A metallurgical equipment valve chest bellows seal assembly connection device

Abstract

The application discloses a kind of smelting equipment valve box bellows seal assembly connecting device, it is related to mechanical seal connection technical field, solve the technical problem of mechanical connection and sealing requirement caused by the small displacement of up and down movement of the required regulating valve for weighing and the rotating movement of regulating valve shaft.In the connecting device, flange hole plate bolt is installed in hanger hole plate, both ends of bellows are connected by bolt with flange hole plate and valve box shell respectively, sliding bearing cover is connected with flange hole plate by bolt, sliding bearing cover is arranged in flange hole plate and bellows, sliding bearing is installed in the bottom of inner hole of sliding bearing cover, sealing gland bolt is installed in the top of inner hole of sliding bearing cover, sealing assembly is installed in the inner hole of sliding bearing cover, regulating valve shaft is arranged in sealing gland, sealing assembly and sliding bearing. Thus realize the feasibility of on-line maintenance and replacement of vulnerable parts bellows and sealing assembly, easy to realize maintenance, disassembly, enhance sealing effect.

Description

Technical Field

[0001] This invention relates to the field of mechanical seal connection technology, and in particular to a connection device for a bellows sealing assembly of a valve box in a smelting equipment. Background Technology

[0002] In the blast furnace ironmaking process, the top charging equipment is used to charge the furnace and ensure its proper distribution within the furnace, while also providing a seal at the furnace top. The lower valve box of the top charging equipment includes a flow regulating valve and a weighing device. The weighing device involves vertical displacement, which is achieved by moving the flow regulating valve up and down along with the regulating valve hanger. The sealing bellows between the valve box housing and the regulating valve hanger is prone to fatigue failure under alternating lateral and angular displacements; furthermore, the high temperature, high pressure, dusty, and toxic furnace gases can cause corrosion of the sealing bellows, necessitating improvements. Summary of the Invention

[0003] This application provides a bellows sealing assembly connection device for valve box of smelting equipment, which solves the technical problems of mechanical connection and sealing requirements caused by the requirement of small vertical displacement of the regulating valve and the rotational movement of the regulating valve shaft for weighing.

[0004] This application provides a bellows sealing assembly connection device for a valve box of a smelting equipment, including a bellows, a flange orifice plate, a sliding bearing housing, a sliding bearing, a sealing gland, and a sealing assembly. The bellows is installed between the valve box housing and the regulating valve hanger. A weighing device configured on the valve box housing is connected to the regulating valve hanger. The regulating valve hanger includes a hanger orifice plate facing the valve box housing and having holes. The flange orifice plate is bolted to the holes in the hanger orifice plate. The two axial ends of the bellows are respectively bolted to the flange orifice plate and the valve box housing. The sliding bearing housing is bolted to the flange orifice plate and passes through the flange orifice plate and the bellows. The sliding bearing is interference-fitted to the bottom of the inner hole of the sliding bearing housing. The sealing gland is bolted to the top of the inner hole of the sliding bearing housing. The sealing assembly is installed in the inner hole of the sliding bearing housing and is located between the sliding bearing and the sealing gland. The regulating valve shaft of the material flow regulating valve configured on the valve box housing passes through the sealing gland, the sealing assembly, and the sliding bearing.

[0005] Alternatively, the flange orifice plate passes through:

[0006] The first bolt is connected to the hanger hole plate;

[0007] The second bolt connects to the sliding bearing housing;

[0008] The third bolt is connected to the end of the bellows away from the valve box housing;

[0009] The third bolt is positioned between the first bolt and the second bolt.

[0010] Optionally, the bellows and the flange orifice plate are sealed together by a third bolt.

[0011] Optionally, the sealing gland and the sliding bearing assembly are connected by a fourth bolt, which is used for the sealing gland to abut against the sealing assembly.

[0012] Optionally, the sealing gland is split.

[0013] Optionally, the end of the bellows near the valve housing is connected to the valve housing via a fifth bolt;

[0014] Along the radial direction of the bellows, the fifth bolt is positioned closer to the axis of the bellows than the first bolt.

[0015] Optionally, the sliding bearing package includes:

[0016] The main body has an inner hole for accommodating a sliding bearing, a sealing assembly, and a sealing gland;

[0017] The outwardly lapped portion connects to one end of the main body and overlaps with the flange orifice plate to form a connection position for bolting the sliding bearing housing to the flange orifice plate; and

[0018] The inward limiting part is connected to the other end of the main body and a regulating valve shaft is inserted through it.

[0019] Optionally, the outer edge of the flange orifice plate overlaps with the inner edge of the hole in the hanger orifice plate to form a connection position for bolting the flange orifice plate and the hanger orifice plate.

[0020] Optionally, the third bolt is equipped with a sealing gasket.

[0021] Optionally, the sealing gland is configured in a two-part design.

[0022] The beneficial effects of this application are as follows: This application provides a bellows sealing assembly connection device for a valve box of a smelting equipment, including a bellows, a flange orifice plate, a sliding bearing housing, a sliding bearing, a sealing gland, and a sealing assembly. The bellows is installed between the valve box housing and the regulating valve hanger. A weighing device configured on the valve box housing is connected to the regulating valve hanger. The regulating valve hanger includes a hanger orifice plate facing the valve box housing and having holes. The flange orifice plate is bolted to the holes in the hanger orifice plate. The axial ends of the bellows are respectively bolted to the flange orifice plate and the valve box housing. The sliding bearing housing is bolted to the flange orifice plate and passes through the flange orifice plate and the bellows. The sliding bearing is interference-fitted to the bottom of the inner hole of the sliding bearing housing. The sealing gland is bolted to the top of the inner hole of the sliding bearing housing. The sealing assembly is installed in the inner hole of the sliding bearing housing. The sealing assembly is located between the sliding bearing and the sealing gland. The regulating valve shaft of the material flow regulating valve configured in the valve housing passes through the sealing gland, the sealing assembly, and the sliding bearing. Holes are drilled in the plate facing the valve housing in the regulating valve hanger to form a hanger orifice plate with mounting holes. These holes, along with the flange orifice plate, sliding bearing housing, bellows, and sealing gland, are bolted together. Regular replacement of the bellows and the sealing assembly within the sliding bearing housing is facilitated by removing the corresponding bolts. This device solves the mechanical connection and sealing requirements arising from the small vertical displacement of the regulating valve and the rotational movement of the regulating valve shaft required for weighing. It enables online maintenance and replacement of the vulnerable bellows and sealing assembly, offering the advantages of easy repair, disassembly, and enhanced sealing. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0024] Figure 1 This application provides a structural schematic diagram of a bellows sealing assembly connection device for a valve box of a smelting equipment.

[0025] Attached diagram labels: 1-First steel plate, 2-Second steel plate, 3-Control valve hanger, 4-Control valve shaft, 5-Flange orifice plate, 6-Hanger orifice plate, 7-Sealing assembly, 8-Sliding bearing, 9-Sliding bearing housing, 10-Control valve, 11-Valve box housing, 12-Fifth bolt, 13-Bellboard, 14-Third bolt, 15-First bolt, 16-Second bolt, 17-Sealing gland, 18-Fourth bolt. Detailed Implementation

[0026] This application provides a bellows sealing assembly connection device for a valve box of a smelting equipment, which solves the technical problems of mechanical connection and sealing requirements caused by the need for small vertical displacement of the regulating valve and the rotational movement of the regulating valve shaft for weighing.

[0027] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0028] A bellows sealing assembly connection device for a valve box of a smelting equipment includes a bellows, a flange orifice plate, a sliding bearing housing, a sliding bearing, a sealing gland, and a sealing assembly. The bellows is installed between the valve box housing and the regulating valve hanger. A weighing device configured on the valve box housing is connected to the regulating valve hanger. The regulating valve hanger includes a hanger orifice plate facing the valve box housing and having holes. The flange orifice plate is bolted to the holes in the hanger orifice plate. The axial ends of the bellows are bolted to the flange orifice plate and the valve box housing, respectively. The sliding bearing housing is bolted to the flange orifice plate and passes through the flange orifice plate and the bellows. The sliding bearing is interference-fitted to the bottom of the inner hole of the sliding bearing housing. The sealing gland is bolted to the top of the inner hole of the sliding bearing housing. The sealing assembly is installed in the inner hole of the sliding bearing housing and is located between the sliding bearing and the sealing gland. The regulating valve shaft of the material flow regulating valve configured on the valve box housing passes through the sealing gland, the sealing assembly, and the sliding bearing.

[0029] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0030] In the blast furnace ironmaking process, the top charging equipment is used to charge the furnace and ensure its proper distribution within the furnace, while also providing a seal at the furnace top. The lower valve box of the top charging equipment consists of a valve box shell, a material flow regulating valve, a lower sealing valve, an anti-torsion device, and a weighing device. Its main functions are to regulate and control the flow rate of the furnace charge and to seal the furnace gas. The valve box shell is a fixed component; during the top charging process, it is filled with high-temperature, high-pressure, dust-laden furnace gas. When adding material to the top charging equipment's hopper, the pressure inside is at atmospheric level.

[0031] The working principle of the lower valve box is as follows: after the weighing tank is pressurized, the hydraulic cylinder is operated to open the lower material flow regulating valve and the lower sealing valve, allowing the furnace charge to be loaded into the furnace from the weighing tank through the octagonal chute. Before depressurizing the weighing tank, the material flow regulating valve and the lower sealing valve are closed to ensure furnace gas sealing, and then the pressure is released.

[0032] The specific operation of the material flow regulating valve includes: the valve plate is fixed on the rocker arm, the hydraulic cylinder is driven to rotate the rocker arm, and the valve plate is driven to complete the opening and closing action.

[0033] The weighing device generates vertical displacement for weighing purposes. This vertical movement of the regulating valve hanger drives the material flow regulating valve to move up and down as well. The valve housing remains stationary, while the sealing bellows is subjected to alternating lateral and angular displacements, making it susceptible to fatigue failure and corrosion from high-temperature, high-pressure, dusty, and toxic furnace gases. The sealing components of the material flow regulating valve are also subjected to the pulsed action of high-temperature, high-pressure, dusty furnace top gases, leading to aging and a gradual decrease in sealing effectiveness.

[0034] Regarding the aforementioned sealing bellows being subjected to alternating lateral and angular displacements, the lateral displacement can be understood as the radial direction of the bellows. The relevant displacements arise from the following: the up-and-down movement of the weighing device when the weighed object changes, which is reflected in the movement of the regulating valve hanger within ±4mm. It cannot be guaranteed that the direction of movement is absolutely vertical. During the process, the bellows is torn, which means it will be subjected to alternating angular displacement. One end of the bellows is connected to the regulating valve hanger, and the other end is connected to the valve housing. The valve housing is a fixed part and does not move, while the regulating valve hanger has an up-and-down movement process, which causes the bellows to be subjected to alternating lateral displacement.

[0035] This embodiment provides a bellows sealing assembly connection device for a valve box of a smelting equipment, including a bellows 13, a flange orifice plate 5, a sliding bearing housing 9, a sliding bearing 8, a sealing gland 17, and a sealing assembly 7. Specifically:

[0036] The bellows 13 is installed between the valve box housing 11 and the regulating valve hanger 3. The weighing device configured on the valve box housing 11 is connected to the regulating valve hanger 3. The regulating valve hanger 3 includes a hanger orifice plate 6 facing the valve box housing 11 and having holes.

[0037] The flange orifice plate 5 is bolted to the holes in the hanger orifice plate 6;

[0038] The two axial ends of the bellows 13 are respectively connected to the flange orifice plate 5 and the valve box housing 11 by bolts;

[0039] The sliding bearing assembly 9 is bolted to the flange orifice plate 5, and the sliding bearing assembly 9 passes through the flange orifice plate 5 and the bellows 13.

[0040] The sliding bearing 8 is interference-fitted to the bottom of the inner hole of the sliding bearing housing 9;

[0041] The sealing gland 17 is bolted to the top of the inner hole of the sliding bearing housing 9;

[0042] The sealing assembly 7 is installed in the inner hole of the sliding bearing housing 9, and the sealing assembly 7 is located between the sliding bearing 8 and the sealing cover 17.

[0043] The regulating valve shaft 4 of the material flow regulating valve 10 configured in the valve housing 11 passes through the sealing cover 17, the sealing assembly 7 and the sliding bearing 8.

[0044] In detail, the sliding bearing 8 and the sliding bearing housing 9 are interference-fitted, while the sliding bearing 8 and the regulating valve shaft 4 are clearance-fitted, thus realizing the rotational movement of the regulating valve 10. For example... Figure 1 As shown, the axial positioning of the regulating valve 10 is achieved through the cooperation of the shoulder of the regulating valve shaft 4 and the sliding bearing 8. By adjusting the tightness of the sealing gland 17 against the sealing assembly 7, the tightness between the sealing assembly 7 and the regulating valve shaft 4 can be strengthened, ensuring good sealing performance of the sealing assembly 7 during production and maintenance.

[0045] This device solves the mechanical connection and sealing requirements caused by the small vertical displacement of the regulating valve 10 and the rotational movement of the regulating valve shaft 4 required for weighing. It effectively seals the gas pulsation effect of the high-temperature and high-pressure furnace and realizes the movement requirements of the regulating valve 10.

[0046] By setting up the hanger orifice plate 6, sliding bearing housing 9, sealing gland 17 and related bolt connections, the feasibility of online maintenance and replacement of the sealing assembly 7 can be realized.

[0047] By setting up the hanger orifice plate 6, flange orifice plate 5 and related bolt connections, it is feasible to maintain and replace the vulnerable bellows 13 online, which has the advantages of easy maintenance, disassembly and enhanced sealing effect.

[0048] Alternatively, please refer to Figure 1 The flange orifice plate 5 is connected to the hanger orifice plate 6 by the first bolt 15, and to the sliding bearing housing 9 by the second bolt 16. The flange orifice plate 5 is connected to the end of the bellows 13 away from the valve box housing 11 by the third bolt 14, wherein the third bolt 14 is located between the first bolt 15 and the second bolt 16. By positioning the third bolt 14, the bolt connection and disassembly of the flange orifice plate 5 and the bellows 13 are not adversely restricted by the hanger orifice plate 6 and the sliding bearing housing 9, making the device flexible and convenient for actual operation during assembly and disassembly.

[0049] Optionally, the bellows 13 and the flange orifice plate 5 are sealed together by a third bolt 14. The sealed connection can be achieved by placing a gasket on the bolt. The sealed connection is used to prevent the high-temperature and high-pressure furnace gas from escaping from the bellows 13.

[0050] Alternatively, please refer to Figure 1The sealing gland 17 and the sliding bearing housing 9 are connected by a fourth bolt 18, which is used for the sealing gland 17 to abut against the sealing assembly 7. By controlling the tightness of the fourth bolt 18, the sealing gland 17 and the sealing assembly 7 are made to have tight contact, so that the sealing assembly 7 can achieve its sealing performance smoothly. Furthermore, if the sealing performance of the sealing assembly 7 may become defective after working for a period of time, it can be adjusted again by using the sealing gland 17 and the fourth bolt 18. If this is still not enough, the sealing assembly 7 should be replaced periodically.

[0051] Regarding sealing component 7, the combined effect of packing seal and compression seal can be selected.

[0052] Alternatively, please refer to Figure 1 The bellows 13 is connected to the valve housing 11 at one end near the valve housing 11 via a fifth bolt 12. Along the radial direction of the bellows 13, the fifth bolt 12 is positioned closer to the axis of the bellows 13 than the first bolt 15. Specifically, in terms of installation sequence, when the aforementioned device is installed onto the valve housing 11, the installation of the fifth bolt 12 must be performed first. This arrangement mitigates the unfavorable obstruction of the fifth bolt 12 installation space by the hanger orifice plate 6, facilitating the smooth installation of the fifth bolt 12 and the bolting of the bellows 13 to the valve housing 11.

[0053] Optionally, the sealing gland 17 is provided in a split configuration, for example, in a two-part configuration. The split design facilitates the installation of the sealing gland 17 into the sliding bearing housing 9.

[0054] Alternatively, please refer to Figure 1 The sliding bearing assembly 9 includes a main body, an outward overlapping part, and an inward limiting part. The outward overlapping part and the inward limiting part are respectively connected to the two ends of the main body along the axial direction. The main body is provided with an inner hole to accommodate the sliding bearing 8, the sealing assembly 7, and the sealing cover 17. The outward overlapping part overlaps with the flange orifice plate 5 to form a connection position for bolting the sliding bearing assembly 9 to the flange orifice plate 5. The inward limiting part is connected to the other end of the main body, and the regulating valve shaft 4 passes through the inward limiting part.

[0055] The "outward" of the outward overlapping part refers to its radial outward orientation relative to the main body; the "inward" of the inward limiting part refers to its radial inward orientation relative to the main body. The aforementioned sliding bearing assembly 9 provides mounting positions for related bolt connections, facilitating the installation of the regulating valve shaft 4, sliding bearing 8, sealing assembly 7, and sealing gland 17.

[0056] Alternatively, please refer to Figure 1 The outer edge of the flange orifice plate 5 overlaps with the inner edge of the hole position of the hanger orifice plate 6 to form a connection position for bolt connection between the flange orifice plate 5 and the hanger orifice plate 6. The outer edge of the flange orifice plate 5 and the inner edge of the hole position of the hanger orifice plate 6 are both stepped.

[0057] Optionally, in the valve box bellows sealing assembly connection device of the smelting equipment, the regulating valve hanger 3 includes a hanger orifice plate 6, a first steel plate 1 connected to the hanger orifice plate 6, and a second steel plate 2 connected to the hanger orifice plate 6 and the first steel plate 1. The beneficial effect includes improving the structural strength of the regulating valve hanger 3.

[0058] Based on the above-mentioned valve box bellows sealing assembly connection device for smelting equipment, this embodiment also provides an installation method for the valve box bellows sealing assembly connection device for smelting equipment, including:

[0059] The regulating valve 10 is hoisted into the valve box housing 11 as a whole;

[0060] The bellows 13 is connected to the valve box housing 11 by bolts;

[0061] The sliding bearing 8 and the sliding bearing assembly 9 are connected by heat fitting to achieve an interference fit.

[0062] Fasten the flange orifice plate 5 to the hanger orifice plate 6 with bolts;

[0063] The sliding bearing assembly 9, together with the sliding bearing 8, is fastened to the flange orifice plate 5 by bolts.

[0064] The sliding bearing 8 and the regulating valve shaft 4 are automatically connected with a clearance fit.

[0065] Install the sealing assembly 7 into the sliding bearing housing 9;

[0066] Connect the sealing gland 17 to the flange orifice plate 5 with bolts, and tighten the sealing assembly 7. The tightness shall be determined by the fact that the overall airtightness test of the valve box does not leak.

[0067] The bellows 13 is fastened and sealed to the flange orifice plate 5 by bolts.

[0068] This embodiment also provides a method for disassembling the bellows sealing assembly connection device of the valve box of smelting equipment. Specifically, the installation method described above is performed in reverse order to disassemble each component.

[0069] Some possible implementations of the bellows sealing assembly connection device for the valve box of the above-mentioned smelting equipment: Regarding the periodic replacement of the sealing assembly 7, the sealing gland 17 is removed by disassembling the fourth bolt 18; Regarding the periodic replacement of the bellows 13, the flange orifice plate 5, the sliding bearing 8, the sliding bearing housing 9 and the bellows 13 are removed together by disassembling the first bolt 15, the third bolt 14 and the fifth bolt 12 for replacement.

[0070] It should also be noted that the above is one possible implementation method for the installation of the bellows sealing assembly connection device for the valve box of smelting equipment, and the steps therein can be changed in sequence.

[0071] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0072] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A connecting device for a bellows sealing assembly of a valve box in smelting equipment, characterized in that, include: A bellows is installed between the valve box housing and the regulating valve hanger. The weighing device configured on the valve box housing is connected to the regulating valve hanger. The regulating valve hanger includes a hanger orifice plate facing the valve box housing and having holes. The flange orifice plate is bolted to the holes in the hanger orifice plate, and the two axial ends of the bellows are respectively bolted to the flange orifice plate and the valve box housing; A sliding bearing assembly is bolted to the flange orifice plate and passes through the flange orifice plate and the bellows. A sliding bearing, interference-fitted to the bottom of the inner hole of the sliding bearing assembly; A sealing gland is bolted to the top of the inner hole of the sliding bearing assembly; A sealing assembly is installed in the inner hole of the sliding bearing housing and is located between the sliding bearing and the sealing gland; The regulating valve shaft of the material flow regulating valve configured in the valve box housing passes through the sealing cover, the sealing assembly, and the sliding bearing.

2. The valve box bellows sealing assembly connection device for smelting equipment as described in claim 1, characterized in that, The flange orifice plate passes through: The first bolt is connected to the hanger hole plate; The second bolt is connected to the sliding bearing assembly; The third bolt is connected to the end of the bellows away from the valve box housing; The third bolt is disposed between the first bolt and the second bolt.

3. The valve box bellows sealing assembly connection device for smelting equipment as described in claim 2, characterized in that, The bellows and the flange orifice plate are sealed together by the third bolt.

4. The valve box bellows sealing assembly connection device for smelting equipment as described in claim 1, characterized in that, The sealing gland is connected to the sliding bearing assembly by a fourth bolt, which is used for the sealing gland to abut against the sealing assembly.

5. The valve box bellows sealing assembly connection device for smelting equipment as described in claim 1 or 4, characterized in that, The sealing cap is designed in a split configuration.

6. The valve box bellows sealing assembly connection device for smelting equipment as described in claim 2, characterized in that, The end of the bellows near the valve box housing is connected to the valve box housing by a fifth bolt; Along the radial direction of the bellows, the fifth bolt is positioned closer to the axis of the bellows than the first bolt.

7. The valve box bellows sealing assembly connection device for smelting equipment as described in any one of claims 1-4, characterized in that, The sliding bearing package includes: The main body is provided with an inner hole for accommodating the sliding bearing, the sealing assembly, and the sealing gland; An outwardly lapped portion, connected to one end of the main body, overlaps with the flange orifice plate to form a connection position for bolting the sliding bearing assembly to the flange orifice plate; and An inward limiting part is connected to the other end of the main body and passes through the regulating valve shaft.

8. The valve box bellows sealing assembly connection device for smelting equipment as described in any one of claims 1-4, characterized in that, The outer edge of the flange orifice plate overlaps with the inner edge of the hole position of the hanger orifice plate to form a connection position for bolting the flange orifice plate and the hanger orifice plate.

9. The valve box bellows sealing assembly connection device for smelting equipment as described in claim 3, characterized in that, The third bolt is equipped with a sealing gasket.

10. The valve box bellows sealing assembly connection device for smelting equipment as described in claim 5, characterized in that, The sealing cap is configured in two parts.

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