Large-scale weighing apparatus foundation pre-embedded bottom plate and large-scale weighing apparatus foundation

Abstract

The utility model discloses a large scale weighing apparatus foundation pre-embedded bottom plate and a large scale weighing apparatus foundation, and relates to the weighing apparatus equipment foundation technology field, the large scale weighing apparatus foundation pre-embedded bottom plate comprises a steel plate body, the thickness of the steel plate body is greater than or equal to 20mm, the steel plate body is provided with a plurality of pre-embedded bolt holes, a plurality of weighing sensor installing holes and a plurality of exhaust holes, the embedded bolt holes are formed in the circumferential direction of the steel plate body, the weighing sensor mounting holes are formed in one end of the steel plate body and form weighing sensor mounting positions, the diameter of the exhaust holes is 9-11 mm, the exhaust holes are located in an area with the center of the weighing sensor mounting positions as the circle center and the radius larger than or equal to 100 mm, the structure is simple, use is convenient, bubbles are effectively discharged, and the service life of the steel plate is prolonged. And the bonding strength of the embedded bottom plate and the civil engineering foundation after secondary grouting is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of weighing equipment foundation technology, and in particular to a pre-embedded base plate for a large weighing instrument foundation and a large weighing instrument foundation. Background Technology

[0002] With the rapid development of business and trade, the demand for fast handling of bulk goods and accurate one-time weighing of large-tonnage items is increasing. As a result, weighing instrument manufacturers have expanded the weighing range of large-scale weighing equipment, and correspondingly, the requirements for the quality of the foundation construction of these equipment have also risen.

[0003] As a crucial foundation component for installing large platform scales, buffer scales, rail scales, truck scales, and other similar equipment, the embedded base plate of a weighing instrument directly affects its stability, accuracy, sensitivity, consistent readings, and the lifespan of its components. However, existing technologies suffer from problems such as incomplete bonding after secondary grouting of the embedded base plate, leading to air bubbles that can easily damage the civil engineering foundation. With the increasing capacity of large weighing instruments, the risk of damage to the civil engineering foundation increases exacerbated. Utility Model Content

[0004] The purpose of this utility model is to provide a pre-embedded base plate for a large weighing instrument foundation and a large weighing instrument foundation, so as to solve the problems existing in the prior art. It has a simple structure, is easy to use, effectively removes air bubbles, and effectively improves the bonding strength between the pre-embedded base plate and the civil engineering foundation after secondary grouting.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a pre-embedded base plate for a large weighing instrument foundation, comprising: a steel plate body with a thickness ≥20mm, the steel plate body having multiple pre-embedded bolt holes, multiple load cell mounting holes, and multiple vent holes, each of the pre-embedded bolt holes being arranged along the circumference of the steel plate body, each of the load cell mounting holes being located at one end of the steel plate body and forming a load cell mounting position, the diameter of the vent holes being 9-11mm, and each of the vent holes being located in an area with a radius ≥100mm centered on the center of the load cell mounting position.

[0007] Preferably, the pre-embedded bolt holes are evenly distributed along both sides of the steel plate body.

[0008] Preferably, the exhaust holes are distributed in a symmetrical matrix.

[0009] Preferably, the minimum distance between two adjacent exhaust holes is ≥150mm.

[0010] Preferably, the minimum edge distance between the vent hole and the pre-embedded bolt hole is ≥30mm.

[0011] This utility model provides a large-scale weighing instrument foundation, including:

[0012] As mentioned above, the foundation of a large weighing instrument is pre-embedded with a base plate;

[0013] The concrete body is formed by pouring concrete under the steel plate body;

[0014] A double-layer bidirectional steel mesh is embedded in the concrete body, and the mesh spacing is ≤150mm;

[0015] Multiple pre-embedded bolts, the bottom end of which is embedded in the concrete and the top end of which passes through the pre-embedded bolt hole, and the pre-embedded bolts are welded to the double-layer bidirectional steel mesh;

[0016] A locking nut, which is threadedly connected to the pre-embedded bolt and abuts against the bottom surface of the steel plate body to adjust and support the steel plate body;

[0017] A secondary grouting layer is formed by grouting between the concrete body and the steel plate body using grouting material;

[0018] The dual-channel exhaust path is formed by the gap between the pre-embedded bolt hole and the pre-embedded bolt and the exhaust hole during the grouting process of the secondary grouting layer.

[0019] Preferably, the thickness of the secondary grouting layer is 100±20mm.

[0020] The present invention achieves the following technical advantages over the prior art:

[0021] This utility model provides a pre-embedded base plate for a large weighing instrument foundation and the foundation itself. The steel plate body thickness is ≥20mm, ensuring sufficient strength and load-bearing capacity to withstand the weight of the large weighing equipment and various loads during use. Multiple pre-embedded bolt holes are arranged circumferentially along the steel plate body, facilitating a stable connection between the weighing equipment and the pre-embedded base plate. Load cell mounting holes are strategically located to ensure accurate and stable installation of the load cells. Vent holes are located in a specific area with a diameter of 9-11mm. Without affecting the strength of the pre-embedded base plate or causing deformation after drilling, these vent holes facilitate the removal of excess gas during secondary grouting, reducing air bubbles and honeycomb-like pitting, and improving the bonding quality between the pre-embedded base plate and the secondary grouting layer. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A top view of the pre-embedded base plate for the foundation of a large weighing instrument provided by this utility model;

[0024] Figure 2 A cross-sectional view of the large weighing instrument foundation provided by this utility model;

[0025] In the diagram: 1. Steel plate body; 2. Embedded bolt holes; 3. Load cell mounting holes; 4. Center of the load cell mounting position; 5. Vent hole; 6. Concrete body; 7. Embedded bolts; 8. Locking nuts; 9. Secondary grouting layer. Detailed Implementation

[0026] 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.

[0027] The purpose of this utility model is to provide a pre-embedded base plate for a large weighing instrument foundation and a large weighing instrument foundation, so as to solve the problems existing in the prior art. It has a simple structure, is easy to use, effectively removes air bubbles, and effectively improves the bonding strength between the pre-embedded base plate and the civil engineering foundation after secondary grouting.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] This embodiment provides a pre-embedded base plate for a large weighing instrument foundation, such as... Figure 1As shown, the system includes: a steel plate body 1 with a thickness ≥ 20 mm; multiple pre-embedded bolt holes 2, multiple load cell mounting holes 3, and multiple vent holes 5; each pre-embedded bolt hole 2 is arranged circumferentially along the steel plate body 1; each load cell mounting hole 3 is located at one end of the steel plate body 1, forming a load cell mounting position; the diameter of each vent hole 5 is 9–11 mm, and each vent hole 5 is located in an area with a radius ≥ 100 mm centered on the center 4 of the load cell mounting position. The thickness of the steel plate body 1 ≥ 20 mm ensures that the pre-embedded base plate has sufficient strength and load-bearing capacity to withstand the weight of the large weighing equipment and various loads during use. The multiple pre-embedded bolt holes 2 arranged circumferentially along the steel plate body 1 facilitate a stable connection between the weighing equipment and the pre-embedded base plate. The load cell mounting holes 3 form mounting positions at specific locations, ensuring the accuracy and stability of the load cell installation. Vent holes 5 are set in specific areas with a diameter of 9-11mm. Without affecting the strength of the embedded base plate or causing deformation after drilling, they are beneficial for venting excess gas during secondary grouting, reducing air bubbles and honeycomb surface defects, and improving the bonding quality between the embedded base plate and the secondary grouting layer 9.

[0031] In a preferred embodiment, each pre-embedded bolt hole 2 is evenly arranged along both sides of the steel plate body 1. The even arrangement of the pre-embedded bolt holes 2 along both sides of the steel plate body 1 makes the force more uniform when the weighing equipment is installed on the pre-embedded base plate, avoids the phenomenon of local stress concentration caused by uneven distribution of bolt holes, improves the stability and reliability of the connection, and thus improves the overall stability of the weighing equipment.

[0032] In a preferred embodiment, the vent holes 5 are distributed in a symmetrical matrix. This symmetrical matrix distribution allows gas to be discharged relatively evenly from all directions during the secondary grouting process, effectively preventing the formation of air bubbles or honeycomb-like pits in certain areas due to uneven venting. This further improves the tightness and integrity of the bond between the embedded base plate and the concrete, ensuring the quality of the weighing instrument foundation.

[0033] In a preferred embodiment, the minimum spacing between two adjacent vent holes 5 is ≥150mm. This ensures that the structural strength of the steel plate body 1 is not affected during the drilling process to form the vent holes 5, avoids local weakness of the steel plate due to the small spacing between the vent holes 5, and provides sufficient space for the smooth discharge of gas during secondary grouting, which helps to achieve a better venting effect.

[0034] In a preferred embodiment, the minimum edge distance between the vent hole 5 and the pre-embedded bolt hole 2 is ≥30mm. Maintaining a minimum edge distance of ≥30mm between the vent hole 5 and the pre-embedded bolt hole 2 prevents them from becoming too close, which could reduce the strength of the steel plate between them and affect the anchoring force of the pre-embedded bolt 7 and the connection stability of the weighing equipment. At the same time, a suitable distance also facilitates separate operation of both during construction, avoiding mutual interference.

[0035] Example 2

[0036] This embodiment provides a large-scale weighing instrument foundation, such as Figure 2 As shown, the structure includes: a large weighing instrument foundation with an embedded base plate, a concrete body 6, a double-layer bidirectional steel mesh, multiple embedded bolts 7, locking nuts 8, a secondary grouting layer 9, and a dual-channel venting path. The concrete body 6 is formed by pouring concrete below the steel plate body 1. The double-layer bidirectional steel mesh is embedded in the concrete body 6, with a mesh spacing of ≤150mm. The bottom end of the embedded bolt 7 is embedded in the concrete, and the top end passes through the embedded bolt hole 2. The embedded bolt 7 is welded to the double-layer bidirectional steel mesh. The locking nut 8 is threaded to the embedded bolt 7 and abuts against the bottom surface of the steel plate body 1 to adjust and support the steel plate body 1. The secondary grouting layer 9 is formed by grouting between the concrete body 6 and the steel plate body 1. The gap between the embedded bolt hole 2 and the embedded bolt 7 and the vent hole 5 form a dual-channel venting path during the grouting process of the secondary grouting layer 9. The overall structure of the large weighing instrument foundation, using the large weighing instrument foundation embedded base plate combined with the concrete body 6 and the double-layer bidirectional steel mesh, provides a stable and reliable load-bearing foundation. The concrete body 6 provides support for the entire foundation; the double-layer bidirectional steel mesh enhances the strength and integrity of the concrete, improving the foundation's resistance to deformation; the pre-embedded bolts 7 are welded to the double-layer bidirectional steel mesh, enabling better load transfer; the locking nuts 8 can adjust and support the steel plate body 1, ensuring its installation levelness and stability; the secondary grouting layer 9 fills the gap between the concrete body 6 and the steel plate body 1, making the bond between the two tighter. The dual-channel venting path can quickly and effectively expel gas during the secondary grouting process, greatly reducing residual air bubbles, achieving a tight bond between the pre-embedded base plate and the civil foundation without air bubbles, reducing the impact of the weighing equipment's loading and unloading process on the civil foundation, and extending the service life of the civil foundation and the weighing equipment.

[0037] In a preferred embodiment, the thickness of the secondary grouting layer 9 is 100±20mm. Controlling the thickness of the secondary grouting layer 9 to 100±20mm ensures sufficient gap between the filling concrete body 6 and the steel plate body 1, providing sufficient connection strength between the two. It also avoids problems such as increased weight, increased cost, and weak bonding caused by excessively thick grouting layers. Furthermore, it ensures the best grouting effect within the specified thickness range, which is beneficial for achieving a tight bond between the embedded base plate and the civil engineering foundation and the stability of overall performance.

[0038] Example 3

[0039] The construction process for this patent is as follows:

[0040] Construction preparation stage

[0041] Foundation investigation and subbase setting: Conduct a professional investigation of the foundation, and determine the graded sand and gravel or concrete subbase to be set at the bottom of the foundation based on the investigation results, to ensure that the compaction degree is ≥95% and meets the equipment load requirements.

[0042] Material selection for embedded base plate: Based on the equipment load, steel plates with a thickness of ≥20mm are selected as the material for the embedded base plate. Processing is performed to ensure that the surface flatness error of the embedded base plate is ≤2mm / m. 2 And ensure there are no welded parts.

[0043] Installation and positioning phase

[0044] Positioning operation: Use a level to carry out positioning work, and control the deviation between the center line of the base plate and the axis of the equipment within ≤3mm, while ensuring that the deviation between the two pre-embedded bolt holes and the equipment installation holes is ≤2mm.

[0045] Reinforcement binding and fixing: Bind a double-layer, two-way reinforcing mesh under the base slab, controlling the mesh spacing to ≤150mm. Weld the pre-embedded bolts 7 to the reinforcing bars for fixing, ensuring a verticality deviation of ≤1‰.

[0046] Formwork erection: Erect formwork with good airtightness to prevent grout leakage during concrete pouring.

[0047] Concrete pouring stage

[0048] Concrete should be poured in layers and vibrated to ensure compaction and prevent air bubbles and honeycomb-like pitting. A 100±20mm gap should be left for secondary pouring. After pouring, the position of embedded parts should be promptly corrected to prevent displacement.

[0049] Levelness adjustment and secondary grouting stage

[0050] Levelness retest and adjustment: Before installing the embedded base plate, retest its levelness. If the level error exceeds the specified value (>1mm / m), adjust it using shims or adjusting bolts.

[0051] Contact surface cleaning and secondary grouting: Clean the contact surface between the embedded base plate and the concrete, and then carry out secondary grouting to fill the gap between the two.

[0052] Modification and Implementation of Exhaust Hole 5

[0053] Modification of vent hole 5: According to the pre-planned plan, the embedded plate is reasonably divided, and a vent hole 5 with a diameter of 10mm is drilled in a position that does not affect the force on the weighing sensor.

[0054] Secondary grouting and effect: During the secondary grouting process, through stirring, vibration and other operations, air is discharged from the gap between the pre-embedded bolt 7 and the pre-embedded plate and the newly added vent hole 5, so as to achieve the effect of tight bonding between the pre-embedded base plate and the civil foundation without any residual air bubbles.

[0055] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pre-embedded base plate for a large weighing instrument foundation, characterized in that: include: The steel plate body has a thickness of ≥20mm. The steel plate body is provided with multiple pre-embedded bolt holes, multiple load cell mounting holes, and multiple vent holes. Each pre-embedded bolt hole is arranged along the circumference of the steel plate body. Each load cell mounting hole is located at one end of the steel plate body and forms a load cell mounting position. The diameter of each vent hole is 9-11mm, and each vent hole is located in an area with a radius of ≥100mm centered on the center of the load cell mounting position.

2. The embedded base plate for the foundation of a large weighing instrument according to claim 1, characterized in that: The pre-embedded bolt holes are evenly arranged along both sides of the steel plate body.

3. The embedded base plate for the foundation of a large weighing instrument according to claim 2, characterized in that: The exhaust ports are distributed in a symmetrical matrix.

4. The embedded base plate for the foundation of a large weighing instrument according to claim 3, characterized in that: The minimum distance between two adjacent exhaust holes is ≥150mm.

5. The embedded base plate for the foundation of a large weighing instrument according to claim 4, characterized in that: The minimum edge distance between the vent hole and the pre-embedded bolt hole is ≥30mm.

6. A foundation for a large weighing instrument, characterized in that: include: The large weighing instrument foundation embedded base plate as described in any one of claims 1 to 5; The concrete body is formed by pouring concrete under the steel plate body; A double-layer bidirectional steel mesh is embedded in the concrete body, and the mesh spacing is ≤150mm; Multiple pre-embedded bolts, the bottom end of which is embedded in the concrete and the top end of which passes through the pre-embedded bolt hole, and the pre-embedded bolts are welded to the double-layer bidirectional steel mesh; A locking nut, which is threadedly connected to the pre-embedded bolt and abuts against the bottom surface of the steel plate body to adjust and support the steel plate body; A secondary grouting layer is formed by grouting between the concrete body and the steel plate body using grouting material; The dual-channel exhaust path is formed by the gap between the pre-embedded bolt hole and the pre-embedded bolt and the exhaust hole during the grouting process of the secondary grouting layer.

7. The large weighing instrument foundation according to claim 6, characterized in that: The thickness of the secondary grouting layer is 100±20mm.

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