A cylinder atmospheric furnace sealing device for durability test and cylinder atmospheric furnace

Abstract

The application provides a cylinder atmospheric furnace sealing device for durability test and a cylinder 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; the first high-temperature-resistant sealing piece is arranged on the upper pull rod; the first fixing piece is arranged on the side of the first high-temperature-resistant sealing piece away from the top surface of the cylinder atmospheric furnace; and the first fixing piece is arranged on the upper pull rod; the lower sealing assembly comprises a second high-temperature-resistant sealing piece and a second fixing piece; the second high-temperature-resistant sealing piece is arranged on the lower pull rod; and the second fixing piece is arranged on the bottom surface of the cylinder atmospheric furnace along the height direction of the second high-temperature-resistant sealing piece. The device can reduce the radiation and conduction heat dissipation of the furnace mouth of the cylinder atmospheric furnace, avoid the 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 the energy consumption and the 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 atmospheric furnace sealing device and a cylindrical atmospheric furnace for long-term testing. Background Technology

[0002] High-temperature creep strength testing is a mechanical property test method that determines the maximum stress that a material will not fracture under constant high temperature and load conditions within a specified time. This test method is performed using a high-temperature creep strength testing machine. It is a material mechanical property test that determines the maximum stress that a material will not fracture under a constant load at a certain temperature for a specified duration. High-temperature creep strength is an important basis for the design and material selection of high-temperature components.

[0003] The method of endurance strength test is as follows: maintain a constant temperature, select different stresses for a group of specimens and test until fracture, obtain a set of test durations, and then draw the stress-duration relationship curve on logarithmic graph paper to calculate the stress at the specified time, i.e. endurance strength.

[0004] The duration of the endurance test depends on the product. For example, for jet engine parts, endurance strength data of several hundred to several thousand hours is generally provided; while materials for power plant equipment require endurance strength data of one hundred thousand to two hundred thousand hours.

[0005] In prolonged high-temperature endurance testing, the upper and lower openings of the cylindrical lifting atmospheric furnace are typically sealed with aluminum silicate cotton. Because the furnace needs to be raised and lowered before and after testing, the gap between the furnace opening and the upper and lower pull rods of the testing machine is relatively large. This makes the aluminum silicate cotton sealing material prone to coming loose during testing due to the movement of the pull rods, leading to significant temperature fluctuations in the atmospheric furnace. Simultaneously, it can cause burn-in to the pull rods and other components of the testing machine, affecting testing accuracy and equipment lifespan, making it difficult to meet the requirements of long-term high-temperature endurance testing. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art, and provides a cylindrical atmospheric furnace sealing device and a cylindrical atmospheric furnace for long-term testing.

[0007] This invention provides a sealing device for a cylindrical atmospheric furnace for long-term 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 member and a second fixing member. The second high-temperature resistant sealing member has a second columnar space. The second high-temperature resistant sealing member is configured to be sleeved on the pull rod of the slidable cylindrical atmospheric furnace through the second columnar space. The second fixing member is configured to be fixedly connected to the bottom surface of the cylindrical atmospheric furnace. The second fixing member fixes the second high-temperature resistant sealing member to the bottom surface of the cylindrical atmospheric furnace along the height direction of the second high-temperature resistant sealing member.

[0008] 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.

[0009] 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.

[0010] In some embodiments of the present invention, the first high-temperature resistant sealing component is a high-alumina brick.

[0011] In some embodiments of the present invention, the second high-temperature resistant sealing member includes two opposing second high-temperature resistant sealing blocks, the two second high-temperature resistant sealing blocks forming a second columnar space, the second columnar space being adapted to the pull rod.

[0012] In some embodiments of the present invention, the second fastener includes two spaced and parallel U-shaped frames, the relative directions of the two U-shaped frames being perpendicular to the relative directions of the two second high-temperature resistant sealing blocks.

[0013] In some embodiments of the present invention, the two “U”-shaped frames are respectively located near the two ends of the second high-temperature resistant sealing block.

[0014] In some embodiments of the present invention, the lower sealing assembly further includes two fixing plates disposed opposite to each other, the two fixing plates forming a through groove, one side of the fixing plate being fixedly connected to the bottom surface of the cylindrical atmospheric furnace, and the other side of the fixing plate being connected to the second fixing member.

[0015] In some embodiments of the present invention, the second high-temperature resistant sealing component is a high-alumina brick.

[0016] This invention provides a cylindrical atmospheric furnace, which includes two furnace bodies arranged opposite to each other and a cylindrical atmospheric furnace sealing device for long-term testing. The cylindrical atmospheric furnace sealing device for long-term 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 atmospheric furnace sealing device for long-term testing is the cylindrical atmospheric furnace sealing device for long-term testing according to any of the above embodiments.

[0017] The cylindrical atmospheric furnace sealing device and cylindrical atmospheric furnace of this invention for endurance testing, 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 surface 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 furnace 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 endurance 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 endurance 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 endurance axial tension or compression testing and possessing broad application prospects. Attached Figure Description

[0018] 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 assembly structure of the cylindrical atmospheric furnace sealing device used for long-term 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 a cylindrical atmospheric furnace sealing device used for long-term testing. Figure 5 for Figure 1 The diagram shows the structure of the second fastener and the fixing plate.

[0019] The labels in the attached diagram are as follows: 100. A sealing device for a cylindrical atmospheric furnace used for long-term 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. 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. Detailed Implementation

[0020] 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.

[0021] like Figures 1 to 5 As shown, this embodiment of the invention provides a cylindrical atmospheric furnace plugging device 100 for long-term testing, including an upper plugging assembly 10 and a lower plugging 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 member 21 and a second fixing member 22. The second high-temperature resistant sealing member 21 is configured to be disposed on the bottom surface of the cylindrical atmospheric furnace 200 and cover the lower opening. The second high-temperature resistant sealing member 21 has a second columnar space. The second high-temperature resistant sealing member 21 is configured to be sleeved on the pull rod 250 of the slidable cylindrical atmospheric furnace 200 through the second columnar space. The second fixing member 22 is configured to be fixedly connected to the bottom surface of the cylindrical atmospheric furnace 200. The second fixing member 22 fixes the second high-temperature resistant sealing member 21 to the bottom surface of the cylindrical atmospheric furnace 200 along the height direction of the second high-temperature resistant sealing member 21.

[0022] Specifically, the cylindrical atmospheric furnace sealing device 100 for long-term testing includes an upper sealing component 10 and a lower sealing component 20. The upper sealing component 10 is located on the top surface 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. Through the combined action of the upper sealing component 10 and the lower sealing component 20, the upper and lower ends of the cylindrical atmospheric furnace 200 are sealed to improve the sealing performance of the cylindrical atmospheric furnace 200.

[0023] 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.

[0024] like Figure 1 , Figure 4As shown, the lower sealing assembly 20 includes a second high-temperature resistant sealing element 21. The second high-temperature resistant sealing element 21 has a second cylindrical space. The second high-temperature resistant sealing element 21 is sleeved on the slidable pull rod 250 through the second cylindrical space, and the shape and size of the second cylindrical space of the second high-temperature resistant sealing element 21 match those of the pull rod 250 to ensure the sealing performance of the second high-temperature resistant sealing element 21. The second high-temperature resistant sealing element 21 is disposed on the bottom surface 230 of the cylindrical atmospheric furnace 200. The pull rod 250 is slidable relative to the second high-temperature resistant sealing element 21 to ensure the normal operation of the pull rod 250 of the cylindrical atmospheric furnace 200, while not affecting the sealing performance of the second high-temperature resistant sealing element 21. The lower sealing assembly 20 also includes a second fixing member 22, which 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 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 member 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 member 21.

[0025] According to the present invention, the cylindrical atmospheric furnace sealing device 100 for long-term 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 surface 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, thereby preventing large temperature fluctuations inside the cylindrical atmospheric furnace, reducing the burn-out of the testing machine pull rod and other components at the top and bottom, improving the testing accuracy and service life of the cylindrical atmospheric furnace, and meeting the needs of long-term high-temperature long-term testing. The apparatus described in this application reduces radiative and conductive heat loss 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 endurance 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 endurance 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 endurance axial tension or compression testing and possessing broad application prospects.

[0026] like Figure 1 , Figure 2As 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figure 1 , Figure 4As shown, in some embodiments of the present invention, the second high-temperature resistant sealing member 21 includes two opposing second high-temperature resistant sealing blocks 211, which form a second cylindrical space. The second cylindrical space is adapted to the pull rod 250, and the pull rod 250 can move relative to the second high-temperature resistant sealing member 21 to ensure the normal operation of the pull rod 250. The second fixing member 22 binds the second high-temperature resistant sealing member 21 along the relative direction of the two second high-temperature resistant sealing blocks 211, so that the second high-temperature resistant sealing member 21 is always kept in the state of being sleeved on the pull rod 250, ensuring the sealing performance of the second high-temperature resistant sealing member 21. The second fastener 22 is fixed to the bottom surface 230 of the cylindrical atmospheric furnace 200. The second fastener 22 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 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 member 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 member 21.

[0031] like Figure 5 As shown, in some embodiments of the present invention, the second fixing member 22 includes two oppositely arranged "U"-shaped frames 221, which bind the two second high-temperature resistant sealing blocks 211 along their opposite directions. Specifically, the open end of the "U"-shaped frame 221 is bolted to the bottom surface 230 of the cylindrical atmospheric furnace 200, and part of the second high-temperature resistant sealing block 211 is located inside the "U"-shaped frame 221, which fixes the second high-temperature resistant sealing block 211 to the bottom surface 230 of the cylindrical atmospheric furnace 200. Further, the two "U"-shaped frames 221 are arranged opposite to each other, and the relative direction of the two "U"-shaped frames 221 is perpendicular to the relative direction of the two second high-temperature resistant sealing blocks 211. The constraint force of the second fastener 22 can be further improved by the two spaced "U"-shaped frames 221, ensuring that the two second high-temperature resistant sealing blocks 211 will not loosen and will always have the second columnar space, that is, the second high-temperature resistant sealing component 21 will always be fitted onto the pull rod 250, ensuring the sealing performance of the second high-temperature resistant sealing component 21.

[0032] Furthermore, the two "U"-shaped frames 221 are arranged in parallel, and the distance between the two "U"-shaped frames 221 and the center of the inner ring of the second high-temperature resistant sealing component 21 is equal, so that the two second high-temperature resistant sealing blocks 211 are subjected to more uniform force and the service life of the second high-temperature resistant sealing component 21 is improved.

[0033] In some embodiments of the present invention, two "U"-shaped frames 221 are respectively located near the two ends of the second high-temperature resistant sealing block 211. By setting the two "U"-shaped frames 221 at the two ends of the second high-temperature resistant sealing block 211, the installation of the second high-temperature resistant sealing block 211 is made more convenient.

[0034] In some embodiments of the present invention, the lower sealing assembly 20 further includes two opposing fixing plates 23, which are configured to be fixedly connected to the bottom surface 230 of the cylindrical atmospheric furnace 200, and the second fixing member 22 is fixedly connected to the fixing plates 23. Specifically, the two fixing plates 23 are respectively fixedly connected to the bottom surfaces 230 of the two furnace bodies 210 of the cylindrical atmospheric furnace 200, and a "U"-shaped frame 221 is connected to the side of each fixing plate 23 away from the bottom surface 230 of the cylindrical atmospheric furnace 200, and the open end of the "U"-shaped frame 221 is connected to the fixing plate 23, that is, the "U"-shaped frame 221 is fixed to the bottom surface 230 of the atmospheric furnace by the fixing plates 23. Two fixing plates 23 are arranged opposite each other and form a ring structure. The outer ring diameter of the ring structure formed by the fixing plates 23 is larger than the outer ring diameter of the second high-temperature resistant sealing member 21, and the inner ring diameter of the ring structure formed by the fixing plates 23 is smaller than the outer ring diameter of the second high-temperature resistant sealing member 21, so that the second high-temperature resistant sealing member 21 is located on the side of the fixing plate 23 away from the atmospheric furnace.

[0035] Furthermore, a through groove is formed in the middle of the fixed structure formed by the two fixed plates 23. When the sealing component 20 is installed on the bottom surface 230 of the cylindrical atmospheric pressure 200, the pull rod 250 passes through the through groove and can move relative to the through groove to ensure that the pull rod 250 can operate normally.

[0036] In some embodiments of the present invention, the second high-temperature resistant sealing block 211 is a high-alumina brick, which has high-temperature resistance, excellent corrosion resistance, and good thermal stability. In other embodiments of the present disclosure, the second high-temperature resistant sealing block 211 may also be a silica brick, clay brick, magnesia brick, magnesia-chrome brick, etc.

[0037] 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 of the upper and lower parts of the cylindrical atmospheric furnace in high-temperature sustained axial tension or compression tests, reduces the radiative and conductive heat dissipation of the furnace opening while avoiding the problem of sealing failure during the test due to axial tension and airflow disturbance.

[0038] 2. The device of the present invention ensures that the temperature field inside the cylindrical atmospheric furnace is uniform during high-temperature and long-term axial tensile 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 maintenance and strong operability.

[0039] 4. The device of the present invention is suitable for high-temperature long-term axial tensile or compression testing, and can also be extended to other high-temperature mechanical testing fields.

[0040] The present invention provides a cylindrical atmospheric furnace 200, which includes two furnace bodies arranged opposite to each other and a cylindrical atmospheric furnace sealing device 100 for endurance testing. The cylindrical atmospheric furnace sealing device 100 for endurance 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 atmospheric furnace sealing device 100 for endurance testing is the cylindrical atmospheric furnace sealing device 100 for endurance testing according to any of the above embodiments.

[0041] According to the present invention, the cylindrical atmospheric furnace 200 achieves a seal on its top surface by means of the cooperation between the first high-temperature resistant sealing member 11 and the first fixing member 12 of the upper sealing assembly 10, which is fitted onto the upper pull rod 240 of the cylindrical atmospheric furnace 200 and seals the upper opening. Similarly, the lower sealing assembly 20 achieves a seal on its bottom by means of the cooperation between the second high-temperature resistant sealing member 21 and the second fixing member 22, which is fitted onto the lower pull rod 250 of the cylindrical atmospheric furnace 200 and seals the lower opening. The cylindrical atmospheric furnace 200 of this application reduces radiative and conductive heat dissipation from the furnace opening while avoiding sealing failure during testing due to axial tension and airflow disturbance. This ensures a uniform temperature field inside the furnace during high-temperature endurance 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 endurance testing. In addition, the cylindrical atmospheric furnace 200 of this application has the advantages of low cost, universal and replaceable parts, and convenient operation, making it suitable for large-scale high-temperature long-term axial tensile or compression testing, and has broad application prospects.

[0042] 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 sealing device for a cylindrical atmospheric furnace used in long-term 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 member and a second fixing member. The second high-temperature resistant sealing member has a second columnar space. The second high-temperature resistant sealing member is configured to be sleeved on the pull rod of the slidable cylindrical atmospheric furnace through the second columnar space. The second fixing member is configured to be fixedly connected to the bottom surface of the cylindrical atmospheric furnace. The second fixing member fixes the second high-temperature resistant sealing member to the bottom surface of the cylindrical atmospheric furnace along the height direction of the second high-temperature resistant sealing member.

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 second high-temperature resistant sealing component includes two opposing high-temperature resistant sealing blocks, which enclose the second columnar space and are adapted to the pull rod.

6. The cylindrical atmospheric furnace sealing device for long-term testing according to claim 5, characterized in that, The second fastener includes two spaced and parallel "U"-shaped frames, the relative directions of the two "U"-shaped frames being perpendicular to the relative directions of the two second high-temperature resistant sealing blocks.

7. The cylindrical atmospheric furnace sealing device for long-term testing according to claim 6, characterized in that, The two "U"-shaped frames are respectively located near the two ends of the second high-temperature resistant sealing block.

8. The cylindrical atmospheric furnace sealing device for long-term testing according to claim 1, characterized in that, The lower sealing assembly also includes two fixing plates arranged opposite each other, the two fixing plates forming a through groove, one side of the fixing plate being fixedly connected to the bottom surface of the cylindrical atmospheric furnace, and the other side of the fixing plate being connected to the second fixing member.

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

10. A cylindrical atmospheric furnace, characterized in that, The cylindrical atmospheric furnace includes two furnace bodies arranged opposite each other and a cylindrical atmospheric furnace sealing device for long-term testing. The cylindrical atmospheric furnace sealing device for long-term 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 atmospheric furnace sealing device for long-term testing is the cylindrical atmospheric furnace sealing device for long-term testing according to any one of claims 1 to 9.

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