A cylinder lifting atmospheric furnace sealing device for creep test and cylinder atmospheric furnace

Abstract

The application provides a cylinder type lifting atmospheric furnace sealing device for creep test and a cylinder type atmospheric furnace, which comprises an upper sealing assembly and a lower sealing assembly; the upper sealing assembly comprises a first high-temperature-resistant sealing piece and a first fixing piece, and the first fixing piece abuts the first high-temperature-resistant sealing piece against the top surface of the cylinder type atmospheric furnace; the lower sealing assembly comprises a second high-temperature-resistant sealing piece and a second fixing piece, the second high-temperature-resistant sealing piece comprises a first high-temperature-resistant sealing block and a second high-temperature-resistant sealing block, the second high-temperature-resistant sealing piece is configured to be sleeved on a lower pull rod and a creep extensometer which can slide, and the second fixing piece fixes the first high-temperature-resistant sealing block and the second high-temperature-resistant sealing block on the bottom surface of the cylinder type atmospheric furnace. The device can reduce the radiation heat dissipation and conduction heat dissipation of the cylinder type atmospheric furnace, avoid sealing failure caused by axial stretching and air flow disturbance during the test, ensure the uniformity of the temperature field in the furnace during the test, reduce energy consumption and burning loss of the test machine, and improve the test quality and efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of metal testing equipment, specifically relating to a cylindrical lifting atmospheric furnace sealing device and a cylindrical atmospheric furnace for creep testing. Background Technology

[0002] High-temperature creep refers to the phenomenon where a material slowly undergoes plastic deformation over time at a temperature T ≥ 0.3Tm (Tm is the melting point) and a stress below its yield strength. High-temperature creep is a more effective predictor of a material's strain trend and fracture life under long-term use at high temperatures than high-temperature endurance strength, and is one of the important mechanical properties of materials.

[0003] In prolonged high-temperature creep tests, the upper opening of the cylindrical lifting atmospheric furnace is typically sealed with aluminosilicate cotton. However, the furnace needs to be raised and lowered before and after testing, resulting in a large gap between the upper opening and the pull rod on the testing machine during sealing. Due to the positional relationship between the creep extensometer and the pull rod, and the need for repositioning the furnace before and after testing, the lower opening is often not effectively sealed. Consequently, the aluminosilicate cotton used to seal the upper opening frequently comes loose during testing due to the movement of the pull rod, and the lower opening cannot be sealed, leading to significant temperature fluctuations in the atmospheric furnace during testing. This affects the accuracy of the creep test and the lifespan of the equipment, making it difficult to meet the requirements of prolonged high-temperature creep testing. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art, and provides a cylindrical lifting atmospheric furnace sealing device and a cylindrical atmospheric furnace for creep testing.

[0005] This invention provides a cylindrical lifting atmospheric furnace sealing device for creep testing, comprising an upper sealing assembly and a lower sealing assembly; The upper sealing assembly includes: a first high-temperature resistant sealing member and a first fixing member. The first high-temperature resistant sealing member is configured to be disposed on the top surface of the cylindrical atmospheric furnace. The first high-temperature resistant sealing member has a first columnar space. The first high-temperature resistant sealing member is configured to be sleeved on the upper pull rod of the cylindrical atmospheric furnace through the first columnar space. The first fixing member abuts against the side of the first high-temperature resistant sealing member away from the top surface of the cylindrical atmospheric furnace. The first fixing member is configured to be fixed to the upper pull rod. The lower sealing assembly includes: a second high-temperature resistant sealing component and a second fixing component. The second high-temperature resistant sealing component includes a first high-temperature resistant sealing block and a second high-temperature resistant sealing block. The first high-temperature resistant sealing block and the second high-temperature resistant sealing block form an accommodating space. The second high-temperature resistant sealing component is configured to be sleeved on the pull rod and creep extensometer of the slidable cylindrical atmospheric furnace through the accommodating space. The second fixing component is configured to fix the second high-temperature resistant sealing component to the bottom surface of the cylindrical atmospheric furnace.

[0006] In some embodiments of the present invention, the first high-temperature resistant sealing member is an annular structure, and the inner ring of the first high-temperature resistant sealing member is adapted to the upper pull rod.

[0007] In some embodiments of the present invention, the first fixing member includes a first half-clamping ring, a second half-clamping ring, and a locking pin. The first half-clamping ring and the second half-clamping ring are connected by the locking pin, and the first half-clamping ring and the second half-clamping ring form an annular structure that is tightly connected to the upper pull rod.

[0008] In some embodiments of the present invention, the first high-temperature resistant sealing component is a high-alumina brick.

[0009] In some embodiments of the present invention, the first high-temperature resistant sealing block is a "U"-shaped block, the opening direction of the "U"-shaped block is perpendicular to the thickness direction of the second high-temperature resistant sealing member, and the second high-temperature resistant sealing block seals the opening of the "U"-shaped block and forms an accommodating space through the thickness direction of the second high-temperature resistant sealing member with the "U"-shaped block.

[0010] In some embodiments of the present invention, the accommodating space is elongated in cross-section perpendicular to the thickness direction of the second high-temperature resistant sealing member.

[0011] In some embodiments of the present invention, the second fixing member includes two spaced-apart "U"-shaped frames, the open ends of the two "U"-shaped frames are respectively configured to connect to the bottom surface of the cylindrical atmospheric furnace, the two "U"-shaped frames are respectively located at the open end and the bottom end of the "U"-shaped block, the accommodating space is located between the two "U"-shaped frames, and the shape of the "U"-shaped frames is adapted to the shape of the second high-temperature resistant sealing member.

[0012] In some embodiments of the present invention, the lower sealing assembly further includes a fixing plate, which is configured to be connected to the bottom surface of the cylindrical atmospheric furnace, and the fixing plate is correspondingly connected to the opening end of each of the "U"-shaped frames.

[0013] In some embodiments of the present invention, both the first high-temperature resistant sealing block and the second high-temperature resistant sealing block are high-alumina bricks.

[0014] This invention provides a cylindrical atmospheric furnace, which includes a furnace body arranged opposite to each other and a cylindrical lifting atmospheric furnace sealing device for creep testing. The cylindrical lifting atmospheric furnace sealing device for creep testing includes an upper sealing component and a lower sealing component. The upper sealing component is disposed on the top surface of the furnace body, and the lower sealing component is disposed on the bottom surface of the furnace body. The cylindrical lifting atmospheric furnace sealing device for creep testing is the cylindrical lifting atmospheric furnace sealing device for creep testing according to any of the above embodiments.

[0015] The cylindrical lifting atmospheric furnace sealing device and cylindrical atmospheric furnace for creep testing according to embodiments of the present invention, through the cooperation of the first high-temperature resistant sealing member and the first fixing member of the upper sealing assembly, allow the first high-temperature resistant sealing member to be fitted onto the upper pull rod of the cylindrical atmospheric furnace, thereby achieving a seal on the top of the cylindrical atmospheric furnace; through the cooperation of the second high-temperature resistant sealing member and the second fixing member of the lower sealing assembly, allow the second high-temperature resistant sealing member to be fitted onto the lower pull rod of the cylindrical atmospheric furnace, thereby achieving a seal on the bottom of the cylindrical atmospheric furnace. The device of this application reduces radiative and conductive heat dissipation at the opening of the cylindrical atmospheric furnace while avoiding sealing failure during testing due to axial tension and airflow disturbance, ensuring a uniform temperature field inside the cylindrical atmospheric furnace during high-temperature creep axial tension or compression testing. This effectively reduces energy consumption and burn-out of testing equipment, improving the test quality and efficiency of high-temperature creep testing. Furthermore, the device of this application also has advantages such as low cost, interchangeable and universal components, and convenient operation, making it suitable for large-scale high-temperature creep axial tension or compression testing and possessing broad application prospects. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the cylindrical atmospheric furnace of the present invention; Figure 2 for Figure 1 The diagram shows the upper sealing component structure of the cylindrical lifting atmospheric furnace sealing device used for creep testing. Figure 3 for Figure 1 The diagram shows the structure of the first fastener. Figure 4 for Figure 1 The diagram shows the lower sealing assembly of the cylindrical lifting atmospheric furnace sealing device used for creep testing. Figure 5 for Figure 1 The diagram shows the structure of the second high-temperature resistant sealing component.

[0017] The labels in the attached diagram are as follows: 100. A cylindrical lifting atmospheric furnace sealing device for creep testing; 10. Upper sealing assembly; 11. First high-temperature resistant sealing component; 12. First fixing component; 121. First half-ring; 122. Second half-ring; 123. Locking pin; 20. Lower sealing assembly; 21. Second high-temperature resistant sealing component; 211. First high-temperature resistant sealing block; 212. Second high-temperature resistant sealing block; 22. Second fixing component; 221. "U" shaped frame; 23. Fixing plate; 200. Cylindrical atmospheric furnace; 210. Furnace body; 220. Top surface; 230. Bottom surface; 240. Upper pull rod; 250. Lower pull rod; 260. Creep extensometer. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the invention. The described embodiments are some, but not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0019] like Figures 1 to 5 As shown, this embodiment of the invention provides a cylindrical lifting atmospheric furnace sealing device 100 for creep testing, including an upper sealing assembly 10 and a lower sealing assembly 20; The upper sealing assembly 10 includes: a first high-temperature resistant sealing member 11 and a first fixing member 12. The first high-temperature resistant sealing member 11 is configured to be disposed on the top surface of the cylindrical atmospheric furnace 200 and cover the upper opening. The first high-temperature resistant sealing member has a first columnar space. The first high-temperature resistant sealing member 11 is configured to be sleeved on the upper pull rod 240 of the cylindrical atmospheric furnace 200 through the first columnar space. The first fixing member 12 abuts against the side of the first high-temperature resistant sealing member 11 away from the top surface of the cylindrical atmospheric furnace 200. The first fixing member 12 is configured to be sleeved on the upper pull rod 240 of the cylindrical atmospheric furnace 200. The lower sealing assembly 20 includes a second high-temperature resistant sealing element 21 and a second fixing element 22. The second high-temperature resistant sealing element 21 includes a first high-temperature resistant sealing block 211 and a second high-temperature resistant sealing block 212. The first high-temperature resistant sealing block 211 and the second high-temperature resistant sealing block 212 form an accommodating space. The second high-temperature resistant sealing element 21 is configured to be sleeved on the pull rod 250 and creep extensometer 260 of the slidable cylindrical atmospheric furnace 200 through the accommodating space. The second fixing element 22 is configured to be fixedly connected to the bottom surface 230 of the cylindrical atmospheric furnace 200. The second fixing element 22 fixes the second high-temperature resistant sealing element 21 to the bottom surface 230 of the cylindrical atmospheric furnace 200.

[0020] Specifically, the cylindrical lifting atmospheric furnace sealing device 100 for creep testing includes an upper sealing component 10 and a lower sealing component 20. The upper sealing component 10 is located at the top of the cylindrical atmospheric furnace 200 and seals the upper opening of the cylindrical atmospheric furnace 200. The lower sealing component 20 is located at the bottom of the cylindrical atmospheric furnace 200 and seals the lower opening of the cylindrical atmospheric furnace 200. The lower sealing component 20 seals the lower opening of the cylindrical atmospheric furnace 200. In other words, the upper sealing component 10 and the lower sealing component 20 work together to seal both the upper and lower ends of the cylindrical atmospheric furnace 200, thereby improving the sealing performance of the cylindrical atmospheric furnace 200.

[0021] like Figure 1 , Figure 2 As shown, the upper sealing assembly 10 includes a first high-temperature resistant sealing element 11, which is fixed to the top surface 220 of the cylindrical atmospheric furnace 200. The first high-temperature resistant sealing element 11 has a first columnar space, which is sleeved on the upper pull rod 240. The first columnar space of the first high-temperature resistant sealing element 11 matches the shape and size of the upper pull rod 240 to ensure the sealing performance of the first high-temperature resistant sealing element 11 and prevent high-temperature gas from leaking between the first high-temperature resistant sealing element 11 and the upper pull rod 240. The upper sealing assembly 10 also includes a first fixing member 12. When the upper sealing assembly 10 is installed on the top surface of the cylindrical atmospheric furnace 200, the opposite sides of the first high-temperature resistant sealing member 11 are in contact with the top surface of the cylindrical atmospheric furnace 200 and the first fixing member 12, respectively. The first fixing member 12 abuts against the side of the first high-temperature resistant sealing member 11 away from the top surface of the cylindrical atmospheric furnace 200, so that the first high-temperature resistant sealing member 11 is in close contact with the top surface of the cylindrical atmospheric furnace 200, preventing high-temperature gas from entering between the top surface 220 and the first high-temperature resistant sealing member 11 through the upper opening of the top surface 220 of the cylindrical atmospheric furnace 200, avoiding leakage of high-temperature gas, and ensuring the sealing performance of the first high-temperature resistant sealing member 11.

[0022] like Figure 1 , Figure 4 and Figure 5As shown, the lower sealing assembly 20 includes a second high-temperature resistant sealing element 21, wherein the second high-temperature resistant sealing element 21 includes a first high-temperature resistant sealing block 211 and a second high-temperature resistant sealing block 212. The first high-temperature resistant sealing block 211 and the second high-temperature resistant sealing block 212 form a second high-temperature resistant sealing element 21 with a receiving space. The second high-temperature resistant sealing element 21 is sleeved on the pull rod 250 and the creep extensometer 260 through the receiving space, and the receiving space of the second high-temperature resistant sealing element 21 matches the shape and size of the structure composed of the pull rod 250 and the creep extensometer 260 to ensure the sealing performance of the second high-temperature resistant sealing element 21, while ensuring that the pull rod 250 and the creep extensometer 260 can move. The second high-temperature resistant sealing component 21 is disposed on the bottom surface 230 of the cylindrical atmospheric furnace 200. The pull rod 250 and the creep extensometer 260 are slidable relative to the second high-temperature resistant sealing component 21 to ensure the normal operation of the pull rod 250 of the cylindrical atmospheric furnace 200. The lower sealing assembly 20 also includes a second fixing component 22, which is fixed to the bottom surface 230 of the cylindrical atmospheric furnace 200. The second fixing component 22 fixes the second high-temperature resistant sealing component 21 to the bottom surface 230 of the cylindrical atmospheric furnace 200 along the height direction of the cylindrical atmospheric furnace 200, so that the high-temperature gas in the cylindrical atmospheric furnace 200 will not leak through the gap between the second high-temperature resistant sealing component 21 and the bottom surface 230 of the cylindrical atmospheric furnace 200, thereby further improving the sealing performance of the second high-temperature resistant sealing component 21.

[0023] According to the present invention, the cylindrical lifting atmospheric furnace sealing device 100 for creep testing, through the cooperation of the first high-temperature resistant sealing member 11 and the first fixing member 12 of the upper sealing assembly 10, allows the first high-temperature resistant sealing member 11 to be sleeved on the upper pull rod 240 of the cylindrical atmospheric furnace 200 and to seal the upper opening, thereby achieving a seal on the top of the cylindrical atmospheric furnace 200; through the cooperation of the second high-temperature resistant sealing member 21 and the second fixing member 22 of the lower sealing assembly 20, allows the second high-temperature resistant sealing member 21 to be sleeved on the lower pull rod 250 of the cylindrical atmospheric furnace 200 and to seal the lower opening, thereby achieving a seal on the bottom of the cylindrical atmospheric furnace 200. This reduces the burning damage to the testing machine pull rod and the upper and lower non-temperature resistant components, improves measurement accuracy and service life, and meets the requirements of long-term high-temperature creep testing. The apparatus described in this application reduces radiative and conductive heat dissipation from the furnace opening of the cylindrical atmospheric furnace 200, while avoiding sealing failures caused by axial tension and airflow disturbances during testing. This ensures a uniform temperature field within the cylindrical atmospheric furnace 200 during high-temperature creep axial tension or compression testing, effectively reducing energy consumption and burn-out of testing equipment, and improving the test quality and efficiency of high-temperature creep testing. Furthermore, the apparatus of this application has advantages such as low cost, interchangeable and universal components, and convenient operation, making it suitable for large-scale high-temperature creep axial tension or compression testing and possessing broad application prospects.

[0024] like Figure 1 , Figure 2 As shown, in some embodiments of the present invention, the first high-temperature resistant sealing member 11 is an annular structure. The inner ring of the first high-temperature resistant sealing member 11 is sleeved on the upper pull rod 240, and the inner ring of the first high-temperature resistant sealing member 11 is in close contact with the upper pull rod 240. That is, the wall surface of the first columnar space of the first high-temperature resistant sealing member 11 is in close contact with the outer wall of the upper pull rod 240 located in the space, so as to prevent high-temperature gas from leaking between the inner ring of the first high-temperature resistant sealing member 11 and the upper pull rod 240, and to ensure the sealing performance of the first high-temperature resistant sealing member 11.

[0025] Furthermore, in this embodiment, the first high-temperature resistant sealing component 11 is an integral structure. During installation, the integral structure of the first high-temperature resistant sealing component 11 is simply sleeved onto the upper pull rod 240. Under the action of gravity, the first high-temperature resistant sealing component 11 seals the upper opening of the cylindrical atmospheric furnace.

[0026] like Figure 3 As shown, in some embodiments of the present invention, the first fixing member 12 includes a first half-ring 121, a second half-ring 122, and a locking pin 123. The first half-ring 121 and the second half-ring 122 are connected by the locking pin 123. Specifically, the first half-ring 121 and the second half-ring 122 are both semi-ring structures. The first end of the first half-ring 121 is rotatably connected to the first end of the second half-ring 122. The second end of the first half-ring 121 and the second end of the second half-ring 122 are connected by the locking pin. The first half-ring 121 and the second half-ring 122 form an annular ring structure. The annular ring structure is tightly fitted onto the upper pull rod 240, that is, the annular ring structure is fixed on the upper pull rod 240, and the annular ring structure abuts against the side of the first high-temperature resistant sealing member 11 away from the top surface 220 of the cylindrical atmospheric furnace.

[0027] In some embodiments of the present invention, the first high-temperature resistant sealing element 11 is a high-alumina brick, which has high-temperature resistance, excellent corrosion resistance, and good thermal stability. In other embodiments of this disclosure, the first high-temperature resistant sealing element 11 may also be a silica brick, clay brick, magnesia brick, magnesia-chrome brick, etc.

[0028] like Figure 1 , Figure 4 and Figure 5 As shown, in some embodiments of the present invention, the first high-temperature resistant sealing block 211 is a "U"-shaped block, the opening direction of which is perpendicular to the thickness direction of the second high-temperature resistant sealing member 21. The second high-temperature resistant sealing block 212 seals the opening of the "U"-shaped block and forms a receiving space extending through the thickness direction of the second high-temperature resistant sealing member 21 with the "U"-shaped block. Specifically, the second high-temperature resistant sealing block 212 is adapted to the open end of the "U"-shaped block, and the second high-temperature resistant sealing block 212 and the "U"-shaped block form a cuboid structure, and the cuboid structure has a receiving space extending through its thickness direction.

[0029] In some embodiments of the present invention, the accommodating space has a long strip-shaped cross section perpendicular to the thickness direction of the second high-temperature resistant sealing member, and the creep extensometer 260 and the pull rod 250 are arranged sequentially along the length direction of the long strip-shaped cross section to ensure that the creep extensometer 260 and the pull rod 250 can move within the accommodating space.

[0030] Furthermore, the accommodating space has an elongated oval cross-section perpendicular to the thickness direction of the second high-temperature sealing component. The elongated oval cross-section has no sharp edges, which prevents the pull rod 250 and the creep extensometer 260 from being damaged by the edges of the cross-section during movement, thus protecting the pull rod 250 and the creep extensometer 260 and improving their service life.

[0031] In some embodiments of the present invention, the second fixing member 22 includes two "U"-shaped frames 221. The open ends of the two "U"-shaped frames 221 are respectively configured to connect to the bottom surface 230 of the furnace body 210 of the cylindrical atmospheric furnace 200. Each "U"-shaped frame 221 fixes the second high-temperature resistant sealing member 21 to the bottom surface 230 of the cylindrical atmospheric furnace 200 along the height direction of the second high-temperature resistant sealing member 21. Specifically, the open ends of the "U"-shaped frames 221 are connected to the bottom surface 230 of the cylindrical atmospheric furnace 200, and part of the second high-temperature resistant sealing member 21 is located inside the "U"-shaped frame 221. The two "U"-shaped frames 221 fix the second high-temperature resistant sealing block 212 to the bottom surface 230 of the cylindrical atmospheric furnace 200. Further, the two "U"-shaped frames 221 are respectively located at both ends of the "U"-shaped block, and the accommodating space is located between the two "U"-shaped frames to ensure that the creep extensometer 260 and the pull rod 250 can move within the accommodating space.

[0032] Specifically, the first "U"-shaped frame 221 is located at the bottom end of the "U"-shaped block, with the bottom end of the "U"-shaped block situated within the first "U"-shaped frame 221. The space within the first "U"-shaped frame is adapted to the bottom end of the "U"-shaped block, and the first "U"-shaped frame 221 fixes the bottom end of the "U"-shaped block to the bottom surface 230 of the cylindrical atmospheric furnace 200. The second "U"-shaped frame 221 is located at the open end of the "U"-shaped block, with the open end of the "U"-shaped block and the second high-temperature resistant sealing block 212 clamped at the open end situated within the second "U"-shaped frame 221. The combined structure of the open end of the "U"-shaped block and the second high-temperature resistant sealing block 212 clamped at the open end is adapted to the space within the second "U"-shaped frame, and the second "U"-shaped frame 221 fixes the open end of the "U"-shaped block and the second high-temperature resistant sealing block 212 to the bottom surface 230 of the cylindrical atmospheric furnace 200.

[0033] In some embodiments of the present invention, the lower sealing assembly further includes a fixing plate 23, which is configured to be connected to the bottom surface 230 of the cylindrical atmospheric furnace 200, and the fixing plate 23 is correspondingly connected to the opening end of each "U"-shaped frame 221. Specifically, the fixing plate 23 can be an annular plate structure, or it can be a plate structure with a through groove composed of two plates.

[0034] Specifically, the lower sealing assembly 20 includes two fixing plates 23, which are respectively connected to the bottom surface 230 of the furnace body 210 of the cylindrical atmospheric furnace 200. Each fixing plate 23 is connected to the open end of a "U"-shaped frame 221. Specifically, the two fixing plates 23 are respectively fixedly connected to the bottom surface 230 of the furnace body 210 of the cylindrical atmospheric furnace 200. Each fixing plate has a "U"-shaped frame connected to the side of the bottom surface 230 of the cylindrical atmospheric furnace 200 away from the bottom surface 230 of the cylindrical atmospheric furnace 200, and the open end of the "U"-shaped frame is connected to the fixing plate. That is, the "U"-shaped frame is fixed to the bottom surface 230 of the atmospheric furnace by the fixing plates 23. The two fixing plates are arranged opposite each other and form an annular structure. The inner ring of the annular structure is a through groove that runs through its thickness direction, so that the pull rod 250 and the creep extensometer 260 can pass through the through groove, ensuring that the pull rod 250 and the creep extensometer 260 can move normally.

[0035] In some embodiments of the present invention, the first high-temperature resistant sealing block 211 and the second high-temperature resistant sealing block 212 are both high-alumina bricks, which have high-temperature resistance, excellent corrosion resistance, and good thermal stability. In other embodiments of this disclosure, the first high-temperature resistant sealing block 211 and the second high-temperature resistant sealing block 212 can also be silica bricks, clay bricks, magnesia bricks, magnesia-chrome bricks, etc.

[0036] The device of the present invention also has the following advantages and beneficial effects: 1. The device of the present invention, by adapting to the sealing devices at the upper and lower parts of the cylindrical atmospheric furnace during high-temperature creep axial tension or compression tests, can effectively reduce heat dissipation at the furnace opening while avoiding sealing failure during testing due to axial tension and airflow disturbance.

[0037] 2. The device of the present invention ensures that the temperature field inside the cylindrical atmospheric furnace is uniform during high-temperature creep axial tension or compression tests, thus ensuring the stability and reliability of the test results. 3. The device of the present invention has the characteristics of low cost, easy assembly, easy maintenance and strong operability.

[0038] 4. The device of the present invention is suitable for high-temperature creep axial tension or compression testing, and can also be extended to other high-temperature mechanical testing fields.

[0039] The present invention provides a cylindrical atmospheric furnace 200, which includes a furnace body arranged opposite to each other and a cylindrical lifting atmospheric furnace sealing device for creep testing. The cylindrical lifting atmospheric furnace sealing device for creep testing includes an upper sealing component 10 and a lower sealing component 20. The upper sealing component 10 is disposed on the top surface 220 of the furnace body, and the lower sealing component 20 is disposed on the bottom surface 230 of the furnace body. The cylindrical lifting atmospheric furnace sealing device for creep testing is the cylindrical lifting atmospheric furnace sealing device for creep testing according to any of the above embodiments.

[0040] According to the present invention, the first high-temperature resistant sealing member 11 and the first fixing member 12 of the upper sealing assembly 10 are used to fit the upper pull rod 240 of the cylindrical atmospheric furnace 200 and seal the upper opening, thereby achieving a seal on the top of the cylindrical atmospheric furnace 200; the second high-temperature resistant sealing member 21 and the second fixing member 22 of the lower sealing assembly 20 are used to fit the lower pull rod 250 of the cylindrical atmospheric furnace 200 and seal the lower opening, thereby achieving a seal on the bottom of the cylindrical atmospheric furnace 200. This reduces the burning damage to the testing machine pull rod and the upper and lower non-temperature resistant components, improves measurement accuracy and service life, and meets the requirements of long-term high-temperature creep testing. The apparatus described in this application reduces radiative and conductive heat dissipation from the furnace opening of the cylindrical atmospheric furnace 200, while avoiding sealing failures caused by axial tension and airflow disturbances during testing. This ensures a uniform temperature field within the cylindrical atmospheric furnace 200 during high-temperature creep axial tension or compression testing, effectively reducing energy consumption and burn-out of testing equipment, and improving the test quality and efficiency of high-temperature creep testing. Furthermore, the apparatus of this application has advantages such as low cost, interchangeable and universal components, and convenient operation, making it suitable for large-scale high-temperature creep axial tension or compression testing and possessing broad application prospects.

[0041] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A cylindrical lifting atmospheric furnace sealing device for creep testing, characterized in that, Includes upper sealing assembly and lower sealing assembly; The upper sealing assembly includes: a first high-temperature resistant sealing member and a first fixing member. The first high-temperature resistant sealing member is configured to be disposed on the top surface of the cylindrical atmospheric furnace. The first high-temperature resistant sealing member has a first columnar space. The first high-temperature resistant sealing member is configured to be sleeved on the upper pull rod of the cylindrical atmospheric furnace through the first columnar space. The first fixing member abuts against the side of the first high-temperature resistant sealing member away from the top surface of the cylindrical atmospheric furnace. The first fixing member is configured to be fixed to the upper pull rod. The lower sealing assembly includes: a second high-temperature resistant sealing component and a second fixing component. The second high-temperature resistant sealing component includes a first high-temperature resistant sealing block and a second high-temperature resistant sealing block. The first high-temperature resistant sealing block and the second high-temperature resistant sealing block form an accommodating space. The second high-temperature resistant sealing component is configured to be sleeved on the pull rod and creep extensometer of the slidable cylindrical atmospheric furnace through the accommodating space. The second fixing component is configured to fix the second high-temperature resistant sealing component to the bottom surface of the cylindrical atmospheric furnace.

2. The cylindrical atmospheric furnace sealing device for long-term testing according to claim 1, characterized in that, The first high-temperature resistant sealing component is a ring structure, and the inner ring of the first high-temperature resistant sealing component is adapted to the upper pull rod.

3. The cylindrical atmospheric furnace sealing device for long-term testing according to claim 1, characterized in that, The first fastener includes a first half-ring, a second half-ring, and a locking pin. The first half-ring and the second half-ring are connected by the locking pin, and the first half-ring and the second half-ring form a ring structure that is tightly connected to the upper pull rod.

4. The cylindrical atmospheric furnace sealing device for long-term testing according to claim 1, characterized in that, The first high-temperature resistant sealing component is a high-alumina brick.

5. The cylindrical atmospheric furnace sealing device for long-term testing according to claim 1, characterized in that, The first high-temperature resistant sealing block is a "U"-shaped block. The opening direction of the "U"-shaped block is perpendicular to the thickness direction of the second high-temperature resistant sealing component. The second high-temperature resistant sealing block seals the opening of the "U"-shaped block and forms an accommodating space that extends through the thickness direction of the second high-temperature resistant sealing component with the "U"-shaped block.

6. The cylindrical atmospheric furnace sealing device for long-term testing according to claim 5, characterized in that, The accommodating space has a long strip shape in cross-section perpendicular to the thickness direction of the second high-temperature resistant sealing component.

7. The cylindrical atmospheric furnace sealing device for long-term testing according to claim 5, characterized in that, The second fixing member includes two spaced-apart "U"-shaped frames. The open ends of the two "U"-shaped frames are respectively configured to connect to the bottom surface of the cylindrical atmospheric furnace. The two "U"-shaped frames are respectively located at the open end and the bottom end of the "U"-shaped block. The accommodating space is located between the two "U"-shaped frames. The shape of the "U"-shaped frames is adapted to the shape of the second high-temperature resistant sealing member.

8. The cylindrical lifting atmospheric furnace sealing device for creep testing according to claim 6, characterized in that, The lower sealing assembly also includes a fixing plate, which is configured to be connected to the bottom surface of the cylindrical atmospheric furnace, and the fixing plate is correspondingly connected to the opening end of each of the "U"-shaped frames.

9. The cylindrical lifting atmospheric furnace sealing device for creep testing according to claim 1, characterized in that, Both the first and second high-temperature resistant sealing blocks are made of high-alumina bricks.

10. A cylindrical atmospheric furnace, characterized in that, The cylindrical atmospheric furnace includes a furnace body arranged opposite to each other and a cylindrical lifting atmospheric furnace sealing device for creep testing. The cylindrical lifting atmospheric furnace sealing device for creep testing includes an upper sealing component and a lower sealing component. The upper sealing component is disposed on the top surface of the furnace body, and the lower sealing component is disposed on the bottom surface of the furnace body. The cylindrical lifting atmospheric furnace sealing device for creep testing is the cylindrical lifting atmospheric furnace sealing device for creep testing according to any one of claims 1 to 9.

Images