Tuyere large sleeve integral pressing tool and operation method thereof

Abstract

The invention belongs to the field of mechanical manufacturing processes, and particularly relates to a tuyere large sleeve integral pressing tool and an operation method thereof.The tuyere large sleeve integral pressing tool comprises an upper mold plate, a middle mold pressing plate and a lower mold plate, the upper mold plate is matched with a flange face of a tuyere large sleeve, and a mounting hole is formed in the upper mold plate and connected with a flange hole in the flange face through a bolt; the lower bed mould is matched with the bottom surface of the tuyere large sleeve, sealing grooves are formed in the corresponding matching surfaces of the upper bed mould and the lower bed mould, and O-shaped rings are arranged in the sealing grooves; the middle tire pressing plate is matched with the bottom face inner side positioning table, the middle tire pressing plate is connected with the lower tire plate through bolts, four notches are evenly formed in the periphery of the middle tire pressing plate, and the size of the notches is larger than that of the cross section of the tuyere large sleeve inner square base. The device has the beneficial effects that a sealing experiment can be independently carried out on the tuyere large sleeve, the sealing problem can be solved in time when found, the workload of on-site installation, test and disassembly is reduced, and the technical requirements of customers on the sealing performance of the tuyere large sleeve are met.

Description

Technical Field

[0001] The invention belongs to the field of mechanical manufacturing technology, and in particular relates to a large-set integral pressing tool for an air inlet and an operating method thereof. Background Art

[0002] The tuyere sets used in a company's blast furnace are 34 sets. After the sets are completed, they are shipped to the site for commissioning and installation (the 34 sets are respectively fitted with the tuyere flanges on the tuyere reserved on the blast furnace body). Figure 2 、 Figure 3 The single tuyere sleeve is a multi-angle cylindrical structure, connected to the tuyere flange on the outside (the tuyere flange is already installed on the blast furnace body) and connected to the second tuyere sleeve on the inside. Both the inside and outside are cast and machined. Because the site has a subtropical marine monsoon climate and is used in blast furnaces, the sealing requirements of the sleeve body are very high to prevent related gas leakage, and it must reach an operating pressure of 0.4-0.6Mpa.

[0003] The large tuyere sleeve is a multi-angle, special-shaped cylindrical casting. To ensure its overall sealing, it requires a comprehensive sealing test. The test pressure is 0.5 MPa, and the pressure must be maintained for 10 minutes without leakage to qualify. Due to its special structure, in actual installations, the large tuyere sleeve is generally not tested separately. Instead, it is tested together with the second tuyere sleeve. This has the disadvantages of requiring highly skilled staff to participate in process monitoring, increasing the workload, and requiring disassembly and repair if a leak occurs, which inevitably affects the overall installation progress. Summary of the Invention

[0004] The purpose of the present invention is to provide an overall pressing tool for a large air vent sleeve and an operating method thereof, so as to overcome the shortcomings of the existing technology, realize the sealing test of the large air vent sleeve separately, deal with the problems found in time, reduce the workload of on-site installation and disassembly, improve the pressing efficiency and accuracy, ensure the sealing of the large air vent sleeve, and meet the customer's technical requirements for the sealing of the large air vent sleeve.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] One of the technical solutions: A tool for integrally pressing a large air vent sleeve, characterized in that it includes an upper tire plate, a middle tire pressure plate and a lower tire plate, the upper tire plate matches the flange surface of the large air vent sleeve, the upper tire plate is provided with a mounting hole which is connected to the flange hole on the flange surface by bolts, the lower tire plate matches the bottom surface of the large air vent sleeve, the corresponding mating surfaces of the upper tire plate and the lower tire plate are provided with a sealing groove, and an O-ring is provided in the sealing groove; the middle tire pressure plate matches the inner positioning platform of the bottom surface, the middle tire pressure plate is connected to the lower tire plate by bolts, and four notches are evenly arranged around the periphery of the middle tire pressure plate, and the size of the notch is larger than the cross-sectional size of the square seat inside the large air vent sleeve.

[0007] The specification of the O-ring is φ10 - 12mm.

[0008] The thicknesses of the upper platen, the middle platen pressing plate, and the lower platen are 30 - 40mm.

[0009] The upper platen is provided with a pressure gauge, an air inlet valve, and a pressure relief valve, and the air inlet valve is connected to the pipeline of the pressurizing equipment.

[0010] The threaded holes on the lower platen connected to the middle platen pressing plate are blind holes.

[0011] The cross-sectional dimensions of the sealing groove are 12.4mm in width and 7.6mm in depth.

[0012] The distance from the inner positioning platform on the bottom surface to the bottom surface is 110mm.

[0013] Technical solution two: An operation method for the overall pressure test tooling of a tuyere large sleeve, characterized in that the specific operation steps are as follows: 1) Place the bottom surface of the tuyere large sleeve downward on the lower platen; 2) Put the middle platen pressing plate in from the flange side of the tuyere large sleeve, rotate the middle platen pressing plate so that the notch on it corresponds to the corresponding square seat, pass through the square seat, and fall onto the positioning platform, and connect the middle platen pressing plate and the lower platen with bolts to make the lower platen keep sealed with the bottom surface; 3) Connect the upper platen with the flange surface of the tuyere large sleeve, keep the upper platen sealed with the flange surface, and form a sealed cavity inside the tuyere large sleeve; 4) Install a pressure gauge, an air inlet valve, and a pressure relief valve on the upper platen, and connect the air inlet valve to the pipeline of the pressurizing equipment; 5) Fill compressed air into the tuyere large sleeve through the air inlet valve, keep the test pressure at 0.5Mpa, and it is qualified if there is no leakage after maintaining the pressure for 10 minutes.

[0014] When the test pressure cannot be maintained within 10 minutes, it indicates a leakage. Check whether there are defects at the connection of the sealing rings on the surface of the tuyere large sleeve casting, the upper platen, and the lower platen, and make corresponding treatments until the test is qualified.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1) It can realize the separate sealing test of the tuyere large sleeve. When sealing problems are found, they can be processed in time, reducing the workload of on-site installation, testing, disassembly, and return transportation;

[0017] 2) It can improve the pressure test efficiency and accuracy, ensure the sealing performance of the tuyere large sleeve, meet the technical requirements of the customer for the sealing performance of the tuyere large sleeve, improve production efficiency, reduce the labor intensity of the staff, reduce the dependence on high-level staff, and reduce production costs. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the pressure test state of the embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of the structure of a single tuyere large sleeve in the prior art;

[0020] Figure 3 is Figure 2 a sectional view along line A-A in

[0021] Figure 4 is a schematic diagram of the structure of the upper platen in the embodiment of the present invention;

[0022] Figure 5 is a schematic diagram of the structure of the lower platen in the embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of the structure of the middle platen press plate in the embodiment of the present invention;

[0024] In the figure: 1 - upper platen, 2 - middle platen press plate, 3 - lower platen, 4 - tuyere large sleeve, 5 - flange surface, 6 - bottom surface, 7 - O-ring, 8 - positioning table, 9 - notch, 10 - pressure gauge, 11 - intake valve, 12 - pressure relief valve, 13 - pressure testing equipment, 14 - square seat. Detailed implementation manners

[0025] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with specific embodiments. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments.

[0026] In order to more clearly illustrate the specific implementation manners of the present invention or the technical solutions in the prior art, the specific embodiments required for use in the description of the specific implementation manners or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation manners of the present invention. For those of ordinary skill in the art, without creative efforts, other specific embodiments can also be obtained based on these specific embodiments.

[0027] Generally, the components of the embodiments of the present invention described and shown in the specific embodiments here can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the present invention claimed, but merely represents the selected embodiments of the present invention.

[0028] See Figures 1-6, is a schematic structural diagram of an embodiment of an overall pressure test tool for a tuyere jacket of the present invention, including an upper platen 1, a middle platen press plate 2 and a lower platen 3. The upper platen 1 matches the flange surface 5 of the tuyere jacket 4. Installation holes are provided on the upper platen 1 and are connected to the flange holes on the flange surface 5 by bolts. The lower platen 3 matches the bottom surface 6 of the tuyere jacket 4. Sealing grooves are provided on the corresponding mating surfaces of the upper platen 1 and the lower platen 3, and O-rings 7 are provided in the sealing grooves; the middle platen press plate 2 cooperates with the inner positioning platform 8 on the bottom surface 6. The distance from the inner positioning platform 8 on the bottom surface 6 to the bottom surface 6 is 110 mm. The middle platen press plate 2 is connected to the lower platen 3 by bolts. Four notches 9 are evenly provided around the middle platen press plate 2, and the size of the notch 9 is larger than the cross-sectional size of the inner square seat 14 in the tuyere jacket 4. A pressure gauge 10, an air inlet valve 11 and a pressure relief valve 12 are provided on the upper platen 1, and the air inlet valve 11 is connected to the pipeline of the pressure test equipment 13.

[0029] The upper platen 1, the middle platen press plate 2 and the lower platen 3 are made of three circular steel plates. A sealing groove is processed on each of the upper platen 1 and the lower platen 3 for installing an O-ring. Two steel plates with a thickness of 40 mm and a diameter of φ1200 mm are selected as the upper platen and the lower platen. A steel plate with a thickness of 30 mm and a diameter of φ830 mm is used as the middle platen press plate. Six equally spaced φ36 light holes are processed on the upper platen 1, and the center distance is the same as the center distance of the flange holes of the tuyere jacket 4.

[0030] The diameter of the middle platen press plate 2 is φ830 (φA - 10 > φ830 > φB + 10 mm), and four φ36 light holes are processed. In order to improve the sealing performance, the threaded holes on the lower platen 3 connected to the middle platen press plate 2 are blind holes. Four M30 blind holes are processed on the lower platen (the center distance of the light holes on the middle platen press plate 2 is the same as the center distance of the four blind holes on the lower platen 3). Four notches 9 are processed on the outer circle of the middle platen press plate 2, which are used to avoid the four square seats 14 inside the tuyere jacket 4 during installation. When it reaches the bottom, the positioning platform 8 is bolted to the lower platen 3.

[0031] The specification of the O-ring 7 is φ10 - 12 mm. The cross-sectional size of the sealing groove is 12.4 mm wide and 7.6 mm deep. The preferably selected specification of the O-ring 7 is φ10 mm. In order to protect the plugging strength, the thickness of the upper platen 1, the middle platen press plate 2 and the lower platen 3 is 30 - 40 mm.

[0032] An operation method of an integral pressure testing tool for a tuyere jacket of the present invention is as follows: 1) Place the bottom surface 6 of the tuyere jacket 4 facing down on the lower platen 3, and place the lower platen 3 on the operation platform; 2) Insert the middle platen pressing plate 2 from the flange side of the tuyere jacket 4, rotate the middle platen pressing plate 2 so that the notch 9 on it corresponds to the corresponding square seat, pass through the square seat, and fall onto the positioning table 8, and connect the middle platen pressing plate 2 and the lower platen 3 with bolts to keep the lower platen 3 sealed with the bottom surface 6; 3) Connect the upper platen 1 with the flange surface 5 of the tuyere jacket 4, keep the upper platen 1 sealed with the flange surface 5, and form a sealed cavity inside the tuyere jacket 4; 4) Install a pressure gauge 10, an air inlet valve 11 and a pressure relief valve 12 on the upper platen 1, and connect the air inlet valve 11 to the pipeline of the pressure testing device 13; 5) Fill compressed air into the tuyere jacket 4 through the air inlet valve 11, keep the test pressure at 0.5 Mpa, and it is qualified if there is no leakage after maintaining the pressure for 10 minutes. When the test pressure cannot be maintained within 10 minutes, it indicates a leakage. Check whether there are defects at the seal ring connection of the casting surface of the tuyere jacket 4, the upper platen 1 and the lower platen 3, and make corresponding treatments until the test is qualified.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integral pressure testing tool for tuyere jacket, characterized in that It includes an upper platen, a middle platen press plate and a lower platen. The upper platen matches the flange surface of the tuyere water-cooled shell. Mounting holes are provided on the upper platen and are connected to the flange holes on the flange surface by bolts. The lower platen matches the bottom surface of the tuyere water-cooled shell. Sealing grooves are provided on the corresponding mating surfaces of the upper platen and the lower platen, and O-rings are arranged in the sealing grooves. The middle platen press plate cooperates with the inner bottom positioning table, and the middle platen press plate is connected to the lower platen by bolts. Four notches are evenly arranged around the middle platen press plate, and the size of the notches is larger than the cross-sectional size of the inner square seat in the tuyere water-cooled shell.

2. The integral pressure testing tool for tuyere large sleeve according to claim 1, wherein, The specification of the O-ring is φ10-12mm.

3. The integral pressure testing tooling for tuyere jacket according to claim 1, characterized in that, The thicknesses of the upper platen, the middle platen press plate and the lower platen are 30-40mm.

4. The integral pressure testing tooling for tuyere large sleeve according to claim 1, wherein A pressure gauge, an air inlet valve and a pressure relief valve are provided on the upper platen, and the air inlet valve is connected to the pipeline of the pressure boosting equipment.

5. The overall pressure testing tooling for the tuyere large sleeve according to claim 1, characterized in that, The threaded holes on the lower platen connected to the middle platen press plate are blind holes.

6. The overall pressure testing tooling for the tuyere large sleeve according to claim 1, characterized in that, The cross-sectional size of the sealing groove is 12.4mm in width and 7.6mm in depth.

7. The integral pressure testing tooling for tuyere large sleeve according to claim 1, wherein The distance from the inner bottom positioning table to the bottom surface is 110mm.

8. An operation method of an integral pressure testing tool for a tuyere large sleeve, characterized in that, The specific operation steps are as follows: 1) Place the tuyere water-cooled shell with its bottom surface facing down on the lower platen; 2) Insert the middle platen press plate from the flange side of the tuyere water-cooled shell, rotate the middle platen press plate so that the notches on it correspond to the corresponding square seats, pass through the square seats and fall onto the positioning table, and connect the middle platen press plate and the lower platen by bolts to keep the lower platen sealed with the bottom surface; 3) Connect the upper platen to the flange surface of the tuyere water-cooled shell to keep the upper platen sealed with the flange surface, and form a sealed cavity inside the tuyere water-cooled shell; 4) Install a pressure gauge, an air inlet valve and a pressure relief valve on the upper platen, and connect the air inlet valve to the pipeline of the pressure boosting equipment; 5) Fill compressed air into the tuyere water-cooled shell through the air inlet valve, keep the test pressure at 0.5Mpa, and it is qualified if there is no leakage after maintaining the pressure for 10 minutes.

9. The operation method of an integral pressure testing tool for a tuyere jacket according to claim 8, characterized in that, When the test pressure cannot be maintained within 10 minutes, it indicates a leakage. Check whether there are defects on the surface of the tuyere water-cooled shell casting, the sealing ring joints of the upper platen and the lower platen, and make corresponding treatments until the test is qualified.

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