High-precision crown block rail mounting method for hydrometallurgy

Abstract

The invention provides a high-precision crown block rail mounting method for hydrometallurgy, which comprises the following steps: mounting a steel plate above a concrete crown block beam, sequentially mounting a base plate and a rail above the steel plate, symmetrically mounting rail pressing plates on two sides of the rail, symmetrically mounting adjusting nuts below the steel plate, and connecting the adjusting nuts with bolts in a threaded manner, the elevation and levelness of the steel plate are adjusted through the adjusting nuts, the side plate is installed along the edge of the concrete crown block beam, grouting materials are poured into the space defined by the concrete crown block beam, the steel plate and the side plate, and a leveling layer is formed. The steel plate elevation can be accurately adjusted according to the adjusting nuts, the track installation precision is improved, the track is installed above the steel plate, and due to the fact that the yield strength of the steel plate is higher than that of concrete, when the track is constantly impacted by loads in the traveling process of the crown block, the steel plate is additionally installed to avoid the concrete falling problem caused by the fact that stress is dynamic loads; the rail is in close contact with the steel plate, so that the purposes of improving rail mounting precision and enabling the crown block to run stably are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of track laying and relates to a method for installing a high-precision overhead crane track for hydrometallurgy. Background Art

[0002] Overhead cranes are usually used for material transportation in hydrometallurgical operations, and overhead crane tracks need to be laid at the operation site. The current overhead crane track laying process is as follows: after the concrete overhead crane beam is adjusted, the elevation of the upper surface of the overhead crane beam is remeasured, and a layer of steel mesh is installed on the upper surface of the overhead crane beam. A leveling layer is made on the upper surface of the overhead crane beam according to the rail top elevation. The thickness of the leveling layer is 30~50mm, and the upper surface of the leveling layer is constructed by manual finishing. After the leveling layer reaches the required strength, a layer of composite rubber pad is continued to be laid on the upper surface of the concrete overhead crane beam, and the overhead crane track is installed on top of the composite rubber pad. After the track straightness adjustment is completed, the track pressure plate and bolts are installed, and the laying operation is completed at this time.

[0003] The defect of the above-mentioned track laying construction is that since the contact surface between the composite rubber pad and the leveling layer is point contact or line contact, surface contact cannot be guaranteed. During the operation of the crane, both point contact and line contact will cause local stress concentration, affecting the strength of the concrete on the upper surface of the crane beam. Once the concrete on the upper surface of the crane beam falls off, a gap will be generated between the crane track and the crane beam. When the crane is in operation, a periodic pulse load will be applied to the track beam, causing the crane track pressure plate bolts to loosen. In addition, the leveling layer is manually smoothed, and the flatness accuracy is difficult to accurately control, and it is impossible to meet the high-precision crane track installation requirements.

[0004] Therefore, the present invention provides a high-precision overhead crane track installation method for hydrometallurgy to solve the above technical defects. Summary of the Invention

[0005] The purpose of the present invention is to address the problems existing in the prior art and provide a method for installing high-precision overhead crane tracks for hydrometallurgy, which solves the problems that the existing overhead crane track installation method makes the overhead crane track susceptible to impact, the pressure plate bolts easily loosen, and the manual finishing accuracy of the leveling layer is difficult to control, thus failing to meet the requirements for high-precision overhead crane track installation.

[0006] To this end, the present invention adopts the following technical solutions: A method for installing a high-precision overhead crane track for hydrometallurgy, comprising the following steps: A steel plate is installed above the concrete overhead crane beam; the steel plate is set horizontally; Install the pad and rail on top of the steel plate in sequence; Install track pressure plates symmetrically on both sides of the track; Furthermore, the rail pressing plate is provided with a slot on the side of the corresponding rail, and the slot is in mortise and tenon contact with the rail; Fix the track pressing plate, steel plate and concrete crane beam from top to bottom by bolts in sequence; Symmetrically install adjusting nuts below the steel plate. The adjusting nuts are threadedly connected to the bolts. Use the adjusting nuts to adjust the elevation and levelness of the steel plate; the bolts are connected to the top of the track pressing plate through compression nuts, to the bottom of the steel plate through adjusting nuts, and to the top of the concrete crane beam through fixing nuts. The bottom of the adjusting nut contacts the top of the fixing nut; Install side plates along the edge of the concrete crane beam; the side plates are arranged vertically; Detect the elevation of the upper surface of the steel plate again, and use the adjusting nuts to adjust the steel plate to a horizontal state; Pour grouting material into the space enclosed by the concrete crane beam, steel plate and side plates to form a leveling layer. The height of the leveling layer is higher than the lower surface of the steel plate and lower than the upper surface of the steel plate; Furthermore, the centers of the concrete crane beam, leveling layer, steel plate, backing plate and track are all located on the same vertical plane.

[0007] The beneficial effects of the present invention are as follows: The present invention can accurately adjust the elevation of the steel plate according to the adjusting nuts, improve the installation accuracy of the track, and install the track above the steel plate. Since the yield strength of the steel plate is stronger than that of the concrete, when the crane is running, the crane track is continuously impacted by the load. Installing the steel plate can avoid the problem of concrete shedding caused by dynamic load. The track and the steel plate are in close contact, achieving the purpose of improving the installation accuracy of the track and enabling the crane to run stably; specifically: 1. The lower surface of the crane track of the present invention is closely attached to the steel plate, avoiding the loosening problem between the track and the installation surface caused by stress concentration due to point contact through surface contact; 2. The elevation of the crane track in the vertical direction of the present invention can be controlled with high precision, thereby reducing the local stress of the crane track during actual operation. Description of the Drawings

[0008] Figure 1 It is a schematic installation structure diagram of the present invention; [[ID=Z7]] Figure 2 It is a schematic connection structure diagram of the track and the track pressing plate of the present invention.

[0009] In the figure, 1-concrete crane beam, 2-compression nut, 3-adjusting nut, 4-fixing nut, 5-bolt, 6-leveling layer, 7-steel plate, 8-backing plate, 9-track, 10-track pressing plate, 11-side plate. Specific Embodiment

[0010] The technical solutions of the present invention will be described in detail below in conjunction with the drawings and the implementation methods.

[0011] As Figure 1 and 2As shown, a method for installing a high-precision overhead crane track for hydrometallurgy includes the following steps: First, a steel plate 7 is horizontally installed on the upper surface of the concrete overhead crane beam 1, and a pad 8 and a track 9 are installed at the center of the steel plate 7, wherein the pad 8 plays a shock-absorbing role; and track pressure plates 10 are symmetrically installed on both sides of the track 9, and the track pressure plates 10 are provided with slots corresponding to the sides of the track 9, and the slots are in mortise and tenon contact with the track 9; specifically, the thickness of the steel plate 7 is 20 mm, and the thickness of the leveling layer 6 is 30~50 mm; the thickness of the leveling layer 6 is determined as follows: the elevation of the upper surface of the overhead crane beam is measured, and the thickness of the leveling layer 6 at the highest point shall not be less than 30 mm, otherwise the leveling layer 6 is very likely to crack during actual use.

[0012] Secondly, the bolt 5 is passed through the track pressure plate 10, the steel plate 7 and the concrete crane beam 1 from top to bottom, and the adjusting nut 3 is installed under the steel plate 7. According to the actual needs of the on-site operation, the elevation and level of the steel plate 7 are adjusted using the adjusting nut 3; specifically, the bolt 5 is connected to the top of the track pressure plate 10 through the clamping nut 2, connected to the bottom of the steel plate 7 through the adjusting nut 3, and connected to the top of the concrete crane beam 1 through the fixing nut 4, and the bottom of the adjusting nut 3 is in contact with the top of the fixing nut 4; wherein, the clamping nut 2 is used to fix the position of the track pressure plate 10 and the steel plate 7 and the track pressure plate 10; the adjusting nut 3 is used to adjust the elevation and level of the steel plate 7; and the fixing nut 4 plays the role of fixing the bolt 5.

[0013] Next, the side plates 11 are installed along the edges of the concrete overhead crane beam 1 , and the elevation of the upper surface of the steel plate 7 is re-measured using existing testing equipment. If there is an error with the standard, the elevation of the upper surface of the steel plate 7 is further accurately adjusted using the adjusting nut 3 .

[0014] Finally, after the elevation adjustment is completed, CGM high-strength grouting material is poured into the space formed by the concrete crown beam 1, steel plate 7, and side plate 11 to form a leveling layer 6, and the height of the leveling layer 6 should be higher than the lower surface of the steel plate 7 and lower than the upper surface of the steel plate 7; if the thickness of the leveling layer 6 is lower than the lower surface of the steel plate 7, the contact surface between the steel plate 7 and the concrete crown beam 1 cannot be guaranteed to be in surface contact, and the thickness of the leveling layer 6 is between the upper and lower surfaces of the steel plate 7. The micro-expansion characteristics of the CGM grouting material are used to make the leveling layer 6 and the lower surface of the steel plate 7 completely in contact. At this time, the two are in surface contact, avoiding point contact to cause dynamic load stress concentration, resulting in loose defects between the track 9 and the steel plate 7.

Claims

1. A method for installing a high-precision overhead crane track for hydrometallurgy, characterized in that, It includes the following steps: Install a steel plate (10) above the concrete crane beam (1); Install a backing plate (8) and a track (9) in sequence above the steel plate (7); Symmetrically install track clamping plates (10) on both sides of the track (9); Fix the track clamping plate (10), the steel plate (10) and the concrete crane beam (1) from top to bottom through bolts (5) in sequence; Symmetrically install adjusting nuts (3) below the steel plate (7), which are threadedly connected with the bolts (5), and use the adjusting nuts (3) to adjust the elevation and levelness of the steel plate (7); Install side plates (11) along the edge of the concrete crane beam (1); Detect the elevation of the upper surface of the steel plate (7) again, and use the adjusting nut (3) to adjust the steel plate (7) to a horizontal state; ​ 2. A method for providing a high-precision overhead crane track for hydrometallurgy according to claim 1, characterized in that ​ 3. A method for providing a high-precision overhead crane track for hydrometallurgy according to claim 1, characterized in that, ​ 4. A method for providing a high-precision overhead crane track for hydrometallurgy according to claim 3, characterized in that, ​ 5. A method for providing a high-precision overhead crane track for hydrometallurgy according to claim 1, characterized in that, ​ 6. A method for providing a high-precision overhead crane track for hydrometallurgy according to claim 1, characterized in that, ​ 7. A method for providing a high-precision overhead crane track for hydrometallurgy according to claim 1, characterized in that, ​ 8. A method for providing a high-precision overhead crane track for hydrometallurgy according to claim 1, characterized in that, ​

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