Online pump changing device and method for converter valve cooling system

Abstract

The invention discloses an online pump changing device and method for a converter valve cooling system, and belongs to the technical field of pump changing. The device comprises a liftable slide rail flat car, an extension frame and a tray, the liftable sliding rail flat car comprises a car frame body, double rows of flat car sliding rails installed in the length direction of the car frame body and a sliding plate installed on the double rows of flat car sliding rails, and the width of the sliding plate is larger than that of the car frame body. The width side of the frame body is connected with an extension frame, the extension frame comprises an extension frame body and double rows of extension sliding rails installed on the extension frame body, and the connecting ends of the double rows of extension sliding rails and the double rows of flat car sliding rails are of wedge-shaped structures; the length side of the frame body is connected with a tray, and the height of the tray is within the lifting height range of the liftable sliding rail flat car. The device is convenient and efficient to assemble and disassemble, through effective cooperation of the liftable sliding rail flat car, the extension frame and the tray, on-line rapid replacement and turnover of a pump body in a limited space of valve cooling equipment are achieved, manpower input is reduced, and the pump replacement time is shortened.

Description

Technical Field

[0001] This invention relates to the field of pump replacement technology, and in particular to an online pump replacement device and method for a converter valve cooling system. Background Technology

[0002] The converter valve cooling system (referred to as valve cooling) is used to dissipate heat from the converter valves and is an indispensable key auxiliary equipment in high-voltage direct current transmission projects. Its main circulating pump is the core power component of the cooling system. If a failure occurs, the cooling system will stop, causing the converter valve system to trip, interrupting power supply, and resulting in significant economic losses and impacts. Therefore, converter stations require that each valve-cooled main circulating pump must have one operating and one standby pump. If one main circulating pump fails, it must be immediately switched to the other main circulating pump, and the failed pump must be replaced in a timely manner. The mainstream design of valve-cooled main circulating pumps is a large horizontal non-direct-coupled pump, with the pump body and motor connected by a coupling. The overall weight is approximately 3 to 5 tons. In case of failure, the pump body and motor are repaired or replaced separately. The pump body weighs approximately 600 kg to 1200 kg, has an irregular shape, and its center of gravity is biased towards the volute side.

[0003] The main problems currently encountered in online replacement of the main circulation pump in the converter valve cooling system are as follows: The system is energized, and there is a risk of electric shock during online maintenance. Some converter stations have explicitly prohibited the use of gantry cranes, electric hoists, and other elevated hoisting methods for pump maintenance and replacement.

[0004] The equipment modules in the valve cooling equipment room are arranged in a compact manner, and the maintenance passage is narrow. It is difficult for personnel to exert force in the small space, resulting in low efficiency. Replacing a single pump requires 8 to 10 people and takes 2 hours, which is costly.

[0005] The two main circulating pumps of a single valve-cooled unit are based on the same modular base layout. The base is about 3 meters wide, and fixed cable trays are laid on both sides, with an overall width of about 4.5m to 5m. If a gantry crane solution is adopted, at least 1.2m of space must be reserved on each side, so the span of the gantry crane should be at least 5.7m. This makes the gantry crane heavy and large, difficult to move, and difficult to implement in the limited space between valve-cooled equipment, as well as difficult to turn. If one leg of the gantry crane is placed on the modular base between the two main circulating pumps, and the other leg is placed on the ground, it will cause the gantry crane to operate with different legs, which poses a greater safety risk. Some converter stations have explicitly prohibited this solution.

[0006] The solution of combining slide rails and slide plates is only applicable to specific situations where slide rails can be laid in the shaping table. Its applicability is limited and it still does not solve problems such as pump replacement, turnover, and complex application scenarios. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide an online pump replacement device and method for a converter valve cooling system, which realizes the online rapid replacement of the main circulation pump body in the limited space of the valve cooling equipment room, greatly reducing manpower input and shortening the pump replacement time.

[0008] To achieve the above objectives, the present invention is implemented using the following technical solution: On one hand, the present invention provides an online pump changing device for a converter valve cooling system, including a liftable slide rail flatbed cart, an extension rack, and a tray; The liftable flatbed cart includes a frame body, double-row flatbed cart rails installed along the length of the frame body, and a sliding plate installed on the double-row flatbed cart rails. The width of the sliding plate is greater than the width of the frame body, and the center of the sliding plate is located on the axis of the frame body. The frame body is connected to the width side of the extension frame. The extension frame includes an extension frame body and a double row of extension slide rails mounted on the extension frame body. The double row of extension slide rails are connected to the double row of flatbed slide rails, and the connection end is a wedge-shaped structure. The frame body is connected to a tray along its length, and the height of the tray is within the lifting height range of the liftable rail flatbed.

[0009] The device of this invention is easy and efficient to assemble and disassemble, and realizes a smooth transition of the slide plate from the frame body to the extension frame. It facilitates seamless docking between the slide plate and the tray surface, making it easier to push the pump body. Through the effective cooperation of the liftable slide rail flatbed, the extension frame and the tray, the online rapid replacement and turnover of the main circulation pump body in the limited space of the valve cooling equipment room is realized, which greatly reduces manpower input and shortens the pump replacement time.

[0010] Optionally, the two ends and sides of the connection end between the double-row extended slide rail and the double-row flatbed slide rail are wedge-shaped structures. The edges of the wedge-shaped structure are rounded, which realizes the smooth transition of the skateboard from the double-row flatbed slide rail to the double-row extended slide rail, and avoids the sharp corners, right-angle edges and misaligned edges of the double-row extended slide rail ends from causing the skateboard to jam.

[0011] Optionally, the frame body is provided with threaded holes, and the slide plate is provided with through holes corresponding to the positions of the threaded holes. The threaded holes and through holes are fixed by end eye bolts. The threaded holes and through holes are respectively located on the extension frame side and the handrail side. The threaded holes and through holes are fixed by end eye bolts to prevent the slide plate from sliding due to reaction force when the pump body is pushed towards the slide plate or when the slide plate is pushed towards the handrail, causing the pump body to fall and injure people or damage the pump body.

[0012] Optionally, the slide plate is provided with slide plate fixing holes for mounting the pump body, and the tray surface is provided with tray fixing holes for mounting the pump body.

[0013] Optional features also include armrests and casters; The handrail is installed on the side of the frame body away from the extension frame, and the casters are installed at the bottom of the frame body.

[0014] Optional features also include a lifting pedal and adjustable support feet for the extension rack; The lifting pedal is installed on the side of the frame body away from the extension frame, and the lifting pedal is driven to lift the liftable slide rail flatbed car through a lifting hydraulic power device; the adjustable support feet of the extension frame are installed at the bottom of the extension frame body.

[0015] Optionally, the frame body is provided with a pin hole, and the extension frame body is provided with a pin that mates with the pin hole.

[0016] Optionally, the frame of the tray has a cross-shaped structure along its length and a square structure along its width.

[0017] Optionally, the maximum lifting height of the liftable slide rail flatbed is greater than the sum of the heights of the valve cooling body base and the main circulation pump base.

[0018] On the other hand, the present invention provides a pump changing method for an online pump changing device in a converter valve cooling system, comprising: Place the liftable sliding rail flatbed trolley on the side of the pump body to be disassembled, with the sliding plate parallel to the bottom of the pump body to be disassembled; Connect the extension frame to the liftable slide rail flatbed trolley by crossing the cable tray box, and slide the slide plate onto the extension frame to dock with the pump body base to be disassembled; Move the pump body to be disassembled onto the slide plate and secure it. Slide the slide plate back onto the frame body and remove the extension frame. Move the liftable slide rail flatbed to the work area, connect the pallet to the liftable slide rail flatbed, with the bottom of the slide plate close to the surface of the pallet, move the pump body to be disassembled onto the pallet and fix it, move the pallet to the spare pump room, and complete the disassembly of the pump body to be disassembled. The installation process of the pump body to be installed is a reverse disassembly process, which completes the installation of the pump body to be installed.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The device of this invention is easy to assemble and disassemble and is efficient. The connection end between the double-row extension slide rail and the double-row flatbed slide rail is a wedge-shaped structure, which realizes the smooth transition of the slide plate from the frame body to the extension frame. The width of the slide plate is greater than the width of the frame body, which facilitates the seamless docking of the slide plate and the tray surface, making the pump body easier to move. Through the effective cooperation of the liftable slide rail flatbed, extension frame and tray, the online rapid replacement and turnover of the main circulation pump body in the limited space of the valve cooling equipment room is realized, which greatly reduces the manpower input and shortens the pump replacement time. Attached Figure Description

[0020] Figure 1The diagram shown is a schematic representation of the installation structure of the liftable sliding rail flatbed cart and extension frame in one embodiment of the present invention. Figure 2 The diagram shown is a structural schematic of the liftable sliding rail flatbed vehicle of the present invention in one embodiment; Figure 3 The diagram shown is a structural schematic of the extension frame of the present invention in one embodiment; Figure 4 The diagram shown is a schematic representation of the mounting structure of the pin hole and pin in one embodiment of the present invention. Figure 5 The diagram shown is a schematic representation of the installation structure of the double-row extended slide rail and the double-row flatbed slide rail in one embodiment of the present invention. Figure 6 The diagram shown is a structural schematic of the liftable sliding rail flatbed vehicle of the present invention in another embodiment; Figure 7 The diagram shown is a structural schematic of the tray of the present invention in one embodiment; Figure 8 The diagram shown is a schematic flowchart of the pump changing method in one embodiment of the online pump changing device for the converter valve cooling system of the present invention. Figure 9 The diagram shown is a structural schematic of the extension frame and the liftable slide rail flatbed vehicle for pump maintenance in one embodiment of the present invention; Figure 10 The diagram shown is a structural schematic of the pump body removal or installation device of the present invention in one embodiment; Figure 11 The diagram shown is a structural schematic of the pump body removal or installation and transfer according to one embodiment of the present invention; Figure 12 The diagram shown is a schematic representation of the pump transfer to the tray in one embodiment of the present invention; In the diagram: 1-Liftable sliding rail flatbed trolley; 11-Chassis body; 111-Threaded hole; 12-Slide plate; 121-Slide plate fixing hole; 13-Lifting pedal; 14-Handrail; 15-End lifting eye bolt; 16-Wheel caster; 17-Double row flatbed trolley slide rail; 18-Pin hole; 2-Extension rack; 21-Extension rack adjusting support; 22-Pin; 23-Double row extension slide rail; 231-Double row extension slide rail wedge end face; 232-Slide rail mating assembly; 3-Pallet; 31-Pallet fixing hole; 32-Electric forklift hole; 33-Manual hydraulic forklift hole; 4-Main circulation pump main module; 41-Main module base; 42-Main circulation pump base; 43-Pump body; 44-Cable tray box; Detailed Implementation

[0021] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0022] The term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Example 1

[0024] This embodiment introduces an online pump changing device for a converter valve cooling system, including a liftable slide rail flatbed trolley 1, an extension frame 2, and a tray 3.

[0025] like Figure 2 As shown, the liftable flatbed trolley 1 includes a frame body 11, threaded holes 111, a sliding plate 12, a sliding plate fixing hole 121, a lifting pedal 13, a handrail 14, an end eye bolt 15, casters 16, double-row flatbed trolley rails 17, and a pin hole 18.

[0026] like Figure 3 As shown, the extension frame 2 includes an extension frame body, an extension frame adjusting support 21, a pin 22, a double-row extension slide rail 23, and a double-row extension slide rail wedge-shaped end face 231.

[0027] like Figure 7 As shown, the pallet 3 includes a pallet fixing hole 31, an electric forklift hole 32, and a manual hydraulic forklift hole 33.

[0028] like Figure 6 As shown, the double-row flatbed trailer slide rail 17 is installed along the length of the frame body 11, and the slide plate 12 is installed on the double-row flatbed trailer slide rail 17. The frame body 11 is provided with threaded holes 111, and the slide plate 12 is provided with through holes corresponding to the positions of the threaded holes 111, so as to facilitate the fixation of the slide plate 12 to the frame body 11. The threaded holes 111 and the through holes are fixed by end eye bolts 15. The end eye bolts 15 are used to facilitate manual handling and disassembly.

[0029] The slide plate 12 is provided with a slide plate fixing hole 121 for mounting the pump body. The slide plate fixing hole 121 corresponds to the pump body support corner mounting hole, which facilitates the fixing of the pump body to the slide plate 12 and prevents the pump body from slipping or tipping over during transportation. The pump body support foot mounting hole is a waist hole, which facilitates the centering when fixing it to the slide plate 12.

[0030] In this embodiment, the width of the slide plate 12 is greater than the width of the frame body 11, and the center of the slide plate 12 is located on the axis of the frame body 11. That is to say, both sides of the slide plate 12 extend beyond the frame body 11, which facilitates seamless docking between the slide plate 12 and the surface of the tray 11, making it easier to push the pump body.

[0031] Handrail 14 is installed on the side of the frame body 11 away from the extension frame 2, and casters 16 are installed at the bottom of the frame body 11 to facilitate the movement of the liftable sliding rail flatbed 1.

[0032] In this embodiment, threaded holes and through holes are respectively located on the extension frame side and the handrail side. The threaded holes and through holes are fixed by end eye bolts to prevent the pump body from falling and injuring personnel or being damaged when the pump body is pushed against the slide plate or the slide plate is pushed against the handrail due to reaction force. The casters are equipped with fixing mechanisms to prevent the movable slide rail flatbed from moving during pump replacement. The lifting pedal 13 is installed on the side of the frame body 11 away from the extension frame 2. The lifting pedal 13 drives the liftable slide rail flatbed 1 to rise and fall through the lifting hydraulic power device. The maximum rising height of the liftable slide rail flatbed 1 is greater than the sum of the heights of the valve cooling body base and the main circulation pump base. The height of the slide plate 12 off the ground is adjustable from 350mm to 500mm, which can meet the combined height of various valve cooling body bases and main circulation pump bases, and realize that the slide plate 12 and the main circulation pump base are at the same height.

[0033] like Figure 1 and Figure 4 As shown, the frame body 11 is provided with a pin hole 18 for connecting the extension frame 2. The liftable slide rail flatbed 1 and the extension frame 2 are connected by a pin, which is convenient and efficient for assembly and disassembly.

[0034] like Figure 1 and Figure 4 As shown, the extension frame body is provided with a pin 22 for connecting to the frame body 11.

[0035] The extension frame body is equipped with double-row extension slide rails 23, which are connected to double-row flatbed trolley slide rails 17. The two end faces and sides of the connection end are wedge-shaped, and the edges of the wedge-shaped structure are rounded. Figure 5 As shown, the process of sliding the skateboard 12 from the double-row flatbed slide rail 17 to the double-row extended slide rail 23 is realized smoothly, avoiding the sharp corners, right-angle edges, and misaligned edges of the double-row extended slide rail 23 from causing the skateboard to get stuck.

[0036] The extension frame adjustable support 21 is installed at the bottom of the extension frame body. The adjustable height of the extension frame adjustable support 21 is 200mm~500mm, which can form effective support on the base of the main module or on the ground, ensuring that the pump body does not tilt or tip over when it moves back and forth with the slide plate.

[0037] The tray 3 is used to transfer the pump body and is connected to the length side of the frame body 11. The height of the tray 3 is within the lifting height range of the liftable slide rail flatbed 1. After the height of the liftable slide rail flatbed 1 is connected to the tray 3, it can be adjusted to the same plane, so that the surface of the tray 11 is seamlessly connected to the slide plate 12.

[0038] In this embodiment, the pallet adopts a new all-aluminum alloy frame and an aluminum alloy plate tabletop. The tabletop size is similar to that of a skateboard, making it lightweight, easy to move, and suitable for operation in confined spaces.

[0039] The surface of the tray 3 is provided with tray fixing holes 31 for mounting the pump body, which are fixed in the same way as the fixing holes 121 of the slide plate.

[0040] The frame of pallet 3 adopts a staggered support structure. The length direction is a cross-shaped structure, with the front and rear supports on the ground, 150mm above the ground. When carrying the pump body, it can be transferred using a manual hydraulic forklift. Simply pass the manual hydraulic forklift through the manual hydraulic forklift hole 33 to transfer it. The width direction is a square structure, with the front and rear supports on the ground, parallel to the ground, which can effectively bear the load. When carrying the pump body, it can be transferred using an electric forklift. Simply pass the electric forklift through the electric forklift hole 32 to transfer it.

[0041] The device in this embodiment is easy and efficient to assemble and disassemble. Through the effective cooperation of the liftable slide rail flatbed cart, extension frame and tray, the main circulation pump body can be quickly replaced and rotated online in the limited space of the valve cooling equipment room, which greatly reduces manpower input and shortens the pump replacement time.

[0042] Example 2

[0043] Based on Example 1, this example introduces a pump replacement method for an online pump replacement device in a converter valve cooling system, such as... Figure 8 As shown, the process includes removing the faulty pump body and installing the new pump body. The pump body is moved and moved horizontally using a liftable sliding rail flatbed cart, extension frame, and pallets, enabling rapid pump body replacement within the equipment room. Different pallets are used when removing the faulty pump body and installing the new pump body; for example, pallet A is used to remove the faulty pump body, and pallet B is used to install the new pump body. The specific steps include the following: Step 1: Remove the faulty pump body, specifically: The main circulation pump main unit module 4 includes a main unit module base 41, a main circulation pump base 42, a pump body 43, and a cable tray 44.

[0044] Remove the dust cover and coupling of the faulty main circulation pump in sequence, so that the motor and pump body are separated.

[0045] Remove the connecting bolts of the inlet and outlet flanges of the faulty main circulation pump, pre-compress the corrugated compensator of the outlet pipeline of pump body 43, and at the same time remove the fixing bolts at the bottom of pump body 43 to make pump body 43 free.

[0046] Use a pry bar to rotate the pump body 43 by 90° so that the center of gravity side of the pump body 43 volute faces the passageway side to be prepared for operation.

[0047] Push the liftable slide rail flatbed 1 to the side passage of the pump body 43, adjust its direction so that the slide plate 12 of the liftable slide rail flatbed 1 is parallel to the main circulation pump base 42, and install the extension frame 2 across the cable tray box 44.

[0048] Adjust the lifting pedal 13 to align the slide plate 12 of the liftable flatbed trolley 1 with the main circulation pump base 42 at the same height. Adjust the extension bracket adjusting feet 21 by screwing the threads onto the extension bracket adjusting feet 21 until they are effectively in contact with the main unit module base 41, i.e., the valve cooling body base platform or the ground, so that the feet can effectively support the load on the extension bracket when under pressure. Figure 9 As shown.

[0049] Push the slide plate 12 onto the double-row extended slide rail 23, aligning it with the ground of the main circulation pump base 42. Secure the slide plate 12 with two end eye bolts 15 to prevent it from sliding due to reaction force when the pump body 43 is pushed towards it, causing the pump body 43 to fall and injure personnel or damage the pump body 43. Simultaneously lock the four corner casters 16 of the liftable slide rail flatbed trolley 1 to prevent it from moving. Figure 10 As shown.

[0050] Move the pump body 43 horizontally from the main circulation pump base 42 onto the slide plate 12. If necessary, use a pry bar for assistance. Align the pump body support feet mounting holes with the slide plate fixing holes 121 and secure them. Figure 11 As shown.

[0051] Remove the end eye bolt 15 of the fixed slide plate 12, push the pump body 43, and the slide plate 12 carrying the pump body 43 moves towards the handrail 14. After the end of the slide plate 12 is in place, fix it with the end eye bolt 15.

[0052] Remove extension frame 2, lower the height of liftable rail flatbed trolley 1, and push the pump trolley to an open work area.

[0053] Adjust the height of the liftable flatbed trolley 1 until the slide plate 12 is parallel and at the same height as the unloaded pallet 3. Remove the fixing bolts of the pump body 43's legs, push the faulty pump body 43 from the slide plate 12 onto the pallet 3, align the pump body's leg mounting holes with the pallet fixing holes 31 and secure it. Transfer it to the spare parts room using a forklift. The removal of the faulty pump body is now complete. Figure 12 As shown.

[0054] Step 2: Install the new pump body, specifically: The installation of a new pump body is the reverse of the removal of a faulty pump body.

[0055] Raise the skateboard 12 to be close to and at the same height as the tray 3 carrying the pre-installed new pump body 43, lock the four corner casters 16, and fix the skateboard 12.

[0056] The new pump body 43 is pushed from the tray 3 onto the slide plate 12. The position of the pump body 43 is adjusted so that the center of gravity is entirely on the liftable slide rail flatbed 1, and then fixed to the slide plate 12 through the pump body support foot mounting holes.

[0057] Unlock the four-corner casters 16, push the liftable slide rail flatbed 1 to the aisle next to the pre-installed pump 43, adjust the direction so that the platform of the liftable slide rail flatbed 1 is parallel to the bottom of the pump body 43, and install the extension bracket 2 across the cable tray box 44.

[0058] Step on the lifting pedal 13 to adjust the slide plate 12 to be parallel to the main circulation pump base 42 and at the same height. Adjust the extension bracket adjustment feet 21 to adjust the height of the feet to effectively fit the valve cooling body base or the ground. Lock the four corner casters 16.

[0059] Loosen the end eye bolts 15, push the slide plate 12 carrying the new pump body 43 to the front end of the extension frame 2 so that it aligns with the ground of the main circulation pump base 43, and fix the slide plate 12 with the two end eye bolts 15.

[0060] Move the new pump body 43 from the slide plate 12 onto the main circulation pump base 42, and adjust the mounting holes of the new pump body support feet to align with the bolt holes of the main circulation pump base.

[0061] Release the compression of the bellows compensators in the inlet and outlet pipelines of the pump body in sequence, assemble the sealing gaskets between the flanges, tighten the perforated flange bolts in sequence, install the coupling for alignment, and fix the new pump body support feet on the pump body base. At this point, the installation of the new pump body is complete.

[0062] This embodiment utilizes two adapter trays to quickly relocate faulty pumps and place new pumps in confined spaces within valve cooling equipment rooms. This significantly reduces manpower and time required for pump replacement. By installing an extension frame, the pump can be moved across the cable tray fixed to the side of the valve cooling unit module to the main circulation pump base, enabling non-destructive and non-contact cable tray replacement without elevated work. This avoids the risk of electric shock from live electrical maintenance of valve cooling equipment. Furthermore, the lifting and adjusting mechanism of the slide rail cart allows for pump replacement operations across cable trays of varying heights and widths.

[0063] When the slide rail trolley and the extension frame are separated, the slide rail trolley can enter the narrow maintenance passage between the valve cooling pump body modules. After it is in place, the extension frame is installed, avoiding the problem that the integrated slide rail solution cannot turn or move in the passage.

[0064] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. An online pump changing device for a converter valve cooling system, characterized in that, Includes liftable sliding rail flatbed carts, extension racks, and pallets; The liftable flatbed cart includes a frame body, double-row flatbed cart rails installed along the length of the frame body, and a sliding plate installed on the double-row flatbed cart rails. The width of the sliding plate is greater than the width of the frame body, and the center of the sliding plate is located on the axis of the frame body. The frame body is connected to the width side of the extension frame. The extension frame includes an extension frame body and a double row of extension slide rails mounted on the extension frame body. The double row of extension slide rails are connected to the double row of flatbed slide rails, and the connection end is a wedge-shaped structure. The frame body is connected to a tray along its length, and the height of the tray is within the lifting height range of the liftable rail flatbed.

2. The online pump changing device for the converter valve cooling system according to claim 1, characterized in that, The two ends and sides of the connection between the double-row extended slide rail and the double-row flatbed slide rail are all wedge-shaped structures, and the edges of the wedge-shaped structures are rounded.

3. The online pump changing device for the converter valve cooling system according to claim 1, characterized in that, The frame body is provided with threaded holes, and the slide plate is provided with through holes corresponding to the positions of the threaded holes. The threaded holes and through holes are fixed by end eye bolts.

4. The online pump changing device for the converter valve cooling system according to claim 1, characterized in that, The slide plate is provided with slide plate fixing holes for mounting the pump body, and the tray surface is provided with tray fixing holes for mounting the pump body.

5. The online pump changing device for the converter valve cooling system according to claim 1, characterized in that, It also includes armrests and casters; The handrail is installed on the side of the frame body away from the extension frame, and the casters are installed at the bottom of the frame body.

6. The online pump changing device for the converter valve cooling system according to claim 1, characterized in that, It also includes a lifting pedal and adjustable support feet for the extension rack; The lifting pedal is installed on the side of the frame body away from the extension frame, and the lifting pedal is driven to lift the liftable slide rail flatbed car through a lifting hydraulic power device; the adjustable support feet of the extension frame are installed at the bottom of the extension frame body.

7. The online pump changing device for the converter valve cooling system according to claim 1, characterized in that, The frame body is provided with a pin hole, and the extension frame body is provided with a pin that mates with the pin hole.

8. The online pump changing device for the converter valve cooling system according to claim 1, characterized in that, The pallet's frame has a cross-shaped structure along its length and a square structure along its width.

9. The online pump changing device for the converter valve cooling system according to claim 1, characterized in that, The maximum lifting height of the liftable slide rail flatbed is greater than the sum of the heights of the valve cooling body base and the main circulation pump base.

10. A pump changing method for an online pump changing device in a converter valve cooling system, characterized in that, include: Place the liftable sliding rail flatbed trolley on the side of the pump body to be disassembled, with the sliding plate parallel to the bottom of the pump body to be disassembled; Connect the extension frame to the liftable slide rail flatbed trolley by crossing the cable tray box, and slide the slide plate onto the extension frame to dock with the pump body base to be disassembled; Move the pump body to be disassembled onto the slide plate and secure it. Slide the slide plate back onto the frame body and remove the extension frame. Move the liftable slide rail flatbed to the work area, connect the pallet to the liftable slide rail flatbed, with the bottom of the slide plate close to the surface of the pallet, move the pump body to be disassembled onto the pallet and fix it, move the pallet to the spare pump room, and complete the disassembly of the pump body to be disassembled. Install the pump to be installed onto the base of the pump body to be disassembled. The installation process of the pump body to be installed is a reverse disassembly process, and the installation of the pump body to be installed is completed.

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