Combined sealing joint for sealing gap between tail part of converter sublance and cable

Abstract

The utility model relates to a combined sealing joint for sealing a gap between the tail part of a converter sublance and a cable, which comprises a two-way threaded joint, the two-way threaded joint is a stepped cylindrical joint, one end of the two-way threaded joint is in threaded connection with an inner nut, and the other end of the two-way threaded joint is in threaded connection with an inner threaded joint. The end, connected with the inner nut, of the two-way threaded connector is provided with a wedge face cavity, a sealing element is arranged in the wedge face cavity in a matched mode, the height of the sealing element is larger than that of the wedge face cavity, and the axial centers of the two-way threaded connector, the inner nut and the sealing element are each provided with a through hole for a cable to pass through. The utility model has the beneficial effects that the sealing element generates elastic deformation, the sealing strength is improved, the leakage of high-pressure nitrogen is avoided, the potential safety hazard caused by the overflow of high-pressure gas is avoided, the energy utilization efficiency is improved, and the production cost of converter steelmaking is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing a converter auxiliary gun tail and a cable gap, in particular to a combined sealing joint for sealing a converter auxiliary gun tail and a cable gap. Background Art

[0002] The auxiliary lance refers to a metal lance that is similar to the oxygen lance and can be raised and lowered and directly inserted into the molten pool, in addition to the oxygen lance that supplies oxygen to the oxygen top-blown converter. The end of the auxiliary lance can be equipped with probes with different functions to measure the temperature, composition and other information in the furnace during the smelting process. The probe is usually located at the front end of the auxiliary lance, and the probe is connected to the control system by a cable, which is hidden in the center tube of the auxiliary lance.

[0003] Traditional cable and sub-gun connections are mostly directly connected by the cable and the nitrogen pipe of the sub-gun. The high-pressure gas in the sub-gun leaks seriously at the connection position and is basically in a semi-released state, which greatly increases the supply cost of nitrogen. The leaked high-pressure gas causes personal injury to the surrounding personnel. At the same time, the traditional direct-connected cable and nitrogen pipe have an unadjustable cable length, which limits the use of the sub-gun, and the connection position will cause damage to the cable, affecting the use of the sub-gun, increasing leakage, and increasing production costs. Summary of the invention

[0004] In order to solve the technical problem of serious leakage in the connection gap between the auxiliary gun and the cable, the utility model provides a combined sealing joint for sealing the gap between the tail of the auxiliary gun of the converter and the cable. Through a stepped two-way threaded joint, one end is threadedly connected to an internal nut, and the other end is threadedly connected to the internal threaded joint. A sealing element is arranged at one end of the two-way threaded joint connected to the internal nut. In the process of tightening the internal nut and the two-way threaded joint, the sealing elements inside the two are elastically deformed by the radial pressure and the axial pressure at the same time. The elastic deformation is utilized to greatly fill the gap between the cable and the hole, thereby playing a sealing role, greatly reducing the leakage of high-pressure nitrogen, avoiding the safety hazard caused by the overflow of high-pressure gas, improving energy utilization efficiency, and reducing the production cost of converter steelmaking.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A combined sealing joint for sealing the gap between the tail of a converter auxiliary gun and a cable, comprising a two-way threaded joint, wherein the two-way threaded joint is a stepped cylindrical joint, wherein one end of the two-way threaded joint is threadedly connected to an internal nut, and the other end of the two-way threaded joint is threadedly connected to the internal threaded joint, wherein a wedge surface cavity is provided at the end of the two-way threaded joint connected to the internal nut, wherein a sealing element is arranged in the wedge surface cavity, wherein the height of the sealing element is greater than the height of the wedge surface cavity, and wherein the axial centers of the two-way threaded joint, the internal nut and the sealing element are all provided with through holes for the passage of cables.

[0007] Furthermore, the sealing element is made of a sealing material having elastic deformation properties.

[0008] Furthermore, the diameter of the through hole is larger than the diameter of the cable.

[0009] Furthermore, the internal threaded joint is a steel pipe provided with internal threads.

[0010] Furthermore, the other end of the internal threaded joint is connected to a nitrogen pipe.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The internal thread of the internal nut is connected with the external thread of the two-way threaded joint. During the process of tightening the threads of the internal nut and the two-way threaded joint, the sealing elements inside the two are subjected to the radial pressure of the wedge-shaped inner cavity and the axial pressure of the top end face of the internal nut. The tighter the tightening, the greater the pressure, and the sealing element produces elastic deformation, which greatly fills the gap between the cable and the hole, thereby playing a sealing role. The sealing element is compressed and blocks the gap at the end of the two-way threaded joint, thereby improving the sealing strength, avoiding the leakage of high-pressure nitrogen, avoiding the safety hazards caused by the overflow of high-pressure gas, improving energy utilization efficiency, and reducing the production cost of converter steelmaking.

[0013] 2. Use an internal nut to buckle the end of the two-way threaded joint, fully wrap the outlet end of the entire sealing joint, and wrap the sealing joint inside the internal nut to prevent air leakage, improve the reliability of the seal, and further improve the sealing performance of the sealing joint.

[0014] 3. The inner nut of the sealing joint is a detachable structure. The length and connection angle of the cable can be adjusted by loosening the inner nut slightly to reduce the sealing strength of the sealing element. The cable is sealed by the sealing element inside the sealing joint. There is no need for the inner nut to contact and seal the cable, which avoids damage to the cable, increases the service life of the cable, improves the cable use efficiency, reduces maintenance time, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model discloses a combined sealing joint structure schematic diagram for sealing the gap between the auxiliary lance tail of a converter and a cable.

[0016] Figure 2 The utility model is a top view of a combined sealing joint structure for sealing the rear of a converter auxiliary gun and a cable gap.

[0017] Figure 3 The utility model is a schematic diagram of the connection structure between the sealing joint and the auxiliary gun.

[0018] In the figure: 1- auxiliary gun probe; 2- cable; 3- auxiliary gun body; 4- cooling water inlet; 5- cooling water outlet;

[0019] 6-nitrogen inlet; 7-nitrogen pipe; 8-sealing joint; 9-bidirectional threaded joint; 10-internal nut; 11-sealing element; 12-internal threaded joint; 13-through hole; 14-wedge surface cavity; 15-threaded connection; 16-sealing gap. DETAILED DESCRIPTION

[0020] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings:

[0021] like Figure 1-Figure 3 As shown, the working principle of a combined sealing joint for sealing the gap between the tail of the converter auxiliary gun and the cable is as follows: the large diameter end of the stepped cylindrical two-way threaded joint 9 is connected to the internal nut 10, the internal nut 10 fully surrounds the end of the two-way threaded joint 9, and the other end is connected to the internal threaded joint 12, the internal threaded joint 12 is connected to the nitrogen pipe 7, the cable 2 passes through the center position of the combined sealing joint 8, and is connected to the auxiliary gun probe 1 through the nitrogen pipe 7, a sealing element 11 is arranged between the two-way threaded joint 9 and the internal nut 12, the cable 2 passes through the sealing element 11, the internal nut 10 and the two-way threaded joint 9 are tightened in cooperation with each other, the sealing gap 16 is squeezed, and the sealing element 11 is subjected to the two-way threaded joint 9 The sealing element 11 is elastically deformed due to the axial and radial extrusion of the inner nut 10. Since one side of the sealing element 11 is in the shape of a truncated cone, it is squeezed by the wedge surface of the surrounding wedge surface cavity 14, and the pressure is concentrated toward the center. The sealing element 11 is squeezed inward by the radial pressure and deformed to seal the space around the cable 2 at the center. The cylindrical end face on the other side of the sealing element 11 receives the pressure of the inner nut 10, and the sealing element 11 is subjected to axial pressure. The sealing element 11 is axially flattened, and the end of the two-way threaded joint 9 is sealed and blocked. The sealing performance is stronger, the leakage of high-pressure nitrogen is avoided, and the safety hazard caused by the overflow of high-pressure gas is avoided, the energy utilization efficiency is improved, and the production cost of converter steelmaking is reduced.

[0022] like Figure 1-Figure 3As shown, a combined sealing joint for sealing the gap between the tail of the converter auxiliary gun and the cable includes a two-way threaded joint 9, which is a stepped cylindrical joint. The large diameter end of the two-way threaded joint 9 is connected to the internal nut 10 by a thread 15, and the internal nut 10 and the two-way threaded joint 9 are in a fully wrapped connection relationship. The internal nut 10 completely covers the end of the two-way threaded joint 9 to improve the sealing performance of the sealing joint. The small diameter end of the two-way threaded joint 9 is connected to the internal threaded joint 12 by a thread 15. The two-way threaded joint 9 is provided with a truncated cone-shaped wedge cavity 14 at the large diameter end connected to the internal nut 10, and a sealing element 11 is arranged in the wedge cavity 14. The height of the sealing element 11 is greater than the height of the wedge cavity 14. A certain sealing gap 16 is left between the internal nut 10 and the two-way threaded joint 9 to facilitate squeezing the sealing element Part 11, when the inner nut 10 and the two-way threaded joint 9 are tightened, the pressure of the inner nut 10 on the two-way threaded joint 9 acts on the wedge surface of the wedge surface cavity 14, and the wedge surface applies an extrusion force obliquely upward in the center direction to the sealing element 11. While the inner nut 10 is fastened, a downward pressure is applied to the sealing element 11. The two forces act at the same time, and the sealing element 11 is subjected to axial pressure and radial pressure at the same time. Under the two-way pressure, the sealing element 11 deforms toward the center to seal the gap of the cable 2 at the center position, and the axial pressure causes the sealing element 11 to deform axially to seal the end of the two-way threaded joint 9. The axial center of the two-way threaded joint 9, the inner nut 10 and the sealing element 11 are all provided with a through hole 13 for the cable 2 to pass through. The diameter of the through hole 13 is larger than the diameter of the cable 2. The inner nut 10 does not contact and seal with the cable 2, so it does not damage the cable 2, thereby improving the service life of the cable 2.

[0023] Furthermore, the sealing element 11 is made of a sealing material having elastic deformation characteristics.

[0024] like Figure 1 As shown, further, the diameter of the through hole 13 is larger than the diameter of the cable 2, and the cable 2 is sealed by the sealing element 11, and the through hole 13 does not need to be sealed. Therefore, the diameter of the through hole 13 is larger than the diameter of the cable 2, and the through hole 13 does not contact the cable 2, and will not damage the cable 2 during use.

[0025] Furthermore, the internal threaded joint 12 is a steel pipe provided with internal threads.

[0026] like Figure 3As shown, further, the other end of the internal threaded connector 12 is connected to the nitrogen pipe 7, which is a three-way pipe, one end of which is connected to the auxiliary gun body 3, one end is connected to the sealing connector 8, and the other end is connected to the nitrogen inlet 6. The nitrogen pipe 7 is connected to the tail of the auxiliary gun body 3. The auxiliary gun body 3 has a cooling water inlet 4 and a cooling water outlet 5 to provide cooling water to provide cooling for the auxiliary gun probe 1 and the cable 2 in the auxiliary gun body 3. The cable 2 is connected to the auxiliary gun probe 1 through the auxiliary gun body 3 and enters the converter together with the auxiliary gun probe 1.

[0027] The above description is only a preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present utility model within the technical scope disclosed by the utility model, which should be covered by the protection scope of the present utility model.

Claims

1. A combined sealing joint for sealing the gap between the tail of the converter auxiliary gun and the cable, characterized in that: It comprises a two-way threaded joint, which is a stepped cylindrical joint. One end of the two-way threaded joint is connected to the internal nut by threads, and the other end of the two-way threaded joint is connected to the internal threaded joint by threads. The two-way threaded joint is provided with a wedge surface cavity at the end connected to the internal nut, and a sealing element is arranged in the wedge surface cavity. The height of the sealing element is greater than the height of the wedge surface cavity. The axial centers of the two-way threaded joint, the internal nut and the sealing element are all provided with through holes for the passage of cables.

2. A combined sealing joint for sealing the gap between the rear of the converter auxiliary lance and the cable according to claim 1, characterized in that: The sealing element is made of a sealing material with elastic deformation characteristics.

3. The combined sealing joint for sealing the gap between the rear of the converter auxiliary lance and the cable according to claim 1, characterized in that: The diameter of the through hole is larger than the diameter of the cable.

4. The combined sealing joint for sealing the gap between the rear of the converter auxiliary lance and the cable according to claim 1, characterized in that: The internal thread joint is a steel pipe with internal threads.

5. The combined sealing joint for sealing the gap between the rear of the converter auxiliary lance and the cable according to claim 1, characterized in that: The other end of the internal threaded joint is connected to a nitrogen pipe.

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