Mechanism for sliding platform deck in device for vertically erecting high-pressure heater

Abstract

The utility model discloses a mechanism for sliding a carrying table in a device for vertically erecting a high-pressure heater, which comprises a fixed pulley and an inhaul cable, the fixed pulley is fixed on a foundation or a track below a crane, one end of the inhaul cable is fixed at the rear end of the carrying table, and the other end of the inhaul cable is fixed on the carrying table. When the crane lifts the front end of the high-pressure heater upwards, the inhaul cable is pulled to enable the carrying table where the high-pressure heater is placed to slide forwards at the same time. The lifting device has the advantages that the front end of the high-pressure heater can be lifted through the crane by arranging the inhaul cable and the fixed pulley, so that the rack for horizontally placing the high-pressure heater moves forwards along with the crane, the front end of the high-pressure heater can be lifted approximately vertically, and the front end of the high-pressure heater is effectively prevented from shaking back and forth in the lifting process; the safe hoisting of the heavy long-tank-shaped high-pressure heater is ensured; the structure is simple and operation is convenient.

Description

Technical Field

[0001] The utility model relates to a mechanism for sliding a carrier in a device for vertically erecting a high-voltage heater, belonging to the technical field of thermal power installation. Background Art

[0002] At present, domestic power construction has turned to thermal power plants with 1000MW and higher parameters, and 1000MW ultra-supercritical unit projects have become the mainstream. With the continuous development of power construction projects and the continuous improvement of design levels, traditional horizontal high-pressure heaters cannot meet the needs of ultra-supercritical unit projects and have gradually been replaced by new vertical high-pressure heaters. The installation location has also changed greatly, from being arranged in the steam engine room to being arranged on the boiler steel frame, and the weight and external dimensions have also increased a lot (taking the 2×1 million kilowatt expansion and upgrading project of Changan Yiyang Power Generation Co., Ltd. as an example, the maximum weight of the high-pressure heater is 325.5 tons and the maximum height is 16200mm). Due to the compact structure and small space of the boiler steel frame K0 / K1, G1-G6, the truck crane or crawler crane cannot meet the hoisting of the vertical high-pressure heater, and it does not have the conditions for the steam engine room aerial hoisting. Therefore, the original horizontal high-pressure heater hoisting technology is no longer applicable to the hoisting of the vertical high-pressure heater, so it is necessary to study a set of hoisting solutions suitable for the vertical high-pressure heater arranged on the boiler steel frame. To this end, the applicant carried out research on the vertical high-voltage heater hoisting system based on the 2×1 million kilowatt capacity expansion and upgrading project of Changan Yiyang Power Generation Co., Ltd.

[0003] Since the high-pressure heater is a long tank with large volume and heavy weight, and it is vertically suspended on the beam frame, with the lower end about ten meters above the ground, it is necessary to first vertically erect the heavy and bulky horizontal high-pressure heater (it can only be transported to the site in a horizontal position and temporarily stored on site in a horizontal position) and then vertically lift it. The whole process cannot cause the tank to sway significantly, otherwise, it will be difficult to control due to its heavy weight, causing damage to related facilities or even major accidents. Therefore, in the case where the existing lifting facilities cannot be used, it is necessary to build a lifting system that is safe and reliable, simple and efficient to operate, and easy to remove after assembly. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to use a crane to lift the front end of a heavy and bulky long can-shaped high-pressure heater lying on a carrier until the entire high-pressure heater is vertically erected, so that the carrier can slide forward along with it, so that the rear end of the high-pressure heater can gradually slide to the bottom of the crane as the front end is vertically lifted.

[0005] In view of the above problems, the technical solution proposed by the utility model is:

[0006] A mechanism for sliding a carrier in a device for vertically erecting a high-voltage heater comprises a fixed pulley and a cable, wherein the fixed pulley is fixed on a foundation or track below a crane, one end of the cable is fixed to the rear end of the carrier, and the other end can be wound around the fixed pulley from under the fixed pulley and then fixed upward to the front end of the high-voltage heater. When the crane lifts up the front end of the high-voltage heater, the cable is pulled to enable the carrier on which the high-voltage heater is placed to slide forward.

[0007] There are two fixed pulleys, which are fixed to the outer sides of the left and right tracks through pulley frames respectively. There are two cables, and the rear ends of the two cables are fixed to the two sides of the rear end of the carrier respectively, and the front ends of the two cables can be fixed to the front hanging ear columns on both sides of the front end of the high-pressure heater respectively.

[0008] The fixed pulley is installed below the front hanging ear column on the inner side of the pulley frame.

[0009] Fixed columns are arranged on both sides of the rear end of the carrier.

[0010] A front end section or a rear end section of the cable is an elastic section with elasticity.

[0011] A tension spring is arranged on the fixing column, one end of the tension spring is connected to the fixing column, and the other end is connected to the pull cable. Beneficial Effects

[0012] 1. By setting the cable and fixed pulley, the front end of the high-voltage heater can be lifted by the crane, so that the stand on which the high-voltage heater is placed horizontally can move forward with it, so that the front end of the high-voltage heater can be lifted nearly vertically, effectively avoiding the front end of the high-voltage heater from swinging greatly during the lifting process, and ensuring the safe lifting of the heavy long tank-shaped high-voltage heater;

[0013] 2. Simple structure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of a mechanism for sliding the platform including a cable and a fixed pulley in the first embodiment;

[0015] Figure 2 It is a plan view of a mechanism for sliding the platform including a cable and a fixed pulley in the second embodiment;

[0016] Figure 3 The slide including the platform and track on which the pump application is based;

[0017] In the figure: 1, cable; 101, elastic section; 2, fixed pulley; 3, pulley frame; 4, fixed column; 5, tension spring; 6, carrier; 601, rear support; 6011, groove; 602, front support; 7, track; 701, roller; 8, crane; 801, sling; 9, high-pressure heater; 901, front hanging ear column; 902, rear hanging ear column. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] like Figure 3 As shown, the present application is based on a slide in a device developed this time to cooperate with a crane to make a high-voltage heater stand vertically. The slide includes a carrier 6 and a track 7 for the carrier 6 to slide. A rear support 601 is provided at the rear end of the carrier 6. There are symmetrically arranged grooves 6011 with an upward opening on both sides of the rear support 601. The rear hanging ear columns 902 arranged on both sides of the rear end of the high-voltage heater can be placed in the grooves 6011 on both sides of the rear support 601, respectively. The front end of the track is located in the lower area of ​​the crane 8. When the crane continuously lifts the front end of the high-voltage heater 9 upward above the front end of the high-voltage heater 9, the high-voltage heater 9 can rotate around the rear hanging ear column 902. At the same time, the rear end of the high-voltage heater 9 can slide forward continuously to the bottom of the crane under the action of external force with the carrier 6, so that the high-voltage heater 9 stands vertically. Here, the crane 8 hangs the front hanging ear columns 901 on both sides of the front of the high-voltage heater 9 by ropes to lift the front end of the high-voltage heater 9 upward. The platform 6 continuously slides forward under the action of external force, which means that while the front end of the high-pressure heater 9 is lifted upward, a thrust or a pull is applied to the platform 6, so that the rear end of the high-pressure heater 9 continuously moves directly under the crane 8. Through the above arrangement and the auxiliary action of external force, the large and heavy long can-shaped high-pressure heater 9 can be erected smoothly.

[0020] The crane described here is a commercially available Rausinger hydraulic lifting device.

[0021] The front end of the carrier 6 is provided with a front support 602, and the front support 602 is provided with a horizontal groove 6011 for the high-voltage heater 9 to lie. In this way, the high-voltage heater 9 can be horizontally placed on the front support 602 and the rear support 601.

[0022] The track 7 is divided into a left track 7 and a right track 7. As an option, a plurality of rollers 701 are provided inside the left track 7 and the right track 7, and the carrier 6 is pressed on the rollers 701 and slides on the rollers 701, so that the sliding resistance of the carrier 6 is small. Of course, the carrier 6 can also be pressed on a flat plate coated with a lubricant (not shown in the figure) to make the carrier slide on the track 7 with a flat plate. Embodiment 1

[0023] like Figure 1As shown, a mechanism for sliding a carrier in a device for vertically erecting a high-voltage heater includes a fixed pulley 2 and a cable 1. The fixed pulley 2 is fixed on a foundation or track 7 below a crane 8. One end of the cable 1 is fixed to the rear end of the carrier 6, and the other end can be wound around the fixed pulley 2 from under the fixed pulley 2 and then fixed to the front end of the high-voltage heater 9. When the crane 8 lifts the front end of the high-voltage heater 9 upward, the lifted front end of the high-voltage heater 9 pulls the cable 1 so that the carrier on which the high-voltage heater 9 is placed can slide forward on the track, thereby making the rear end of the high-voltage heater 9 constantly approach and finally be located directly below the crane 8. In this way, the front end of the high-voltage heater 9 can be lifted nearly vertically upward under the action of the crane, ensuring that the front end of the high-voltage heater 9 will not shake significantly during the lifting process, and the vertical erection of the high-voltage heater 9 can be smoothly achieved.

[0024] There are two fixed pulleys 2, which are fixed to the outside of the left and right tracks 7 through the pulley frame 3, and there are two cables 1. The rear ends of the two cables 1 are fixed to the two sides of the rear end of the platform 6, and the front ends of the two cables 1 can be fixed to the front hanging ears 901 on both sides of the front end of the high-pressure heater 9. When lifting, the sling 801 of the crane is also hung on the front hanging ears 901 on both sides of the front end of the high-pressure heater 9. The fixed pulley 2 is installed below the front hanging ears 901 on the inner side of the pulley frame 3. In this way, it does not affect the forward sliding of the platform 6, and can basically ensure that the sliding groove of the fixed pulley 2 and the cable 1 are on the same plane.

[0025] Fixed columns 4 are provided on both sides of the rear end of the carrier 6 .

[0026] The front end or rear end of the cable 1 is an elastic section 101. Since we want to make the front end of the high-voltage heater rise vertically as much as possible, and the height of the front end of the high-voltage heater rises inconsistent with the horizontal sliding distance of the platform in the initial stage and the later stage, a section of a cable 1 with strong elasticity is used at the front and rear ends of the cable 1 or a tension spring 5 is set on the fixed column 4, which can automatically adjust the length of the cable during the erection process, so that the distance of the platform 6 sliding forward is coordinated with the height of the front end of the high-voltage heater vertically rising, so as to make the front end of the high-voltage heater as close to vertical rising as possible. Embodiment 2

[0027] like Figure 2 As shown, the difference from the first embodiment is that a tension spring 5 is provided on the fixed column 4, one end of the tension spring 5 is connected to the fixed column 4, and the other end is connected to the cable 1, thereby replacing the elastic section 101 provided at the front end or rear end of the cable 1.

[0028] The above embodiments are only used to more clearly describe the present invention and cannot be regarded as limiting the protection scope of the present invention. Any modifications in equivalent forms should be regarded as falling within the protection scope of the present invention.

Claims

1. A mechanism for sliding a carrier in a device for vertically erecting a high-voltage heater, characterized in that: The invention comprises a fixed pulley (2) and a cable (1), wherein the fixed pulley (2) is fixed on a foundation or a track (7) below a crane (8), one end of the cable (1) is fixed on a rear end of a carrier (6), and the other end can be passed under the fixed pulley (2) and then wound around the fixed pulley (2) and then fixed upward to a front end of a high-voltage heater (9). When the crane (8) lifts the front end of the high-voltage heater (9) upward, the cable (1) is pulled so that the carrier on which the high-voltage heater (9) is placed can slide forward.

2. The mechanism for sliding the carrier in the device for vertically erecting the high-pressure heater according to claim 1, characterized in that: There are two fixed pulleys (2), which are fixed to the outside of the left and right tracks (7) through pulley frames (3), respectively. There are two cables (1), the rear ends of the two cables (1) are fixed to the two sides of the rear end of the carrier (6), respectively, and the front ends of the two cables (1) can be fixed to the front hanging ear columns (901) on both sides of the front end of the high-pressure heater (9).

3. The mechanism for sliding the carrier in the device for vertically erecting the high-pressure heater according to claim 2, characterized in that: The fixed pulley (2) is installed below the front hanging ear column (901) on the inner side of the pulley frame (3).

4. The mechanism for sliding the carrier in the device for vertically erecting the high-pressure heater according to claim 2, characterized in that: Fixed columns (4) are arranged on both sides of the rear end of the carrier (6).

5. The mechanism for sliding the carrier in the device for vertically erecting a high-pressure heater according to claim 2, characterized in that: A front end section or a rear end section of the cable (1) is an elastic section (101) having elasticity.

6. The mechanism for sliding the carrier in the device for vertically erecting the high-pressure heater according to claim 4, characterized in that: A tension spring (5) is provided on the fixed column (4), one end of the tension spring (5) is connected to the fixed column (4), and the other end of the tension spring (5) is connected to the pull cable (1).

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