Manhole sealing connection structure

Abstract

The utility model relates to the technical field of metallurgical industry, in particular to a manhole sealing and connecting structure which comprises a connecting hole formed in the outer wall of a gas sealing cover. A maintenance pipe is fixed in the connecting hole, a maintenance hole main body is arranged in the maintenance pipe, and a sealing plug is connected in the maintenance hole main body; the two-way screw rod is rotated through the rotating shaft, the two shaft sleeves can drive the two clamping strips to do positive relative motion under the driving of the two-way screw rod, after clamping grooves of the two clamping strips are located outside a connecting ring, the two clamping strips can limit the connecting ring, and therefore the connecting ring can be clamped conveniently, and the service life of the connecting ring is prolonged. Compared with the prior art, the sealing plug can be limited, so that the sealing plug is prevented from being loosened in the manhole main body due to the external influence, the stability of the sealing plug is improved, and the sealing performance of the gas sealing cover and the whole blast furnace top equipment is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of the metallurgical industry, specifically to a sealing connection structure for inspection holes. Background Technology

[0002] Blast furnace ironmaking involves charging iron ore, coke, and flux into a blast furnace, blowing hot air into the bottom, and burning the coke at high temperatures to produce carbon monoxide that reduces the iron in the ore, resulting in molten iron and slag. The molten iron is tapped from the taphole, the slag is discharged from the slag outlet, and the generated gas can be used as industrial fuel. Blast furnace ironmaking has advantages such as simple process, high production capacity, high labor productivity, and relatively low energy consumption, making it the main method of modern ironmaking.

[0003] The blast furnace top equipment is the core equipment of the blast furnace, among which the airtight box and the charging chute are key devices for achieving multi-ring charging. The inspection port is located on the gas cover near the charging chute. When replacing the charging chute, the inspection port needs to be opened and used for entry and exit. During normal production, the inspection port must be sealed to prevent gas leakage. China Patent Network discloses a sealing structure for the inspection port of the water-cooled chute in the blast furnace top (publication number CN210127251U). Although this structure avoids damage to the water-cooled guide pipe and cooling water channel, provides good sealing, and eliminates water and gas leakage into the furnace, the inspection port cover in this patent is fixed to the water-cooled inspection port seat with fastening bolts. However, the fastening bolts lack corresponding limiting structures, making them susceptible to loosening under long-term external influences. This affects the stability of the inspection port cover and consequently the overall sealing performance of the blast furnace top equipment.

[0004] Therefore, a sealing connection structure for inspection holes is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing connection structure for inspection holes.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sealing connection structure for an inspection hole, comprising:

[0008] Connection holes are made on the outer wall of the gas seal;

[0009] An inspection tube is fixed inside the connection hole, and an inspection hole body is provided inside the inspection tube. A sealing plug is connected inside the inspection hole body.

[0010] The inner wall of the inspection hole body is provided with internal threads, and the outer wall of the sealing plug is provided with external threads. The sealing plug is threadedly connected to the inside of the inspection hole body through the external threads and the internal threads.

[0011] The outer wall of the sealing plug is provided with a limiting structure.

[0012] Preferably, a transparent observation window is installed at one end of the sealing plug.

[0013] Preferably, the outer wall of the sealing plug is fixed with rotating teeth.

[0014] Preferably, a receiving ring is fixed inside the inspection hole body, and a sealing groove is opened at one end of the receiving ring near the sealing plug. A sealing ring located inside the sealing groove is installed at one end of the sealing plug near the receiving ring.

[0015] Preferably, the limiting structure includes a connecting ring fixed to the outer wall of the sealing plug, and a first support bar and a second support bar are fixed to the outer wall of the gas sealing cover. The outer walls of the first support bar and the second support bar are each provided with mounting holes. A bearing is installed in the mounting hole, and a bidirectional screw is installed in the bearing. A rotating shaft is fixed to one end of the bidirectional screw. Two bushings are installed on the outer wall of the bidirectional screw. A clamping strip is fixed to the outer wall of each of the two bushings. A clamping groove is provided on the outer wall of the clamping strip, and the connecting ring is located inside the clamping groove.

[0016] Preferably, the outer wall of the second support bar is fixed with a connecting lug, the top of the connecting lug is provided with a threaded hole, a threaded rod is threadedly connected to the threaded hole, the outer wall of the bidirectional screw is provided with a locking hole, the top of the threaded rod is fixed with a knob, and the bottom of the threaded rod is locked inside the locking hole.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention utilizes a rotating shaft to rotate a bidirectional screw. Driven by the bidirectional screw, two bushings cause two clamping bars to move in opposite directions. Once the clamping grooves of the two clamping bars are outside the connecting ring, the two clamping bars limit the connection ring, thereby limiting the sealing plug. Compared to existing designs, this invention can limit the sealing plug, thus preventing it from loosening inside the inspection hole body due to external influences, improving the stability of the sealing plug, and consequently improving the sealing performance of the gas cover and the entire blast furnace top equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This utility model Figure 1 A magnified structural diagram of A in the middle;

[0021] Figure 3 This is a schematic diagram of the connection structure between the inspection tube and the sealing plug in this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the inspection pipe in this utility model;

[0023] Figure 5 This is a schematic diagram of the sealing plug structure in this utility model.

[0024] In the diagram: 1. Gas sealing cover; 2. Connecting hole; 3. Inspection pipe; 4. Sealing plug; 5. Transparent observation window; 6. Rotating tooth; 7. Internal thread; 8. External thread; 9. Receiving ring; 10. Sealing groove; 11. Sealing ring; 12. Connecting ring; 13. First support bar; 14. Second support bar; 15. Mounting hole; 16. Double-acting screw; 17. Bushing; 18. Clamping bar; 19. Clamping groove; 20. Rotating shaft; 21. Connecting lug; 22. Threaded hole; 23. Threaded rod; 24. Knob; 25. Locking hole; 26. Inspection hole body; 27. Bearing. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] 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.

[0027] Example 1:

[0028] Please see Figure 1-5This utility model provides a technical solution: To achieve the above objectives, this utility model provides the following technical solution: A sealing connection structure for an inspection hole, comprising: a connecting hole 2 opened on the outer wall of a gas sealing cover 1; an inspection pipe 3 fixed inside the connecting hole 2, an inspection hole body 26 provided inside the inspection pipe 3, and a sealing plug 4 connected inside the inspection hole body 26; an internal thread 7 provided on the inner wall of the inspection hole body 26, and an external thread 8 provided on the outer wall of the sealing plug 4, the sealing plug 4 being threadedly connected to the inside of the inspection hole body 26 through the external thread 8 engaging with the internal thread 7; a limiting structure provided on the outer wall of the sealing plug 4, the limiting structure including a connecting ring 12 fixed on the outer wall of the sealing plug 4, and a first support 13 and a second support 14 fixed on the outer wall of the gas sealing cover 1. The outer walls of the first support bar 13 and the second support bar 14 are provided with mounting holes 15. A bearing 27 is installed in the mounting hole 15. A double-acting screw 16 is installed in the bearing 27. A rotating shaft 20 is fixed to one end of the double-acting screw 16. Two bushings 17 are installed on the outer wall of the double-acting screw 16. A clamping bar 18 is fixed to the outer wall of each bushing 17. A clamping groove 19 is provided on the outer wall of the clamping bar 18. A connecting ring 12 is located inside the clamping groove 19. A connecting ear 21 is fixed to the outer wall of the second support bar 14. A threaded hole 22 is provided at the top of the connecting ear 21. A threaded rod 23 is connected to the threaded rod 23 by a thread 7 inside the threaded hole 22. A locking hole 25 is provided on the outer wall of the double-acting screw 16. A knob 24 is fixed to the top of the threaded rod 23. The bottom of the threaded rod 23 is locked inside the locking hole 25.

[0029] Specifically, this utility model rotates the bidirectional screw 16 via the rotating shaft 20. Driven by the bidirectional screw 16, the two bushings 17 drive the two clamping bars 18 to move in opposite directions. After the clamping grooves 19 of the two clamping bars 18 are located outside the connecting ring 12, the two clamping bars 18 limit the connecting ring 12, thereby limiting the sealing plug 4. Compared with the existing ones, this utility model can limit the sealing plug 4, thereby preventing the sealing plug 4 from loosening inside the inspection hole body 26 due to external influences, improving the stability of the sealing plug 4, and thus improving the sealing performance of the gas cover 1 and the entire blast furnace top equipment.

[0030] After the clamping grooves 19 of the two clamping bars 18 are located outside the connecting ring 12, the knob 24 is rotated. The knob 24 drives the threaded rod 23 to descend within the threaded hole 22. After the bottom of the threaded rod 23 is engaged with the inside of the locking hole 25, the bidirectional screw 16 can be fixed, thereby achieving the purpose of limiting the two clamping bars 18. This improves the limiting effect of the clamping bars 18 and clamping grooves 19 on the sealing plug 4, and further enhances the stability of the sealing plug 4.

[0031] Example 2:

[0032] Please see Figure 1 , 3-5. This utility model provides a technical solution: a sealing connection structure for an inspection hole, wherein a transparent observation window 5 is installed at one end of the sealing plug 4, a rotating tooth 6 is fixed on the outer wall of the sealing plug 4, a receiving ring 9 is fixed inside the inspection hole body 26, a sealing groove 10 is opened at one end of the receiving ring 9 near the sealing plug 4, and a sealing ring 11 located inside the sealing groove 10 is installed at one end of the sealing plug 4 near the receiving ring 9.

[0033] Specifically, please refer to Embodiment 1. By providing a transparent observation window 5, staff can observe the internal condition of the equipment, which greatly improves maintenance efficiency. By providing a rotating tooth 6, staff can easily rotate the sealing plug 4, thereby facilitating the disassembly of the sealing plug 4.

[0034] Because a receiving ring 9 is fixed inside the inspection hole body 26, and a sealing groove 10 is provided at one end of the receiving ring 9 near the sealing plug 4, and a sealing ring 11 is installed at one end of the sealing plug 4 near the receiving ring 9, which is located inside the sealing groove 10, the sealing performance at the connection between the sealing plug 4 and the inspection hole body 26 can be improved by the cooperation of the sealing ring 11 and the sealing groove 10. Furthermore, since the sealing plug 4 is threaded inside the inspection hole body 26 through the external thread 8 and the internal thread 7, the threaded connection of the internal thread 7 and the external thread 8 has a good sealing effect, so the sealing performance at the connection between the sealing plug 4 and the inspection hole body 26 is good.

[0035] Working principle:

[0036] When installing the sealing plug 4, the operator can use the rotating gear 6 to lower the sealing plug 4 into the inspection hole body 26 through the cooperation of the internal thread 7 and the external thread 8. Since a receiving ring 9 is fixed inside the inspection hole body 26, and a sealing groove 10 is opened at the end of the receiving ring 9 near the sealing plug 4, a sealing ring 11 is installed at the end of the sealing plug 4 near the receiving ring 9, located inside the sealing groove 10. The cooperation of the sealing ring 11 and the sealing groove 10 can improve the sealing performance at the connection between the sealing plug 4 and the inspection hole body 26. Furthermore, since the sealing plug 4 is threaded into the inspection hole body 26 through the cooperation of the external thread 8 and the internal thread 7, the thread connection of the internal thread 7 and the external thread 8 has a good sealing effect. Therefore, the sealing performance at the connection between the sealing plug 4 and the inspection hole body 26 is good. Then, the operator uses the rotating shaft 20 to rotate the bidirectional screw 16. At this time, the bidirectional screw 16 will be on the shaft of the mounting holes 15 of the first support 13 and the second support 14. The bearing 27 rotates internally. Driven by the bidirectional screw 16, the two bushings 17 drive the two clamping bars 18 to move in opposite directions. After the clamping grooves 19 of the two clamping bars 18 are outside the connecting ring 12, the two clamping bars 18 limit the connecting ring 12, and then limit the sealing plug 4. After the clamping grooves 19 of the two clamping bars 18 are outside the connecting ring 12, the operator rotates the knob 24. The knob 24 drives the threaded rod 23 to move downward in the threaded hole 22. After the bottom of the threaded rod 23 is engaged in the hole 25, the bidirectional screw 16 can be fixed, thereby achieving the purpose of limiting the two clamping bars 18. This improves the limiting effect of the clamping bars 18 and clamping grooves 19 on the sealing plug 4, and further enhances the stability of the sealing plug 4. With the transparent observation window 5, the operator can observe the internal condition of the equipment, which greatly improves the maintenance efficiency.

[0037] When disassembling the sealing plug 4, the worker first uses the knob 24 to rotate the threaded rod 23. At this time, the threaded rod 23 moves upward in the threaded hole 22. After the bottom of the threaded rod 23 is disengaged from the retaining hole 25, the worker then uses the rotating shaft 20 to rotate the bidirectional screw 16 in the opposite direction. At this time, the two bushings 17 drive the two clamping bars 18 to move away from each other. After the clamping grooves 19 of the two clamping bars 18 are disengaged from the outside of the connecting ring 12, the worker then uses the rotating gear 6 to rotate the sealing plug 4 (rotating in the opposite direction of the connection direction of the internal thread 7 and the external thread 8) to disassemble the sealing plug 4.

[0038] In the description of this utility model, it should be understood that the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sealing connection structure for an inspection hole, characterized in that, include: Connection hole (2) is opened on the outer wall of the gas seal (1); A maintenance tube (3) is fixed inside the connection hole (2), and a maintenance hole body (26) is provided inside the maintenance tube (3). A sealing plug (4) is connected inside the maintenance hole body (26). The inner wall of the inspection hole body (26) is provided with an internal thread (7), and the outer wall of the sealing plug (4) is provided with an external thread (8). The sealing plug (4) is threadedly connected to the inside of the inspection hole body (26) through the external thread (8) and the internal thread (7). The sealing plug (4) has a limiting structure on its outer wall.

2. The inspection hole sealing connection structure according to claim 1, characterized in that, A transparent observation window (5) is installed at one end of the sealing plug (4).

3. The inspection hole sealing connection structure according to claim 1, characterized in that, The outer wall of the sealing plug (4) is fixed with rotating teeth (6).

4. The inspection hole sealing connection structure according to claim 1, characterized in that, The inspection hole body (26) is fixed with a receiving ring (9). The receiving ring (9) has a sealing groove (10) at one end near the sealing plug (4). The sealing plug (4) has a sealing ring (11) installed at one end near the receiving ring (9) inside the sealing groove (10).

5. The inspection hole sealing connection structure according to claim 1, characterized in that, The limiting structure includes a connecting ring (12) fixed to the outer wall of the sealing plug (4). The outer wall of the gas cover (1) is fixed with a first support (13) and a second support (14). The outer walls of the first support (13) and the second support (14) are provided with mounting holes (15). A bearing (27) is installed in the mounting hole (15). A bidirectional screw (16) is installed in the bearing (27). A rotating shaft (20) is fixed at one end of the bidirectional screw (16). Two bushings (17) are installed on the outer wall of the bidirectional screw (16). A clamping strip (18) is fixed on the outer wall of the two bushings (17). A clamping groove (19) is provided on the outer wall of the clamping strip (18). The connecting ring (12) is located inside the clamping groove (19).

6. The inspection hole sealing connection structure according to claim 5, characterized in that, The second support bar (14) has a connecting lug (21) fixed on its outer wall. The connecting lug (21) has a threaded hole (22) at its top. The threaded hole (22) has an internal thread (7) connected to a threaded rod (23). The double screw (16) has a locking hole (25) on its outer wall. The threaded rod (23) has a knob (24) fixed at its top. The bottom of the threaded rod (23) is locked inside the locking hole (25).

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