Oxygen lance nozzle pressure test device

Abstract

The utility model relates to an oxygen lance nozzle pressure testing device which comprises a sealing outer sleeve and a sealing inner seal, the sealing outer sleeve and the sealing inner seal are of a concentric sleeve structure, a limiting rib is arranged between the sealing outer sleeve and the sealing inner seal for fixing, one end of the sealing outer sleeve and one end of the sealing inner seal are provided with a plugging plate for plugging, and the other end of the sealing outer sleeve is provided with a sealing plate. An annular groove is formed in the sealing plate and connected with the end of the nozzle outer pipe in a matched mode, and a first sealing ring is arranged between the annular groove and the nozzle outer pipe for blocking and sealing. The pressure testing device has the advantages that the pressure testing device is simple in structure, on the basis that the sealing performance in the pressure testing process is guaranteed, tedious pressure testing operation is simplified, the pressure testing efficiency is improved, and the pressure testing efficiency is improved. The usage amount of rubber materials is reduced, the pressure test efficiency is improved, and the pressure test accuracy is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of steelmaking oxygen lance nozzle pressure testing, in particular to an oxygen lance nozzle pressure testing device. Background Art

[0002] The welding tightness and casting defects of the oxygen lance nozzle require water pressure test. The water pressure test is a necessary pressure test before leaving the factory and is also one of the standards for testing the quality of the nozzle. At present, the water pressure test device of the oxygen lance nozzle is prone to displacement during the pressure test, resulting in pressure release of the pressure test equipment. The pressure test device is not well sealed and cannot guarantee the pressure of the water pressure test. The pressure test result is poor and the test data is inaccurate. The Chinese utility model patent with authorization announcement number CN209878224U discloses "an oxygen lance nozzle pressure test tooling", including a lower tooling and an upper tooling. The manufacturing process of the pressure test tooling is complicated, and the upper and lower tools are inconvenient to operate. During the pressure test, the upper and lower tools are prone to displacement from each other, resulting in pressure leakage in the test cavity of the upper and lower combination, and it is impossible to detect whether the oxygen lance nozzle has casting defects or welding defects, which affects the test results of the oxygen lance nozzle and the work efficiency of the oxygen lance nozzle detection. Summary of the invention

[0003] In order to solve the technical problem of difficulty in pressure testing an oxygen lance nozzle, the utility model provides an oxygen lance nozzle pressure testing device, which is assembled by the sleeve-type pressure testing device, the outer tube, the middle tube and the sealing connecting pipe of the oxygen lance nozzle, and is sealed by the first sealing ring and the second sealing ring, so that the inner cavity of the pressure testing device becomes a closed test cavity. After the cavity is filled with pressurized test water, the water pressure change is observed to judge whether there are casting and welding defects in the nozzle. The pressure testing device has a simple structure. On the basis of ensuring the sealing during the pressure testing process, it simplifies the cumbersome pressure testing operation, reduces the use of rubber materials, improves the pressure testing efficiency, and ensures the accuracy of the pressure testing.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An oxygen lance nozzle pressure test device comprises a sealing outer sleeve and a sealing inner seal, wherein the sealing outer sleeve and the sealing inner seal are of a concentric sleeve structure, a limiting rib is arranged between the sealing outer sleeve and the sealing inner seal for fixing, a sealing plate is arranged at one end of the sealing outer sleeve and the sealing inner seal for sealing, a sealing plate is arranged at the other end of the sealing outer sleeve, an annular groove is arranged on the sealing plate, the annular groove is connected with the end of the nozzle outer tube in cooperation, a first sealing ring is arranged between the annular groove and the nozzle outer tube for sealing; the sealing outer sleeve is inserted into the nozzle middle tube in cooperation, the sealing inner seal is inserted into the sealing connecting pipe of the nozzle in cooperation, and a second sealing ring is arranged between the sealing inner seal and the sealing connecting pipe for sealing.

[0006] Furthermore, the oxygen lance nozzle pressure testing device also includes a water inlet pipe and a water outlet pipe, wherein the water inlet pipe is arranged on one side of the sealing jacket, and the water outlet pipe is arranged on the other side of the sealing jacket.

[0007] Furthermore, a pressure meter is provided on the water inlet pipe.

[0008] Furthermore, the water outlet pipe is provided with a ball valve.

[0009] Furthermore, an operating handle is arranged outside the sealing outer sleeve.

[0010] Furthermore, a gap is left between the sealing sleeve and the nozzle middle tube.

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

[0012] 1. The pressure test device of the present invention does not require temporary welding during the pressure test process, which greatly shortens the pressure test time and improves the pressure test efficiency. The pressure test device is an integral structure with a simple structure, which eliminates the problem of pressure release caused by displacement of the pressure test device. The pressure test process is easy to operate and the pressure test result is highly accurate.

[0013] 2. The pressure test device adopts double sealing of the first sealing ring and the second sealing ring, with less sealing rubber consumption and high sealing degree. The pressure test device can detect the sealing condition of the sealing pipe and the second sealing ring after matching, and better understand the sealing status of the actual application of the oxygen lance nozzle.

[0014] 3. The sealing outer sleeve and the sealing inner seal of the pressure test device are connected with the nozzle middle pipe and the sealing pipe of the oxygen lance nozzle, which better restores the actual matching situation after the inner and outer pipes of the oxygen lance are connected, making the pressure test data more reliable and the test results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the connection structure of an oxygen lance nozzle pressure test device and an oxygen lance nozzle.

[0016] Figure 2 The utility model is a schematic diagram of the structure of an oxygen lance nozzle pressure test device.

[0017] Figure 3 This is a bottom view of the oxygen lance nozzle pressure test device structure provided by the utility model

[0018] In the figure: 1-first sealing ring; 2-sealing plate; 3-sealing outer sleeve; 4-drain pipe; 5-sealing plate; 6-sealing inner seal;

[0019] 7-limiting rib; 8-water inlet pipe; 9-pressure test device cavity; 10-operating handle; 11-sprinkler outer tube; 12-sprinkler middle tube; 13-sealing connecting pipe; 14-second sealing ring. 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 an oxygen lance nozzle pressure test device is as follows: the sealing pipe 13 of the oxygen lance nozzle is inserted into the sealing inner seal 6 of the pressure test device, the nozzle middle pipe 12 of the oxygen lance nozzle is inserted into the sealing outer sleeve 3 of the pressure test device, the end of the nozzle outer pipe 11 is arranged in the annular groove of the sealing plate 5 of the pressure test device, the first sealing ring 1 and the second sealing ring 14 seal the pressure test device cavity 9 between the oxygen lance nozzle and the pressure test device, the oxygen lance nozzle is completely inserted into the pressure test device cavity 9, and then the test water is introduced through the water inlet pipe 8, the ball valve of the water outlet pipe 4 is closed and pressurized, so that a working chamber for water pressure test is formed in the pressure test device cavity 9, when the water pressure reaches the nozzle test pressure, the water supply is stopped, the pressure is maintained for a period of time, and the pressure change is observed to know whether the nozzle contains casting defects and welding defects. The test process is simple and easy to operate, and the test data is highly accurate.

[0022] like Figure 1-Figure 3 As shown, an oxygen lance nozzle pressure test device comprises a sealing outer sleeve 3 and a sealing inner seal 6, wherein the sealing outer sleeve 3 and the sealing inner seal 6 are of a concentric sleeve structure, a limiting rib 7 is arranged between the sealing outer sleeve 3 and the sealing inner seal 6 for fixing, the limiting rib 7 is arranged in the concentric circular ring space between the sealing outer sleeve 3 and the sealing inner seal 6, six rectangular rib plates are evenly distributed on the circumference and welded on the inner circle of the sealing outer sleeve 3 and the outer circle of the sealing inner seal 6, a sealing plate 5 is arranged at one end of the sealing outer sleeve 3 and the sealing inner seal 6 for sealing, the sealing plate 5 is an annular circular ring plate, which is arranged at the end between the sealing outer sleeve 3 and the sealing inner seal 6 to seal the circular ring space at the end of the sealing outer sleeve 3 and the sealing inner seal 6, and the sealing outer A sealing plate 2 is arranged at the other end of the sleeve 3, and an annular groove is arranged on the sealing plate 2. The annular groove is connected with the end of the nozzle outer tube 11, and a first sealing ring seal 1 is arranged between the annular groove and the nozzle outer tube 11; the nozzle middle tube 12 is inserted into the sealing outer sleeve 3, and the sealing connecting pipe 13 of the nozzle is inserted into the sealing inner seal 6, and a second sealing ring 14 is arranged between the sealing inner seal 6 and the sealing connecting pipe 13 for sealing. The first sealing ring 1 and the second sealing ring 14 seal the internal space of the pressure test device and the oxygen gun nozzle from the head and tail sides of the pressure test device to seal a closed pressure test device cavity 9, and the pressure test device cavity 9 is a pressure chamber for water pressure testing.

[0023] like Figure 1-Figure 2 As shown, further, the oxygen lance nozzle pressure test device also includes a water inlet pipe 8 and a water outlet pipe 4, wherein the water inlet pipe 8 is arranged on one side of the sealing jacket 3, and the water outlet pipe 4 is arranged on the other side of the sealing jacket 3.

[0024] Furthermore, a pressure meter is provided on the water inlet pipe 8, and the pressure meter observes the water pressure change in the cavity 9 of the pressure test device to judge the casting quality and welding quality of the oxygen lance nozzle.

[0025] Furthermore, the water outlet pipe 4 is provided with a ball valve. During the water pressure test, the ball valve is closed, water continues to flow into the pressure test device cavity 9, and the water pressure gradually increases; after the water pressure test is completed, the ball valve is opened, the water in the pressure test device is released, and then the nozzle is taken out of the pressure test device.

[0026] like Figure 3 As shown, further, an operating handle 10 is provided outside the sealing jacket 3 .

[0027] like Figure 1-Figure 2 As shown, further, a gap is left between the sealing sleeve 3 and the nozzle middle tube 12, and the gap allows test water to enter between the nozzle outer tube 11 and the nozzle middle tube 12 to detect the casting quality of the nozzle outer tube 11 and the welding quality of the nozzle outer tube 11.

[0028] 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. An oxygen lance nozzle pressure test device, characterized in that: It includes a sealing outer sleeve and a sealing inner seal, which are concentric sleeve structures, and a limiting rib is arranged between the sealing outer sleeve and the sealing inner seal for fixing, a sealing plate is arranged at one end of the sealing outer sleeve and the sealing inner seal for sealing, and a sealing plate is arranged at the other end of the sealing outer sleeve, and an annular groove is arranged on the sealing plate, and the annular groove is connected with the end of the outer tube of the nozzle, and a first sealing ring is arranged between the annular groove and the outer tube of the nozzle for sealing; the sealing outer sleeve is inserted into the nozzle middle tube, and the sealing inner seal is inserted into the sealing connecting pipe of the nozzle, and a second sealing ring is arranged between the sealing inner seal and the sealing connecting pipe for sealing.

2. The oxygen lance nozzle pressure test device according to claim 1, characterized in that: The oxygen lance nozzle pressure testing device further comprises a water inlet pipe and a water outlet pipe. The water inlet pipe is arranged on one side of the sealing jacket, and the water outlet pipe is arranged on the other side of the sealing jacket.

3. The oxygen lance nozzle pressure test device according to claim 2, characterized in that: A pressure meter is arranged on the water inlet pipe.

4. The oxygen lance nozzle pressure test device according to claim 2, characterized in that: The water outlet pipe is provided with a ball valve.

5. The oxygen lance nozzle pressure test device according to claim 1, characterized in that: An operating handle is arranged outside the sealing outer sleeve.

6. The oxygen lance nozzle pressure test device according to claim 1, characterized in that: A gap is left between the sealing jacket and the nozzle middle pipe.

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