Integral pressing tool for tuyere large sleeve

Abstract

The utility model belongs to the field of mechanical manufacturing process, and particularly relates to a tuyere large sleeve integral pressing tool which comprises an upper mould plate, a middle mould pressing plate and a lower mould plate, the upper mould plate is matched with a flange face of a tuyere large sleeve, and a mounting hole is formed in the upper mould 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 beneficial effects of the utility model are that the tuyere large sleeve can be independently subjected to a sealing experiment, the sealing problem can be handled in time when found, the workload of on-site installation, test and disassembly can be reduced, and the technical requirements of customers on the sealing performance of the tuyere large sleeve can be met.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical manufacturing technology, and particularly relates to an integral pressure testing tool for tuyere large sleeves. Background Art

[0002] There are 34 tuyere large sleeves used in the blast furnace body of a certain company. After the large sleeves are manufactured, they are shipped to the site for commissioning and installation (the 34 tuyere large sleeves are respectively bolted to the tuyere flanges reserved on the blast furnace body). See Figure 2 、 Figure 3 。The single tuyere large sleeve is of a multi-angle cylindrical structure, externally connected to the tuyere flange (the tuyere flange has been installed on the blast furnace body), and internally connected to the tuyere two-piece. Both the inside and outside are formed by casting and machining. Due to the site being in a subtropical marine monsoon climate and being used on the blast furnace, to prevent leakage of relevant gases, the sealing performance of the large sleeve body is required to be very high, reaching a working pressure of 0.4 - 0.6 Mpa.

[0003] This tuyere large sleeve is a multi-angle special-shaped cylindrical casting. To ensure its overall sealing performance, an overall sealing test needs to be carried out on it. The test pressure is 0.5 Mpa, and it is qualified if there is no leakage after maintaining the pressure for 10 minutes. Due to its special structure, in actual installation, the tuyere large sleeve is generally not separately subjected to a sealing test, but is jointly subjected to a sealing test after being combined with the tuyere two-piece. Its disadvantages are: on the one hand, it requires high-level staff to participate in the process monitoring, and on the other hand, it increases the process workload. After leakage occurs, it needs to be disassembled and returned for repair, which will inevitably affect the overall installation progress. Content of the Utility Model

[0004] The purpose of the utility model is to provide an integral pressure testing tool for tuyere large sleeves, overcome the deficiencies of the prior art, realize the separate sealing test of the tuyere large sleeve, be able to promptly handle problems found, reduce the workload of on-site installation disassembly, improve the pressure testing efficiency and accuracy, ensure the sealing performance of the tuyere large sleeve, and meet the technical requirements of the customer for the sealing performance of the tuyere large sleeve.

[0005] To achieve the above purpose, the utility model is realized through the following technical solutions:

[0006] An integral pressure testing tool for tuyere large sleeves, 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 large sleeve. Installation holes are provided on the upper platen and are connected to the flange holes on the flange surface through bolts. The lower platen matches the bottom surface of the tuyere large sleeve. Sealing grooves are provided on the corresponding mating surfaces of the upper platen and the lower platen, and O-rings are provided in the sealing grooves. The middle platen press plate cooperates with the inner bottom positioning platform, and the middle platen press plate is connected to the lower platen through bolts. Four gaps are evenly provided around the middle platen press plate, and the size of the gaps is larger than the cross-sectional size of the inner square seat in the tuyere large sleeve.

[0007] Furthermore, the specifications of the O-ring are as follows:

[0008] Furthermore, the thickness of the upper tire plate, the middle tire pressure plate, and the lower tire plate is 30-40mm.

[0009] Furthermore, the upper tire plate is equipped with a pressure gauge, an intake valve, and a pressure relief valve, with the intake valve connected to the pressurization equipment pipeline.

[0010] Furthermore, the threaded hole on the lower tire plate that connects to the intermediate tire pressure plate is a blind hole.

[0011] Furthermore, the cross-sectional dimensions of the sealing groove are 12.4 mm wide and 7.6 mm deep.

[0012] Furthermore, the distance between the inner positioning platform on the bottom surface and the bottom surface is 110mm.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1) It can perform a sealing test on the large air vent sleeve separately, and can deal with sealing problems in a timely manner, reducing the workload of on-site installation, testing, disassembly, and return transportation;

[0015] 2) It can improve the efficiency and accuracy of pressure testing, ensure the sealing performance of the air outlet sleeve, meet the customer's technical requirements for the sealing performance of the air outlet sleeve, improve production efficiency, reduce the labor intensity of workers, reduce dependence on highly skilled workers, and reduce production costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the pressurization state in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of a single-unit air vent large-scale structure in existing technology;

[0018] Figure 3 yes Figure 2 Sectional view along line AA;

[0019] Figure 4 This is a schematic diagram of the upper tire plate structure in an embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram of the lower tire plate structure in an embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of the tire pressure plate structure in an embodiment of this utility model;

[0022] In the diagram: 1-Upper tire plate, 2-Middle tire pressure plate, 3-Lower tire plate, 4-Air vent sleeve, 5-Flange face, 6-Bottom face, 7-O-ring, 8-Positioning platform, 9-Notch, 10-Pressure gauge, 11-Inlet valve, 12-Pressure relief valve, 13-Pressure pressing equipment, 14-Square seat. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0025] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous 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 claimed invention, but merely to illustrate selected embodiments of the invention.

[0026] See Figure 1-6 This is a schematic diagram of an embodiment of the pressure testing fixture for a large air vent sleeve according to this utility model. It includes an upper jig plate 1, a middle jig plate 2, and a lower jig plate 3. The upper jig plate 1 matches the flange face 5 of the large air vent sleeve 4. The upper jig plate 1 has mounting holes that connect to the flange holes on the flange face 5 via bolts. The lower jig plate 3 matches the bottom surface 6 of the large air vent sleeve 4. Sealing grooves are provided on the corresponding mating surfaces of the upper jig plate 1 and the lower jig plate 3, and O-rings 7 are installed in the sealing grooves. The middle jig plate 2 mates with the inner positioning platform 8 of the bottom surface 6. The distance between the inner positioning platform 8 and the bottom surface 6 is 110mm. The middle jig plate 2 is connected to the lower jig plate 3 via bolts. Four notches 9 are evenly provided around the perimeter of the middle jig plate 2. The size of the notches 9 is larger than the cross-sectional size of the inner square seat 14 of the large air vent sleeve 4. The upper jig plate 1 is equipped with a pressure gauge 10, an inlet valve 11, and a pressure relief valve 12. The inlet valve 11 is connected to the pipeline of the pressure testing equipment 13.

[0027] The upper tire plate 1, the middle tire pressure plate 2, and the lower tire plate 3 are made of three round steel plates. Each of the upper tire plate 1 and the lower tire plate 3 has a sealing groove machined for installing O-rings. Two 40mm thick diameter steel plates are selected. Steel plates are used as the upper and lower tire plates. 30mm thick, diameter... The steel plate is used as the pressure plate for the intermediate tire. Six equal sections are machined on the upper tire plate 1. The center distance of the aperture is consistent with the center distance of the flange hole of the large air outlet sleeve 4.

[0028] Diameter of the intermediate tire pressure plate 2 Process four Smooth holes. To improve sealing performance, the threaded holes on the lower tire plate 3 that connect to the intermediate tire pressure plate 2 are blind holes. Four M30 blind holes are machined on the lower tire plate (the center distance between the smooth holes on the intermediate tire pressure plate 2 is the same as the center distance between the four blind holes on the lower tire plate 3). Four notches 9 are machined on the outer circle of the intermediate tire pressure plate 2 to avoid the four square seats 14 inside the large air vent sleeve 4 during installation. It is lowered to the bottom positioning platform 8 and engaged with the lower tire plate 3.

[0029] The specifications of O-ring 7 are as follows: The sealing groove has a cross-sectional dimension of 12.4mm wide and 7.6mm deep, and preferably uses an O-ring of specification 7. To protect the sealing strength, the thickness of the upper tire plate 1, the middle tire pressure plate 2, and the lower tire plate 3 is 30-40mm.

[0030] The specific operating steps of this utility model embodiment are as follows: 1) Place the bottom surface 6 of the large air outlet sleeve 4 face down on the lower tire plate 3, and place the lower tire plate 3 on the operating platform; 2) Insert the intermediate tire pressure plate 2 from the flange side of the large air outlet sleeve 4, rotate the intermediate tire pressure plate 2 so that the notch 9 on it corresponds to the corresponding square seat, and fall onto the positioning platform 8 through the square seat. Connect the intermediate tire pressure plate 2 and the lower tire plate 3 with bolts so that the lower tire plate 3 and the bottom surface 6 are sealed; 3) Connect the upper tire plate 1 to the flange surface 5 of the large air outlet sleeve 4. The upper tire plate 1 and the flange surface 5 are sealed, and a closed cavity is formed inside the large air outlet sleeve 4; 4) Install the air pressure gauge 10, the air inlet valve 11 and the pressure relief valve 12 on the upper tire plate 1. The air inlet valve 11 is connected to the pipeline of the pressure testing equipment 13; 5) Fill the large air outlet sleeve 4 with compressed air through the air inlet valve 11, maintain the test pressure at 0.5 MPa, and hold the pressure for 10 minutes without leakage to be considered qualified. If the test pressure cannot be maintained within 10 minutes, it indicates that there is a leak. Check the surface of the casting of the large sleeve 4 of the air outlet, the connection of the sealing rings of the upper jig 1 and the lower jig 3 for defects, and deal with them accordingly until the test is qualified.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-scale integrated pressure testing fixture for air vents, characterized in that, The system includes an upper tire plate, a middle tire pressure plate, and a lower tire plate. The upper tire plate matches the flange face of the vent sleeve and has mounting holes that are bolted to the flange holes on the flange face. The lower tire plate matches the bottom surface of the vent sleeve. Sealing grooves are provided on the corresponding mating surfaces of the upper and lower tire plates, and O-rings are provided in the sealing grooves. The middle tire pressure plate mates with the positioning platform on the inner side of the bottom surface and is bolted to the lower tire plate. The middle tire pressure plate has four notches evenly distributed around its perimeter, and the size of the notches is larger than the cross-sectional size of the square seat inside the vent sleeve.

2. The integral pressure testing fixture for a large air vent as described in claim 1, characterized in that, The O-ring has a specification of φ10-12mm.

3. The integral pressure testing fixture for a large air vent as described in claim 1, characterized in that, The thickness of the upper tire plate, the middle tire pressure plate, and the lower tire plate is 30-40mm.

4. The integral pressure testing fixture for a large air vent as described in claim 1, characterized in that, The upper tire plate is equipped with a pressure gauge, an air intake valve, and a pressure relief valve. The air intake valve is connected to the pressurization equipment pipeline.

5. The integral pressure testing fixture for a large air vent as described in claim 1, characterized in that, The threaded hole on the lower tire plate that connects to the middle tire pressure plate is a blind hole.

6. The integral pressure testing fixture for a large air vent as described in claim 1, characterized in that, The sealing groove has a cross-sectional dimension of 12.4 mm wide and 7.6 mm deep.

7. The integral pressure testing fixture for a large air vent as described in claim 1, characterized in that, The distance between the inner positioning platform and the bottom surface is 110mm.

Images