Device for quickly replacing sublance

Abstract

The utility model relates to a device for quickly replacing a sublance, which comprises a quick connector, a connecting sleeve and a copper head, the sublance is connected with a water pipe through the quick connector, the copper head is arranged inside the bottom end of the sublance and is connected with the sublance, the bottom end of the sublance is connected with the connecting sleeve, and the connecting sleeve is in threaded connection with the copper head. The utility model has the advantages that the structure is simple, the transformation cost is lower, the replacement time of the sublance is shortened, and the service life of the sublance is prolonged. The sublance is connected with the water pipe through the quick connector, the sublance is conveniently disconnected with the water inlet and outlet pipe, and the replacement time of the sublance is shortened. A sealing ring below the connecting sleeve is omitted, the connecting sleeve is directly connected and fixed to the copper head in the sublance in a threaded connection mode, it is guaranteed that the interior of the sublance does not leak water, the damage frequency of the connecting sleeve is reduced, then the overhaul and replacement frequency of the sublance is reduced, and the operation efficiency of the sublance is improved.

Description

Technical Field

[0001] This utility model belongs to the field of steelmaking, and in particular relates to a device for quickly changing a secondary gun. Background Technology

[0002] With the development of steelmaking equipment and technology, the auxiliary lance system is used for temperature measurement, sampling, and inspection of carbon and oxygen content in molten steel during the later stages of converter smelting. It also has the function of measuring the height of molten steel. The auxiliary lance is usually used twice to smelt one furnace of steel. The auxiliary lance replaces manual operation in converter smelting, which greatly improves work efficiency and increases safety. However, in the process of using the auxiliary lance, there are problems such as long replacement time and frequent water leakage in the internal seal of the auxiliary lance wall, which leads to the instability of the auxiliary lance.

[0003] See Figure 1 , Figure 2 The existing sub-lance has a service life of approximately 800 furnaces, which is relatively short and requires frequent replacement. The sub-lance has external lifting lugs for easy hoisting. From the inside out, the sub-lance consists of an inner tube, a middle tube, an outer tube, and a shell. The inner and middle tubes are connected to the water pipes. The water pipe connection is designed with an inlet flange at the top and a return flange at the bottom, both DN65, connected by eight M16 bolts. During sub-lance replacement, these eight bolts must be removed and reinstalled. Because the sub-lance body is 22949mm long, the working platform is 52.050m high, and the platform diameter is 1m, the upper flange bolts must be removed before the lower flange is removed, each removal taking approximately 15 minutes. The installation of the sub-lance flange bolts follows the same process, taking 15 minutes. Due to the small working platform and limited space, only one person can perform the dismantling and installation work, significantly reducing efficiency.

[0004] Furthermore, the auxiliary lance connecting sleeve is internally equipped with four water pipe sealing rings and one gas sealing ring. During use, because the auxiliary lance frequently comes into contact with high-temperature molten steel (two measurements per heat, one process measurement and one endpoint measurement), the water pipe sealing ring at the bottom of the auxiliary lance connecting sleeve is easily damaged due to the high temperature environment. Once water leaks inside the auxiliary lance, it often results in the auxiliary lance connection having no process or endpoint signals when connecting the probe, affecting the auxiliary lance's operating rate. When replacing the mating sleeve online, it is necessary to completely close the auxiliary lance's water inlet and outlet pipes, drain the residual water inside the auxiliary lance, and then replace it, which is time-consuming and labor-intensive. Summary of the Invention

[0005] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a device for quickly replacing the secondary gun, shortening the replacement time and improving the service life of the secondary gun.

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

[0007] A device for quickly changing a secondary gun includes a quick connector, a connecting sleeve, and a copper head. The secondary gun is connected to a water pipe via the quick connector. The copper head is located inside the bottom end of the secondary gun and is connected to the secondary gun. The bottom end of the secondary gun is connected to the connecting sleeve, and the connecting sleeve is threadedly connected to the copper head.

[0008] A sealing ring is provided between the connecting sleeve and the secondary gun.

[0009] Both the secondary gun and the water pipe are welded with external threaded sleeves.

[0010] The tail end of the connecting sleeve is connected to the probe.

[0011] The front end of the copper head is connected to the auxiliary gun by 2 to 3 sealing rings, and the rear end of the copper head is welded to the auxiliary gun.

[0012] The quick coupling is a lever-type quick coupling.

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

[0014] The quick-change device for the secondary nozzle has a simple structure, low modification cost, shortens the replacement time, and extends the service life of the secondary nozzle. The connection between the secondary nozzle and the water pipe uses a quick-connect coupling, facilitating easy disconnection from the inlet and outlet water pipes and reducing replacement time. The sealing ring under the connecting sleeve is eliminated; the connecting sleeve directly connects to the copper head via a threaded connection, ensuring no leakage inside the secondary nozzle, reducing the frequency of connecting sleeve damage, and consequently reducing the frequency of secondary nozzle maintenance and replacement, thus improving operational efficiency. Attached Figure Description

[0015] Figure 1 This is the front view of the original secondary weapon.

[0016] Figure 2 This is a top view of the original secondary weapon.

[0017] Figure 3 This is the front view of this utility model.

[0018] Figure 4 This is a top view of the present invention.

[0019] Figure 5 This is a schematic diagram showing the connection between the secondary gun and the copper head.

[0020] In the diagram: 1-Secondary gun; 2-Lifting lug; 3-Flange; 4-Middle tube; 5-Inner tube; 6-Outer tube; 7-Copper head; 8-Connecting sleeve; 9-Quick coupling. Detailed Implementation

[0021] The present utility model will be described in detail below in conjunction with the accompanying drawings of the specification. However, it should be noted that the implementation of the present utility model is not limited to the following embodiments.

[0022] See Figures 3-5 , a device for quickly replacing the sublance, which includes a quick joint 9, a copper head 7, and a connecting sleeve 8. The sublance 1 is connected to the water pipe through the quick joint 9. The copper head 7 is arranged inside the bottom end of the sublance 1 and is connected to the sublance 1. The bottom end of the sublance 1 is connected to the connecting sleeve 8, and the connecting sleeve 8 is threadedly connected to the copper head 7. The tail end of the connecting sleeve 8 is directly welded to the probe for measurement.

[0023] There is 1 sealing ring (gas seal) between the connecting sleeve 8 and the sublance 1, and this sealing ring is a rubber sealing ring. There are 2 - 3 sealing rings connected between the front end of the copper head 7 and the sublance 1, and the rear end of the copper head 7 is welded to the sublance 1. The sealing ring at the lower part of the original connecting sleeve 8 is cancelled to avoid damage of this sealing ring due to use in a high-temperature environment, thereby reducing the damage frequency of the connecting sleeve 8. The copper head 7 has internal threads, and the connecting sleeve 8 is provided with external threads that match the internal threads of the copper head 7. In this way, once the connecting sleeve 8 is damaged, it can be conveniently replaced in a timely manner.

[0024] External thread sleeves are welded on both the sublance 1 and the water pipe, and the quick joint 9 can be directly installed on the water pipe and the sublance 1 through the external thread sleeves. The quick joint 9 is a lever-type quick joint for convenient on-site operation.

[0025] During on-site renovation, external thread sleeves are welded on both sides between the inlet water pipe and the return water pipe and the sublance respectively, and lever-type quick joints 9 are installed on the upper parts of the external thread sleeves on both sides respectively. Then, the copper head 7 is installed inside the sublance 1, the connecting sleeve 8 is threadedly connected to the copper head 7, and a pressure test is carried out on the gun body. When the water pressure is 2.2 MPa and there is no water leakage for 20 minutes, it can be confirmed that the renovation is qualified.

[0026] The structure of the present utility model is simple, the renovation cost is relatively low, the replacement time of the sublance 1 is shortened, and the service life of the sublance 1 is increased. The connection method between the sublance 1 and the water pipe adopts the form of the quick joint 9, which is convenient for disconnecting the connection between the sublance 1 and the inlet and outlet water pipes, and shortens the replacement time of the sublance 1. The sealing ring below the connecting sleeve 8 is cancelled, and the connecting sleeve 8 is directly connected to the copper head 7 by a threaded connection method, ensuring no water leakage inside the sublance 1, reducing the damage frequency of the connecting sleeve 8, and further reducing the inspection and replacement frequency of the sublance 1, thereby improving the operation efficiency of the sublance 1.

Claims

1. A device for quickly changing a secondary weapon, characterized in that, It includes a quick connector, a connecting sleeve, and a copper head. The secondary gun is connected to the water pipe via the quick connector. The copper head is located inside the bottom of the secondary gun and is connected to the secondary gun. The bottom of the secondary gun is connected to the connecting sleeve, and the connecting sleeve is threadedly connected to the copper head.

2. The device for quickly changing a secondary weapon according to claim 1, characterized in that, A sealing ring is provided between the connecting sleeve and the secondary gun.

3. The device for quickly changing a secondary weapon according to claim 1, characterized in that, Both the secondary gun and the water pipe are welded with external threaded sleeves.

4. The device for quickly changing a secondary weapon according to claim 1, characterized in that, The tail end of the connecting sleeve is connected to the probe.

5. The device for quickly changing a secondary weapon according to claim 1, characterized in that, The front end of the copper head is connected to the auxiliary gun by 2 to 3 sealing rings, and the rear end of the copper head is welded to the auxiliary gun.

6. The device for quickly changing a secondary weapon according to claim 1, characterized in that, The quick coupling is a lever-type quick coupling.

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