 6 is made of Q235 steel plate, one side is a vertical surface, and the other side is an inclined surface. Wedge the steel wedge 6 into the first adjustment gap and use a small hammer to knock the steel wedge 6.
[0037] Repeat the above steps to complete the installation of all longitudinal limiters at the beam ends. The number of longitudinal limit devices is determined by the maximum longitudinal horizontal component force calculated based on the change in jacking slope.
[0038] From the above, we can know that:
[0039] The implementation process of the technical solution of the utility model is:
[0040] When performing the jacking operation, the jack is started, and the output end of the jack pushes the jacking beam 7 to jack up. As the second adjustment gap becomes smaller, the steel wedge 6 will gradually become loose, and a small hammer is used to continuously knock the steel wedge 6 to tighten it, ensuring the tightness of the limit beam 4 and the limit column 3, making the structure formed by the limit column 3 and the limit longitudinal beam 5 more stable.
[0041] After the jacking transformation is completed, knock off the steel wedge 6, then remove the limiting cross beam 4 and the limiting longitudinal beam 5, then remove the limiting column 3, then remove the anchor steel plate 2, and finally cut off the M22 anchor bolt 1 to complete the removal of the limiting device.
[0042] During the lifting process of the lifting beam 7, the longitudinal horizontal force component of the beam is transmitted to the fixed beam 8 by the limiting cross beam 4 and the limiting longitudinal beam 5. The reaction force provided by the fixed beam 8 offsets the longitudinal horizontal force component of the limiting cross beam 4 and the limiting longitudinal beam 5, thereby limiting the longitudinal displacement of the lifting beam 7, reducing the longitudinal horizontal force component borne by the lifting devices such as the jack, ensuring the stability of the lifting devices such as the jack, and ensuring safe construction.
[0043] Through the above settings, this application can certainly achieve the following technical effects:
[0044] The utility model uses the structural design of the limiting structure to facilitate the device to limit the longitudinal displacement of the lifting beam 7, reduce the longitudinal horizontal thrust borne by the jack, ensure the stability of the jack, and improve the safety of the device.
[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0046] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.
Claims
1. A limiting device, characterized in that: The invention comprises a fixed beam (8) fixed on a bridge pier, and a lifting beam (7) arranged at one end of the fixed beam (8), a jack being arranged at the bottom of the lifting beam (7), an output end of the jack being fixed to the lifting beam (7), a limiting structure being arranged between the lifting beam (7) and the fixed beam (8), and the limiting structure being used to limit the longitudinal horizontal component force generated during the lifting process of the lifting beam (7).
2. A limiting device according to claim 1, characterized in that: The limiting structure comprises a fixing component and a guiding component. The tops of the lifting beam (7) and the fixed beam (8) are both equipped with fixing components, and the guiding component is installed between the fixing component and the lifting beam (7).
3. A limiting device according to claim 2, characterized in that: The fixing assembly comprises an M22 anchor bolt (1), an anchoring steel plate (2), a limiting column (3) and a limiting cross beam (4); the tops of the lifting beam (7) and the fixed beam (8) are each equipped with two limiting columns (3); the bottoms of the limiting columns (3) are each fixed with an anchoring steel plate (2); the anchoring steel plate (2) is fixed to the lifting beam (7) and the fixed beam (8) through the M22 anchor bolt (1); the tops of the lifting beam (7) and the fixed beam (8) are each equipped with a limiting cross beam (4); and the limiting cross beam (4) is each tightly fitted with the limiting column (3).
4. A limiting device according to claim 3, characterized in that: The guide assembly comprises a limiting longitudinal beam (5) and a steel wedge (6). A limiting longitudinal beam (5) is fixed at the bottom of the two limiting cross beams (4). A gap is provided between the two limiting columns (3) at the same end. The limiting longitudinal beam (5) is located in the gap and fits tightly against the limiting columns (3).
5. A limiting device according to claim 3, characterized in that: A first adjustment gap exists between the two position-limiting upright posts (3) located at the same end and one of the position-limiting cross beams (4), and a second adjustment gap exists between the lifting beam body (7) and the fixed beam body (8).
6. A limiting device according to claim 5, characterized in that: The first adjustment gap is a gap B (11) when the steel wedge (6) is not subjected to external force, and the first adjustment gap is a gap D (12) when the steel wedge (6) is subjected to external force, and the gap B (11) is smaller than the gap D (12).
7. A limiting device according to claim 5, characterized in that: The second adjustment gap is a beam gap A (9) when the lifting beam body (7) is not acted upon by an external force, and the second adjustment gap is a beam gap C (10) when the lifting beam body (7) is acted upon by an external force, and the beam gap A (9) is larger than the beam gap C (10).