Dismounting device for overheating and reheating blocking valve of power station boiler

Abstract

The utility model relates to the technical field of dismounting devices, in particular to a power station boiler overheating and reheating blocking valve dismounting device which comprises a main valve end cover, a valve body, a top plate and four bolts, the main valve end cover is installed in the valve body, four threaded holes are evenly distributed in the main valve end cover in an annular mode, four through holes are formed in the top plate, and each bolt comprises a bolt head and a screw rod. The diameter of the through hole is larger than that of the screw and smaller than that of the bolt head; the top plate abuts against the top of the valve body, and a bolt penetrates through the through hole to be connected with a threaded hole in the main valve end cover. By arranging the top plate and the bolt, the bolt can be screwed to gradually pull the main valve end cover, so that the main valve end cover is separated from the valve body, and the problem that the main valve cover is deflected, clamped and cannot be pulled out due to the fact that the main valve cover is prone to uneven stress is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of disassembly devices, in particular to a disassembly device for superheater reheater block valves of power station boilers. Background Art

[0002] The patent with application number 202321089572.2 discloses a disassembly and assembly device for superheater block valves of power station boilers, which includes a device base, multiple groups of limiting components, a long support plate, a chain block, and a lifting ring; when disassembling the block valve, a portal frame fixed on the valve body is assembled using the device base, multiple groups of limiting components, and the long support plate; then the chain block is hung on the portal frame, and the lifting ring is installed on the main valve cover; then the chain block is connected to the lifting ring, and finally the main valve cover is pulled upward using the chain block; however, the problem with this device is that the friction between the main valve cover and the valve body is large, and when pulling the main valve cover upward, it is prone to uneven force, resulting in the main valve cover being skewed and stuck, which may cause the main valve cover to not be able to be pulled out even if the lifting ring is broken or the wire is disengaged. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a disassembly device for superheater reheater block valves of power station boilers to solve the problem that the main valve cover of the superheater reheater block valve of the power station boiler in the above-mentioned prior art cannot be pulled out.

[0004] To achieve the above purpose, the utility model provides a disassembly device for superheater reheater block valves of power station boilers, which includes a main valve end cover and a valve body. The main valve end cover is installed in the valve body, and 4 threaded holes are evenly distributed in a ring shape on the main valve end cover. It also includes a top plate and 4 bolts. There are 4 through holes on the top plate. The bolt includes a bolt head and a screw rod. The diameter of the through hole is larger than the diameter of the screw rod and smaller than the outer diameter of the bolt head; the top plate abuts against the top of the valve body, and the bolt passes through the through hole and is connected to the threaded hole on the main valve end cover.

[0005] Further, it also includes a chain block, and a lifting ring for connecting with the chain block is fixedly connected to the top of the top plate.

[0006] Further, it also includes a portal frame for hanging the chain block and a fixing device for fixing the portal frame and the valve body.

[0007] Further, the fixing device includes a fixing ring sleeved on the outer side of the valve body. A plurality of locking rods are threadedly connected to the fixing ring. A locking block is fixedly connected to one end of the locking rod close to the valve body; the portal frame is fixedly connected to the top of the fixing ring.

[0008] By setting the top plate and bolts, the utility model can gradually pull the main valve end cover by screwing the bolts, so that the main valve end cover is separated from the valve body, avoiding the problem that the main valve cover is prone to uneven force and being skewed and stuck and unable to be pulled out.

[0009] The utility model facilitates lifting out the main valve cover separated from the valve body by arranging a lifting ring and a chain block; by arranging a gantry frame and a fixing device, a fixed hanging point can be provided for the chain block. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The attached drawings forming a part of this application are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model.

[0011] Figure 1 It is a schematic structural diagram of an embodiment;

[0012] Figure 2 It is a schematic structural diagram of a through hole and a screw rod in the embodiment;

[0013] Figure 3 It is a schematic structural diagram of the fixing device in the embodiment.

[0014] In the figure: 1, main valve end cover; 2, valve body; 3, top plate; 301, through hole; 4, bolt; 401, bolt head; 402, screw rod; 5, lifting ring; 6, chain block; 7, gantry frame; 8, fixing device; 801, fixing ring; 802, locking rod; 803, locking block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the attached drawings and combine with the embodiments to detail the utility model.

[0016] As Figures 1 to 3 shown, according to an embodiment of the utility model, a disassembly device for an overheat and reheating block valve of a power station boiler is provided, including a main valve end cover 1 and a valve body 2. The main valve end cover 1 is installed in the valve body 2. Four threaded holes are evenly distributed in a ring shape on the main valve end cover 1. It further includes a top plate 3 and four bolts 4. Four through holes 301 are provided on the top plate 3. The bolt 4 includes a bolt head 401 and a screw rod 402. The diameter of the through hole 301 is larger than the diameter of the screw rod 402 and smaller than the outer diameter of the bolt head 401. The top plate 3 abuts against the top of the valve body 2, and the bolt 4 passes through the through hole 301 and is connected to the threaded hole on the main valve end cover 1.

[0017] The functions of the top plate 3 and the bolt 4 are to separate the main valve end cover 1 from the valve body 2. The specific steps are as follows:

[0018] Step 1: Abut the top plate 3 against the top of the valve body 2. The four bolts 4 pass through the through holes 301 and are connected to the threaded holes on the main valve end cover 1. Tighten the bolts 4 so that the bolt heads 401 are in contact with the top plate 3;

[0019] Step 2: Two persons simultaneously turn two diagonal bolts 4 in the direction of tightening the bolts 4, and each of the two bolts 4 is turned 0.25 turns. Since the bolts 4 are blocked by the top plate 3 and cannot move, during the process of turning the bolts 4, the main valve end cover 1 is pulled upward by the bolts 4;

[0020] Step 3: Two persons simultaneously turn the other two bolts 4 in the direction of tightening the bolts 4, and each of the two bolts 4 is turned 0.25 turns. Since the bolts 4 are blocked by the top plate 3 and cannot move, during the process of turning the bolts 4, the main valve end cover 1 is pulled upward by the bolts 4;

[0021] Repeat the operations of Step 2 and Step 3 until the main valve end cover 1 is separated from the valve body 2.

[0022] The above method for separating the main valve end cover 1 from the valve body 2 can slowly pull out the main valve end cover 1 step by step, and by controlling the number of turns of the bolts 4 each time, it is avoided that the main valve end cover 1 has a large deflection, so that the main valve end cover 1 can be smoothly separated from the valve body 2.

[0023] In one specific embodiment, it further includes a chain block 6, and a lifting ring 5 for connecting with the chain block 6 is fixedly connected to the top of the top plate 3; by providing the lifting ring 5 and the chain block 6, it is convenient to lift out the main valve end cover 1 after being separated from the valve body 2.

[0024] In one specific embodiment, it further includes a portal frame 7 for hanging the chain block 6 and a fixing device 8 for fixing the portal frame 7 and the valve body 2.

[0025] The fixing device 8 includes a fixing ring 801 sleeved outside the valve body 2, and the portal frame 7 is fixedly connected to the top of the fixing ring 801; a plurality of locking rods 802 are threadedly connected to the fixing ring 801, and a locking block 803 is fixedly connected to one end of the locking rod 802 close to the valve body 2; tightening the locking rod 802 can lock and fix the locking block 803 and the valve body 2; the fixing device 8 can lock the portal frame 7 and the valve body 2, and can provide a fixed hanging point for the chain block 6.

[0026] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A disassembly device for an overheating and reheating block valve of a power station boiler, comprising a main valve end cover (1) and a valve body (2), wherein the main valve end cover (1) is installed inside the valve body (2), and 4 threaded holes are evenly distributed in a ring shape on the main valve end cover (1), and it is characterized in that, It further includes a top plate (3) and four bolts (4). Four through holes (301) are provided on the top plate (3). The bolt (4) includes a bolt head (401) and a screw rod (402). The diameter of the through hole (301) is larger than the diameter of the screw rod (402) and smaller than the outer diameter of the bolt head (401). The top plate (3) abuts against the top of the valve body (2), and the bolt (4) passes through the through hole (301) and is connected to the threaded hole on the main valve end cover (1).

2. The disassembly device for the superheater reheater block valve of a power station boiler according to claim 1, characterized in that It further includes a chain block (6). A lifting ring (5) for connecting with the chain block (6) is fixedly connected to the top of the top plate (3).

3. The disassembly device for the superheater and reheater block valves of a power station boiler according to claim 1, wherein, It further includes a portal frame (7) for hanging the chain block (6) and a fixing device (8) for fixing the portal frame (7) and the valve body (2).

4. The disassembly device for the superheater and reheater block valves of a power station boiler according to claim 3, wherein, The fixing device (8) includes a fixing ring (801) sleeved outside the valve body (2). A plurality of locking rods (802) are threadedly connected to the fixing ring (801). A locking block (803) is fixedly connected to one end of the locking rod (802) close to the valve body (2). The portal frame (7) is fixedly connected to the top of the fixing ring (801).

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