Device for testing high-temperature sealing performance of refractory sealing material

Abstract

The utility model discloses a high-temperature sealing performance testing device for a refractory sealing material. The high-temperature sealing performance testing device comprises an upper mold, a lower mold, a heating device, a temperature measuring unit, a water cooling unit, a vacuumizing unit, a vacuum monitoring unit and a controller, the heating device is arranged on the outer side of the lower mold and is close to but not in contact with the outer wall of the lower mold; a cavity is formed in the top of the lower mold, a refractory sealing material is designed according to the shapes and sizes of the upper mold and the lower mold, a sample meeting requirements is manufactured and installed on the periphery of the inner wall of the middle of the cavity of the lower mold, the upper mold is inserted into the cavity, and the lower portion of the side wall of the upper mold compacts the refractory sealing material; a sealed test cavity is formed among the compacted refractory sealing material, the upper mold and the bottom of the concave cavity; the device is simple in structure and scientific in design, the sealing effect of the fireproof sealing material at different temperatures can be effectively tested in the whole process through the device, the testing process can be monitored in real time, convenience and effectiveness are achieved, and a large amount of testing data can be rapidly obtained through a single experiment.

Description

Technical Field

[0001] The utility model relates to the technical field of refractory material performance testing, in particular to a device for testing the high-temperature sealing performance of refractory sealing materials. Background Art

[0002] During the continuous casting process, when molten steel flows from the ladle into the tundish through the long nozzle or from the tundish into the crystallizer through the submerged nozzle, the air outside the nozzle tends to enter the molten steel through the nozzle wall and the nozzle connection due to the negative pressure generated by the flow of molten steel. The air entering the molten steel through the nozzle or the nozzle connection is an important reason for reducing the quality of the casting and causing nozzle blockage. The oxygen entering the molten steel reacts with the alloy elements such as aluminum in the steel to generate corresponding oxide inclusions that enter the steel, which also reduces the quality of the steel.

[0003] Under the current smelting and casting process, the commonly used solution in the market is to install refractory sealing materials (gaskets) between different nozzles to achieve sealing protection. However, the refractory sealing gaskets currently used in the market have problems such as uneven quality, poor stability, and unstable sealing effect. However, due to the lack of effective evaluation and testing equipment, it is impossible to conduct scientific and effective evaluation and testing of related products, which has a huge impact on the quality and benefits of steel production. Utility Model Content

[0004] The utility model aims to provide a device for testing the high-temperature sealing performance of a fire-resistant sealing material.

[0005] The innovation of the utility model lies in that the application has a simple structure and can effectively test the sealing effect of refractory sealing materials at different temperatures throughout the whole process. The test process can be monitored in real time, which is convenient and effective, and a large amount of test data can be quickly obtained in a single experiment.

[0006] In order to achieve the above utility model purpose, the technical solution of the utility model is:

[0007] A device for testing the high-temperature sealing performance of a refractory sealing material, comprising an upper mold, a lower mold, a heating device, a temperature measuring unit, a water cooling unit, a vacuum unit, a vacuum monitoring unit and a controller; the heating device is arranged on the outside of the lower mold, close to but not in contact with the outer wall of the lower mold; a concave cavity is arranged on the top of the lower mold, and the refractory sealing material is designed according to the shape and size of the upper mold and the lower mold, and a sample that meets the requirements is made and installed on the inner wall circle of the middle part of the concave cavity of the lower mold, the upper mold is inserted into the concave cavity, and the sample is compacted by the lower side wall of the upper mold, and after compaction, a sealing test cavity is formed between the sample, the upper mold and the bottom of the concave cavity; the vacuum unit It includes a vacuum pump, an exhaust pipe and a one-way valve arranged on the exhaust pipe; one end of the exhaust pipe is connected to the sealing test cavity, and the other end is connected to the vacuum pump after passing through the lower mold; the temperature measuring unit includes a non-contact temperature measuring device and a contact temperature measuring device, the non-contact temperature measuring device is arranged outside the lower mold, outside the corresponding area of ​​the sample; the temperature measuring end of the contact temperature measuring device is inserted into the lower mold and close to the sample; the vacuum monitoring unit includes a negative pressure gauge, a monitoring channel is opened in the upper mold and runs through its body, the lower end of the monitoring channel is connected to the sealing test cavity, and the negative pressure gauge is sealed and connected to the upper end of the monitoring channel.

[0008] Furthermore, the water cooling unit includes an upper cooling coil arranged inside the upper mold and a lower cooling coil arranged inside the lower mold.

[0009] Furthermore, a counterweight block is provided on the top of the upper mold.

[0010] The beneficial effects of the utility model are:

[0011] The device has a simple structure and a scientific design. The device can be used to effectively test the sealing effect of refractory sealing materials at different temperatures throughout the entire process. The test process can be monitored in real time, which is convenient and effective. A large amount of test data can be quickly obtained in a single experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] In the figure: 10 is an upper mold, 11 is a monitoring channel, 20 is a lower mold, 21 is a concave cavity, 22 is a sealing test cavity, 30 is a heating device, 40 is a temperature measuring unit, 41 is a non-contact temperature measuring device, 42 is a contact temperature measuring device, 50 is a water cooling unit, 51 is an upper cooling coil, 52 is a lower cooling coil, 60 is a vacuum unit, 61 is a vacuum pump, 62 is an exhaust pipe, 63 is a one-way valve, 70 is a vacuum monitoring unit, 80 is a controller, 90 is a sample, and 100 is a counterweight. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings.

[0015] A device for testing the high-temperature sealing performance of a refractory sealing material comprises an upper mold 10, a lower mold 20, a heating device 30, a temperature measuring unit 40, a water cooling unit 50, a vacuum unit 60, a vacuum monitoring unit 70 and a controller 80; the heating device 30 is arranged on the outside of the lower mold 20, close to but not in contact with the outer wall of the lower mold 20; a concave cavity 21 is arranged on the top of the lower mold 20, and the refractory sealing material is designed according to the shape and size of the upper mold 10 and the lower mold 20, and a sample 90 that meets the requirements is made and then installed on the inner wall circle of the middle part of the concave cavity 21 of the lower mold 20, the upper mold 10 is inserted into the concave cavity 21 and the lower part of the side wall of the upper mold 10 is compacted to compact the sample 90, and after compaction, a sealing test cavity 22 is formed between the sample 90, the upper mold 10 and the bottom of the concave cavity 21; the vacuum unit 80 is used to test the high-temperature sealing performance of a refractory sealing material, and the upper mold 1 ... The unit 60 includes a vacuum pump 61, an exhaust pipe 62 and a one-way valve 63 arranged on the exhaust pipe 62; one end of the exhaust pipe 62 is connected to the sealing test chamber 22, and the other end passes through the lower mold 20 and is connected to the vacuum pump 61; the temperature measuring unit 40 includes a non-contact temperature measuring device 41 and a contact temperature measuring device 42, the non-contact temperature measuring device 41 is arranged outside the lower mold 20, located outside the corresponding area of ​​the sample 90; the temperature measuring end of the contact temperature measuring device 42 is inserted into the lower mold 20 and close to the sample 90; the vacuum monitoring unit 70 includes a negative pressure gauge, and a monitoring channel 11 is opened in the upper mold 10 and runs through its body, the lower end of the monitoring channel 11 is connected to the sealing test chamber 22, and the negative pressure gauge is sealed and connected to the upper end of the monitoring channel 11.

[0016] Furthermore, the upper mold 10 and the lower mold 20 are both made of metal.

[0017] Furthermore, the heating device 30 is an induction heating coil, and of course it can also be other heating devices.

[0018] Furthermore, the non-contact temperature measuring device 41 is an infrared temperature measuring device; when measuring temperature, the temperature measuring point passes through the gap between the induction heating coils and is aligned with the corresponding area of ​​the sample 90.

[0019] Furthermore, the contact temperature measuring device 42 may be an armored thermocouple.

[0020] Furthermore, the heating device 30, the temperature measuring unit 40, the water cooling unit 50, the vacuum unit 60, and the vacuum monitoring unit 70 are all connected to the controller 80. The controller 80 is a prior art and will not be described in detail here.

[0021] Furthermore, the exhaust pipe 62 is installed to ensure sealing between the exhaust pipe 62 and the lower mold 20 .

[0022] Furthermore, the water cooling unit 50 includes an upper cooling coil 51 disposed inside the upper mold 10 and a lower cooling coil 52 disposed inside the lower mold 20 .

[0023] Furthermore, a counterweight block 100 is disposed on the top of the upper mold 10 . The counterweight block 100 can ensure that the upper mold 10 can completely compact the sample 90 .

[0024] How this application works:

[0025] The controller 80 controls the heating device 30 to turn on to heat the lower mold 20, and then the sample 90 attached to the inner wall of the concave cavity 21 of the lower mold 20 is heated up. The non-contact temperature measuring device 41 and the contact temperature measuring device 42 monitor the temperature of the sample 90 in real time, and feed back the monitored temperature value to the controller 80; when the temperature reaches the set value, the controller 80 controls the vacuum pump 61 and the one-way valve 63 to turn on the sealing test chamber 22 to vacuum, and at the same time, the vacuum monitoring unit 70 monitors the negative pressure value (sealing) inside the sealing test chamber 22 in real time, and feeds back the monitoring value to the controller 80; the controller 80 controls the heating device 30 to make the sample 90 in different temperature test sections, and the vacuum monitoring unit 70 monitors the negative pressure value in the sealing test chamber 22 in different temperature test sections to form the sealing performance test result of the sample 90.

[0026] The described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A device for testing the high temperature sealing performance of a refractory sealing material, characterized in that: It comprises an upper mold (10), a lower mold (20), a heating device (30), a temperature measuring unit (40), a water cooling unit (50), a vacuum unit (60), a vacuum monitoring unit (70) and a controller (80); The heating device (30) is arranged outside the lower mold (20) and is close to but not in contact with the outer wall of the lower mold (20); A concave cavity (21) is provided at the top of the lower mold (20); a refractory sealing material is designed according to the shape and size of the upper mold (10) and the lower mold (20); a sample (90) that meets the requirements is made and installed on the inner wall circumference of the middle of the concave cavity (21); the upper mold (10) is inserted into the concave cavity (21) and the lower part of the side wall of the upper mold (10) compacts the sample (90); after compaction, a sealed test cavity (22) is formed between the sample (90), the upper mold (10) and the bottom of the concave cavity (21); The vacuum unit (60) comprises a vacuum pump (61), an air extraction pipe (62), and a one-way valve (63) arranged on the air extraction pipe (62); one end of the air extraction pipe (62) is connected to the sealing test chamber (22), and the other end passes through the lower mold (20) and is connected to the vacuum pump (61); The temperature measuring unit (40) comprises a non-contact temperature measuring device (41) and a contact temperature measuring device (42); the non-contact temperature measuring device (41) is arranged outside the lower mold (20) and outside the corresponding area of ​​the sample (90); the temperature measuring end of the contact temperature measuring device (42) is inserted into the lower mold (20) and is close to the sample (90); The vacuum monitoring unit (70) comprises a negative pressure gauge, the upper mold (10) is provided with a monitoring channel (11) penetrating the upper mold body, the lower end of the monitoring channel (11) is connected to the sealing test cavity (22), and the negative pressure gauge is sealed to the upper end of the monitoring channel (11).

2. A refractory sealing material high temperature sealing performance testing device according to claim 1, characterized in that: The water cooling unit (50) comprises an upper cooling coil (51) arranged inside the upper mold (10) and a lower cooling coil (52) arranged inside the lower mold (20).

3. A device for testing high temperature sealing performance of refractory sealing materials according to claim 1, characterized in that: A counterweight block (100) is also provided on the top of the upper mold (10).

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