Stopping-block-free type water pressure tool for waste heat boiler tube panel

Abstract

The invention relates to a check-block-free water pressure tool for a waste heat boiler tube panel, and belongs to the technical field of boiler equipment. The device comprises a plug, a water pressure baffle and a header baffle connected with the water pressure baffle through a connecting screw rod, the header baffle is installed on the side, opposite to a large pipe, of a header and comprises a pair of comb-shaped plates and a pair of pulling plates arranged in a crossed mode, and the comb-shaped plates on the two sides are connected through the pulling plates and form a detachable plate-shaped rigid whole. The header baffle, the connecting screw and the water pressure baffle form a frame surrounding the header and the large pipe, and the water pressure baffle is locked and fixed to a pipe opening of the large pipe by screwing down a locking nut on the connecting screw. The header baffle connected with the water pressure baffle through the connecting screw rod is arranged on the side, opposite to the large pipe, of the header, the header is used as a stress support, the water pressure baffle can be stably locked on the pipe opening of the large pipe by screwing the locking nut on the connecting screw rod, and the supporting structure is reasonable and effective.

Description

Technical Field

[0001] The present invention relates to a hydraulic tooling, and in particular to a hydraulic tooling without a stop block for the tube screen of a waste heat boiler, belonging to the technical field of boiler equipment. Background Art

[0002] When the tube screen of the heating surface is subjected to a hydraulic test in the production workshop, the nozzle of the large-diameter pipe joint on the header needs to be blocked by a special hydraulic tooling. The traditional hydraulic tooling used to block the large pipe nozzle on the header is as shown in the appendix Figure 1 This tooling consists of a hydraulic baffle 2 for sealing the nozzle of the large pipe 9, a flange 901 sleeved on the large pipe 9, and several connecting screws 4. When the tooling is fixed to the nozzle of the large pipe 9, several hydraulic stop blocks 902 for preventing the flange from moving need to be arranged on the outer wall of the large pipe 9. Taking the hydraulic stop blocks 902 as the force-bearing support points, the hydraulic baffle 2 is locked on the nozzle of the large pipe 9 by tightening the connecting screws 4. The support structure of the above-mentioned hydraulic tooling is not very reasonable and has the following disadvantages: 1. Since the hydraulic stop blocks 902 need to bear a large force during the hydraulic test as the support points, the hydraulic stop blocks 902 are fixed to the large pipe 9 by welding. After the hydraulic test, the hydraulic stop blocks 902 still remain on the large pipe 9. When the tube screen of the heating surface is installed on site, the hydraulic stop blocks 02 will affect the flaw detection of the connecting weld of the nozzle of the large pipe 9; 2. The design, processing, and installation of the hydraulic stop blocks 902 require a certain amount of manpower and material resources, increasing the production cost of the enterprise; 3. The hydraulic stop blocks 902 remaining on the large pipe 9 also affect the appearance of the tube screen heating surface product. Summary of the Invention

[0003] The present invention mainly solves the technical problem that the existing technology affects the flaw detection and product production cost due to the unreasonable support structure of the tooling, and provides a hydraulic tooling without a stop block for the tube screen of a waste heat boiler with a reasonable support structure.

[0004] The present invention mainly solves the above technical problems through the following technical solutions: The present invention includes a plug matching the inner diameter of the large pipe, a hydraulic baffle covering the nozzle of the large pipe, and the plug is connected to the hydraulic baffle through a screw. The characteristic is that it also includes a header baffle connected to the hydraulic baffle through several connecting screws. The header baffle is arranged on the side of the header opposite to the large pipe. The header baffle, the connecting screws, and the hydraulic baffle form a frame surrounding the header and the large pipe. By tightening the locking nuts on the connecting bolts, the hydraulic baffle is locked and fixed on the nozzle of the large pipe; The header baffle includes a pair of comb-shaped plates arranged opposite to each other on both sides of the water wall tube row, a pair of pull plates cross-arranged on the side of the comb-shaped plates away from the header. The comb-shaped plates on both sides are connected by the pull plates and form a plate-shaped rigid whole. The comb-shaped plates and the pull plates are detachably connected.

[0005] Preferably, the end face of the comb-shaped plate facing the header has an arc-shaped contact surface that fits against the outer wall of the header, and tooth plates arranged at intervals along the arc-shaped contact surface. The tooth plates protrude into the spaces between the water-cooled wall tubes. A connection hole for a connection screw to pass through is provided at the distal end of the comb-shaped plate opposite to the arc-shaped contact surface.

[0006] Preferably, a slot is provided in the middle of the pull plate. The two pull plates are cross-connected through the slots to form a plug connection. The pull plate obliquely passes through the spaces between the water-cooled wall tubes and is detachably connected to the comb-shaped plate through the connection screw in the connection hole.

[0007] Preferably, the plug includes an inner nut, an end cap, and a rubber sealing ring that are sequentially sleeved on the screw. By tightening the screw, the rubber sealing ring abuts against the water pressure baffle.

[0008] Preferably, a turning handle is provided at the outer end of the screw.

[0009] Preferably, the water pressure baffle includes a rubber sealing block and a pressing plate. The pressing plate covers the large pipe nozzle through the rubber sealing block and is connected to the comb-shaped plate through the connection screw. By tightening the screw, the rubber sealing ring abuts against the rubber sealing block.

[0010] The structure of the present invention is simple and has the following advantages: In the present invention, a header baffle connected to the water pressure baffle through a connection screw is provided on the side of the header opposite to the large pipe to replace the flange and the block in the prior art. Using the header as a force-bearing support, by tightening the locking nut on the connection bolt, the water pressure baffle can be stably locked on the large pipe nozzle, and the support structure is reasonable and effective; the header baffle is jointly composed of a pair of comb-shaped plates arranged oppositely and a pair of pull plates arranged crosswise to form a plate-shaped rigid whole, which can ensure the structural stability of the whole tooling during the hydrostatic test. The comb-shaped plate and the pull plate are detachably connected, which facilitates the installation and disassembly of the header baffle; Since there is no need to use a block in the present invention, the defects in the prior art that the block affects flaw detection and the production cost of products increases are overcome.

[0011] Furthermore, the comb-shaped plate contacts the outer wall of the header through the arc-shaped contact surface, which can disperse the acting force between the comb-shaped plate and the header and improve the force-bearing structure between the two. The tooth plates protruding into the spaces between the water-cooled wall tubes can increase the contact surface between the comb-shaped plate and the header, further improving the force-bearing between the comb-shaped plate and the header.

[0012] Furthermore, the pull plate crosses through the spaces between the water-cooled wall tubes to not only realize the connection of the two side comb-shaped plates, but also increase the connection strength and stiffness between the two.

[0013] Further, the plug includes an inner nut, an end cap, and a rubber sealing ring that are sequentially sleeved on the screw rod. By turning the screw rod, the rubber sealing ring and the water pressure baffle form an effective sealing structure at the large pipe nozzle. Further, the water pressure baffle is provided with a rubber sealing block, which can further enhance the sealing performance of the nozzle sealing structure.

[0014] Therefore, the present invention solves the technical problems existing in the prior art and has the advantages of being applicable to the plugging and sealing of large pipes with different calibers, and being convenient for installation and disassembly. Brief Description of the Drawings

[0015] Appendix Figure 1 is a schematic diagram of the prior art.

[0016] Appendix Figure 2 is an assembly schematic diagram of a preferred embodiment of the present invention.

[0017] Appendix Figure 3 is a schematic diagram of the header baffle in a preferred embodiment of the present invention.

[0018] Appendix Figure 4 is a schematic diagram of the comb-shaped plate in a preferred embodiment of the present invention.

[0019] Appendix Figure 5 is a three-dimensional schematic diagram of the comb-shaped plate in a preferred embodiment of the present invention.

[0020] Appendix Figure 6 is a partial sectional schematic diagram of a preferred embodiment of the present invention.

[0021] Appendix Figure 7 is a schematic diagram of the pull plate in a preferred embodiment of the present invention.

[0022] Description of the Reference Numerals: 1. Header baffle; 11. Comb-shaped plate; 111. Arc contact surface; 112. Tooth plate; 113. Connection hole; 12. Pull plate; 121. Slot; 2. Water pressure baffle; 21. Rubber sealing block; 22. Pressing plate; 3. Plug; 31. Inner nut; 32. End cap; 33. Rubber sealing ring; 4. Connecting screw rod; 5. Positioning link; 6. Screw rod; 61. Turning handle; 7. Water wall tube bank; 8. Header; 9. Large pipe; 901. Flange; 902. Water pressure block. Detailed Embodiments

[0023] The following is a further specific description of the technical solution of the present invention through examples and in conjunction with the drawings.

[0024] Example 1: As shown in Appendix Figure 1As shown in the figure, the present invention includes a header baffle 1 installed on one side of the header 8 opposite to the large pipe 9, a hydraulic pressure baffle 2 covering the pipe orifice of the large pipe 9, a plug 3 matching the inner diameter of the large pipe, the plug 3 is connected to the hydraulic pressure baffle 2 through a screw rod 6, and the header baffle 1 is connected to the hydraulic pressure baffle 2 through connecting screw rods 4 distributed at the four corners. The header baffle 1, the connecting screw rods 4, and the hydraulic pressure baffle 2 form a square frame surrounding the header 8 and the large pipe 9. By tightening the locking nuts on the connecting bolts 4, the hydraulic pressure baffle 2 is locked and fixed at the pipe orifice of the large pipe 9; The header baffle 1 includes a pair of comb-shaped plates 11 arranged opposite to each other on both sides of the water wall tube bank 7, and a pair of pull plates 12 arranged crosswise on the side of the comb-shaped plates 11 away from the header 8. The comb-shaped plates 11 on both sides are connected through the pull plates 12 and form a plate-shaped rigid whole; The end face of the comb-shaped plate 11 facing the header 8 has an arc-shaped contact surface 111 that fits the outer wall of the header 8 and tooth plates 112 arranged at intervals along the arc-shaped contact surface 111. The tooth plates 112 protrude into the inter-tube gaps of the water wall tube bank 7. A connection hole 113 for the connecting screw rod 4 to pass through is provided at the distal end of the comb-shaped plate 11 opposite to the arc-shaped contact surface 111; The middle of the pull plate 12 is provided with a slot 121. The two pull plates 12 are cross-connected through the slot 121 to form an insertion connection. The pull plates 12 obliquely pass through the inter-tube gaps of the water wall tube bank 7 and are detachably connected to the comb-shaped plates 11 through the connecting screw rods 4 at the connection holes 113; The hydraulic pressure baffle 2 includes a rubber sealing block 21 and a pressing plate 22. The pressing plate 22 covers the pipe orifice of the large pipe 9 through the rubber sealing block 21 and is connected to the comb-shaped plate through the connecting screw rod 4; The plug 3 includes an inner nut 31, an end cap 32, and a rubber sealing ring 33 that are sequentially sleeved on the screw rod 6. By tightening the screw rod 6, the rubber sealing ring 33 plugs the pipe orifice of the large pipe 9 and abuts against the rubber sealing block 21; A turning handle 61 is provided at the outer end of the screw rod 6.

[0025] Of course, the above-mentioned drawings and embodiments are only for explaining and illustrating the present invention and cannot be used as an improper limitation of the present invention. All technical solutions obtained by those skilled in the art based on the present invention through equivalent adjustments and changes fall within the protection scope of the present invention.

Claims

1. A water pressure tooling for a waste heat boiler tube panel without a stop block, comprising a plug (3) matching the inner diameter of a large tube (9), a water pressure baffle plate (2) covering the nozzle of the large tube (9), and the plug (3) is connected to the water pressure baffle plate (2) through a screw rod (6), characterized in that, It further includes a header baffle (1) connected to the water pressure baffle (2) through a plurality of connecting screws (4). The header baffle (1) is arranged on the side of the header (8) opposite to the large pipe (9). The header baffle (1), the connecting screws (4), and the water pressure baffle (2) form a frame surrounding the header (8) and the large pipe (9). By tightening the lock nuts on the connecting bolts (4), the water pressure baffle (2) is locked and fixed at the nozzle of the large pipe (9). The header baffle (1) includes a pair of comb-shaped plates (11) arranged opposite to each other on both sides of the water wall tube bank (7), and a pair of pull plates (12) cross-arranged on the side of the comb-shaped plates (11) away from the header (8). The comb-shaped plates (11) on both sides are connected through the pull plates (12) to form a plate-shaped rigid whole, and the comb-shaped plates (11) and the pull plates (12) are detachably connected.

2. The water pressure tooling without a stop block for the tube screen of a waste heat boiler according to claim 1, characterized in that, The end face of the comb-shaped plate (11) facing the header (8) has an arc-shaped contact surface (111) fitting the outer wall of the header (8) and tooth plates (112) arranged at intervals along the arc-shaped contact surface (111). The tooth plates (112) protrude into the inter-tube gaps of the water wall tube bank (7). A connection hole (113) for the connecting screw (4) to pass through is opened at the distal end of the comb-shaped plate (11) opposite to the arc-shaped contact surface (111).

3. The water pressure tooling without a baffle for the tube screen of a waste heat boiler according to claim 2, characterized in that, A slot (121) is opened in the middle of the pull plate (12). The two pull plates (12) cross each other and are inserted through the slot (121). The pull plates (12) obliquely pass through the inter-tube gaps of the water wall tube bank (7) and are detachably connected to the comb-shaped plate (11) through the connecting screw (4) at the connection hole (113).

4. A water pressure tooling for a waste heat boiler tube screen without a stop block according to claim 1 or 2 or 3, characterized in that The plug (3) includes an inner nut (31), an end cap (32), and a rubber sealing ring (33) sequentially sleeved on the screw (6). By tightening the screw (6), the rubber sealing ring (33) abuts against the water pressure baffle (2).

5. A no-block water pressure tooling for the tube screen of a waste heat boiler according to claim 1 or 2 or 3, characterized in that A turning handle (61) is arranged at the outer end of the screw (6).

6. According to the non-block type water pressure tooling for the tube screen of a waste heat boiler described in claim 4, the water pressure baffle (2) includes a rubber sealing block (21) and a pressing plate (22). The pressing plate (22) covers the nozzle of the large pipe (9) through the rubber sealing block (21) and is connected to the comb-shaped plate (11) through the connecting screw (4). By tightening the screw (6), the rubber sealing ring (33) abuts against the rubber sealing block (21).

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