Seamless steel tube annealing and conveying device

Abstract

The seamless steel pipe annealing and conveying device comprises an annealing furnace, symmetrical sand seal grooves are formed in the two ends of the bottom of an inner cavity of the annealing furnace, the sand seal grooves are filled with fine sand and used for sealing the annealing furnace, reciprocating grooves are evenly formed in one sides of the sand seal grooves, and pressurizing springs II are arranged at one ends of the reciprocating grooves and used for pressurizing the reciprocating grooves. An adjusting block is arranged at one end of the pressurizing spring II and used for extruding fine sand, and a magnet I is arranged at the end, right facing the sand sealing groove, of the adjusting block; a trolley base is arranged at the bottom of the annealing furnace, and symmetrical sealing bases are arranged on the two sides of the trolley base and used for sealing the sand sealing groove. Through the wave shape of the sand cutter I, the magnet II at the wave crest position of the sand cutter I repels the magnet I in the adjusting block, and the adjusting block reciprocates in cooperation with the extrusion spring II, so that the space size of the same position of the sand seal groove is changed in cooperation with the position change of the wave crest and the wave trough of the sand cutter I, and the mobility of fine sand in the sand seal groove is enhanced; and the uniform distribution of the fine sand is improved.

Description

Technical Field

[0001] This application relates to the field of metal processing technology, and in particular to a seamless steel pipe annealing material conveying device. Background Technology

[0002] Annealing furnaces are heat treatment furnaces used in the processing of metal and non-metal materials to perform high-temperature annealing heat treatment on metals to improve material properties. One type is the trolley-type annealing furnace, in which the material is placed on a trolley, and the trolley is pulled into the annealing furnace by a traction mechanism. Then the furnace door is lowered and the furnace opening is sealed. The material is annealed by the heating device inside the furnace. After annealing, the material inside the furnace is allowed to cool statically. Then the furnace door is opened, and the trolley is pulled out by the traction mechanism to remove the annealed material.

[0003] In this process, the contact parts between the trolley and the annealing furnace, namely the joints between the trolley and the furnace body on both sides and the joints between the trolley and the rear of the furnace body, are generally sealed with a soft seal with gaps because the trolley needs to move and there is also the problem of expansion after heating. Most annealing furnaces use sand sealing.

[0004] A sand sealing groove is provided at the bottom of the annealing furnace, and the groove is filled with refractory fine sand. Sand knives are provided on both sides of the trolley. When the trolley enters the annealing furnace, the sand knives will be inserted into the fine sand in the sand sealing groove. At this time, the fine sand will wrap around the sand knives and complete the seal. The front of the trolley will press against the soft seal of the annealing furnace (a high-temperature resistant non-metallic material can be used here), and the soft seal material here will be pressed tightly by its own pressure to complete the seal.

[0005] However, with this sand-sealing method, when the sand scalpel is inserted into the fine sand, the pushing force of the scalpel causes some of the sand to be pushed to the sides of the scalpel, while most of the sand is pushed in the direction of the scalpel's movement. When the moving sand accumulates to a certain height, it collapses to the sides under gravity. Depending on the distance of the sand-sealing groove, the height distribution of the sand under the pushing force of the scalpel is uneven. This results in the sand thickness in the sand-sealing groove near the furnace door being less than the sand thickness in the sand-sealing groove further away from the furnace door. During heating, the areas with lower sand thickness have poorer heat insulation compared to the areas with higher sand thickness, leading to uneven temperature inside the furnace. At the same time, due to the fluidity of the sand, gaps inevitably appear between the sand particles. When the temperature and pressure inside the furnace rise, these gaps can lead to leakage, causing an imbalance in the high-temperature environment inside the annealing furnace, or even allowing outside air to enter the annealing furnace and cause oxidation reactions with the materials. Summary of the Invention

[0006] This application proposes a seamless steel pipe annealing material conveying device, which features the advantages of: magnet II repelling magnet I, the elastic force of pressure spring II forming the reciprocating motion of the adjusting block; the constantly changing position of the crest and trough of sand cutter I altering the size of the space within the sand sealing groove; uniform distribution of fine sand within the sand sealing groove under spatial changes; pressure spring II pushing the adjusting block to compress the fine sand and increase its density; high-temperature resistant fiber cloth enveloping some fine sand into the gaps to increase the friction between the adjusting block and the reciprocating groove; gas in the gas delivery pipe absorbing heat and expanding, hindering the movement of the adjusting block; and expanded gas being input into a high-temperature elastic hose to expand and compress the surrounding fine sand, increasing its density. This device aims to solve the problems of uneven fine sand distribution and leakage caused by gaps in the fine sand within the sand sealing groove.

[0007] To achieve the above objectives, this application adopts the following technical solution: a seamless steel pipe annealing material conveying device, including an annealing furnace, wherein symmetrical sand sealing grooves are provided at both ends of the bottom of the inner cavity of the annealing furnace, the sand sealing grooves are filled with fine sand for sealing the annealing furnace, a uniformly distributed reciprocating groove is provided on one side of the sand sealing groove, a pressure spring II is provided at one end of the reciprocating groove, an adjusting block is provided at one end of the pressure spring II for squeezing the fine sand, and a magnet I is provided at the end of the adjusting block facing the sand sealing groove;

[0008] The bottom of the annealing furnace is provided with a trolley seat, and symmetrical sealing seats are provided on both sides of the trolley seat for sealing the sand sealing groove. A sand knife I is provided at the bottom of the sealing seat. The side of the sand knife I facing the adjusting block is wavy, and a magnet II is provided at the crest of the wave. The magnet II and the magnet I repel each other and are used to cooperate with the magnet I to drive the adjusting block to reciprocate.

[0009] The annealing furnace is equipped with a rear sealing device at one end of the bottom, which is used to seal the rear side in conjunction with the trolley seat;

[0010] The bottom of both sides of the annealing furnace is equipped with a gas pressure regulating device to compensate for the loss of elasticity of the pressure spring II;

[0011] Preferably, the rear sealing device includes a movable groove opened at one end of the annealing furnace, a pressure spring I is provided at the top of the movable groove, a pressure plate is provided at the bottom of the pressure spring I, and fine sand is filled below the pressure plate to compress the fine sand and increase its density.

[0012] Preferably, a storage slot is provided below the movable slot, and a return spring is provided at one end of the storage slot. A sealing plate is provided at one end of the return spring to block the movable slot and prevent the leakage of fine sand.

[0013] Preferably, one end of the trolley seat is provided with a sanding knife II, which is inserted into the receiving groove, and the height of the sanding knife II is the same as the height of the receiving groove, so as to push the sealing plate and complete the sealing with fine sand.

[0014] Preferably, there is a gap between the sidewall of the adjusting block and the sidewall of the reciprocating groove for rapid braking of the adjusting block.

[0015] Preferably, the port of the reciprocating groove is connected to the sand sealing groove, and the port is wrapped with high-temperature resistant fiber cloth to impede the flow of fine sand and form friction compensation.

[0016] Preferably, the gas pressure regulating device includes symmetrical gas supply pipes located on both sides of the bottom of the annealing furnace for absorbing heat to form expanding gas. One side of each gas supply pipe is provided with a uniformly distributed limiting pipe, and a connecting rod is provided inside the limiting pipe. One end of the connecting rod is connected to one end of the regulating block for inputting the pressure of the expanding gas into the regulating block.

[0017] Preferably, the bottom end of the sand sealing trough is provided with a high-temperature elastic rubber tube to change the density of fine sand in the sand sealing trough, and the bottom of the gas supply pipe is provided with a uniformly distributed connecting pipe, one end of which is connected to the high-temperature elastic rubber tube for inputting gas into the high-temperature elastic rubber tube.

[0018] Preferably, the top of the pressure plate is provided with a high-temperature magnet I, and the top of the movable groove is provided with a high-temperature magnet II. The high-temperature magnet I and the high-temperature magnet II are in an attractive state to compensate for the deformation loss of the pressure spring I.

[0019] Preferably, a high-temperature magnet III is provided at the end of the adjusting block facing the gas transmission pipe, and a high-temperature magnet IV is provided at the end of the reciprocating groove near the gas transmission pipe. The high-temperature magnet III and the high-temperature magnet IV repel each other and are used to compensate for the deformation loss of the pressure spring II.

[0020] This application provides a seamless steel pipe annealing material conveying device. By inserting a sand cutter I into the fine sand in the sand sealing groove, the sand cutter I applies a pushing force to the surrounding fine sand. As the crest of the sand cutter I gradually approaches the adjusting block, the pushing force of the sand cutter I on the fine sand to both sides will be applied to the adjusting block, causing the adjusting block to gradually move towards the gas conveying pipe. When the magnet II at the crest position on the sand cutter I approaches the magnet I on the adjusting block, a mutual repulsion reaction occurs, and the adjusting block will accelerate its movement towards the gas conveying pipe.

[0021] See Figure 8Taking the sand as a stationary state, the distance from the side wall of the sand sealing groove to the initial position of the sand cutter I is L4, the distance from the adjusting block to the initial position of the sand cutter I is L1 (one unit length), the distance from the crest of the wave to the horizontal line at the initial position of the sand cutter I is L4, and the distance from the trough of the wave to the horizontal line at the initial position of the sand cutter I is L5, with L4 and L5 each being 0.5 units. During the movement of the sand cutter, the distance from the adjusting block to the crest of the sand cutter I is L2. The length of L2 is affected by the pushing force of the fine sand and the repulsive force of the magnet, and is greater than the sum of the lengths L1 and L4. The distance from the adjusting block to the trough of the sand cutter I is L3. The length of L3 is only affected by the pushing force of the fine sand, and is greater than the length of L1 but less than the length of L2. In other words, when the crest of the sand scalpel I reaches the position of an adjusting block, the space of the sand sealing groove between the sand scalpel I and the adjusting block increases. The space of the sand sealing groove between two adjacent adjusting blocks increases due to the presence of the trough, which means the length of L41 increases. When the crest leaves the adjusting block, the space of the sand sealing groove decreases. This creates a change in the space of the sand sealing groove as the sand scalpel I moves forward, resulting in a higher probability that the fine sand in the area with the reduced space will flow in the direction of the increased space (that is, the fine sand in the direction of the sand scalpel I moves in the opposite direction). This reduces the difference in the thickness of the fine sand in the sand sealing groove and improves the heat insulation capacity of the sand sealing groove.

[0022] Meanwhile, when the sand knife I is fully inserted into the sand sealing groove, the trough of the sand knife I faces the adjusting block, so that the adjusting block loses the repulsive force of the magnet II. This causes the pressure spring II to push the adjusting block to move in the direction of the sand knife I, thereby squeezing the fine sand between the adjusting block and the sand knife I, increasing the density of the surrounding fine sand, thereby reducing the gap between the fine sand and reducing the possibility of leakage through the sand sealing groove during subsequent annealing.

[0023] Meanwhile, during high-temperature annealing in the annealing furnace, the temperature is reduced by passing through the furnace wall before entering the reciprocating groove. This causes the elastic force of the pressure spring II to decrease due to heat. At this time, the adjusting block tends to move towards the gas supply pipe. Meanwhile, the high-temperature resistant fiber cloth around the adjusting block is compressed by the surrounding fine sand as the adjusting block moves back and forth. This causes a portion of the high-temperature resistant fiber cloth to be pressed into the gap between the adjusting block and the reciprocating groove. The adjusting block passes through the high-temperature resistant fiber cloth containing fine sand, increasing the friction between it and the inner wall of the reciprocating groove. Since the elastic force of the pressure spring II decreases, the increased friction compensates for the decreased elastic force, reducing the movement of the adjusting block towards the gas supply pipe. This avoids the problem of excessive movement of the adjusting block causing the fine sand in the sand sealing groove to lose pressure and decrease in density.

[0024] Meanwhile, the gas in the gas supply pipe will expand thermally after absorbing the temperature of the furnace wall. Part of the expanded gas will exert a force on the adjusting block in the direction of sand knife I through the limiting pipe and connecting rod. Combined with the friction of the high-temperature resistant fiber cloth, elastic compensation will be performed. At the same time, the expanded gas will be introduced into the high-temperature elastic rubber tube through the connecting pipe, causing the high-temperature elastic rubber tube to expand thermally and exert pressure on the fine sand at the bottom of the sand sealing groove, thereby further increasing the density of the fine sand in the sand sealing groove and improving the sealing performance of the fine sand in the sand sealing groove. Attached Figure Description

[0025] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0026] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0027] Figure 1 This is a schematic diagram of the overall shape of the invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0029] Figure 3 This is a schematic diagram showing the structural arrangement of the present invention;

[0030] Figure 4 This is a schematic diagram showing the positions of the sanding blade I and the adjusting block of the present invention;

[0031] Figure 5 This is a schematic diagram showing the location of the gas pressure regulating device of the present invention;

[0032] Figure 6 This is a schematic diagram of the three-dimensional structure of the sander blade I of the present invention;

[0033] Figure 7 This is a schematic diagram showing the position of magnet II in this invention;

[0034] Figure 8 This is a schematic diagram showing the change in the size of the sand sealing groove space during the movement of the sand cutter in this invention.

[0036] 1. Annealing furnace; 2. Movable groove; 3. Pressure spring I; 4. Pressure plate; 5. Storage groove; 6. Return spring; 7. Sealing plate; 8. Reciprocating groove; 9. Adjusting block; 901. Magnet I; 10. High-temperature resistant fiber cloth; 11. Gas supply pipe; 12. Limiting pipe; 121. Connecting rod; 13. Pressure spring II; 14. Connecting pipe; 15. Sand sealing groove; 16. High-temperature elastic hose; 17. Carriage base; 18. Sealing seat; 19. Sanding knife I; 191. Magnet II; 20. Sanding knife II. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0038] Example 1

[0039] Please see Figure 1 A seamless steel pipe annealing material conveying device includes an annealing furnace 1. The annealing furnace 1 is equipped with basic devices of existing annealing furnaces, such as a heating device, a gas compensation device, and a furnace door sealing device, so that the annealing furnace 1 can effectively anneal the materials inside the furnace after the furnace door is closed.

[0040] See Figures 2 to 3 An annealing furnace 1 has a movable groove 2 at the end away from the furnace opening. A pressure spring I3 is fixedly connected to the top of the movable groove 2, and a pressure plate 4 is fixedly connected to the bottom of the pressure spring I3. The movable groove 2 located below the pressure plate 4 is filled with fine sand. When the annealing furnace 1 is annealing at high temperature, the heat can be weakened by the furnace wall and then transferred to the movable groove 2, which reduces the elasticity of the pressure spring I3. This allows the pressure plate 4 to squeeze the fine sand downward, increasing the density of the fine sand at this point, and making the sand knife II20 below fit tightly with the fine sand at this point.

[0041] See Figures 2 to 3 An annealing furnace 1 has a storage groove 5 at the end away from the furnace opening. A return spring 6 is fixedly connected to the end of the storage groove 5 away from the movable groove 2. The return spring 6 is away from the inner cavity of the annealing furnace 1, so that when the temperature inside the annealing furnace 1 reaches the return spring 6 after being cooled by the furnace wall, the reduced temperature will not affect the performance of the return spring 6. A sealing plate 7 is fixedly connected to one end of the return spring 6. The bottom opening of the movable groove 2 is located at the top of the storage groove 5. One end opening of the storage groove 5 is connected to the inner cavity of the annealing furnace 1, so that the sealing plate 7 is closed to the port of the movable groove 2, preventing the leakage of fine sand in the movable groove 2.

[0042] See Figures 2 to 5The bottom of both sides of the annealing furnace 1 is provided with symmetrically distributed reciprocating grooves 8. An adjusting block 9 is movably sleeved in the reciprocating groove 8. There is a gap between the side wall of the adjusting block 9 and the side wall of the reciprocating groove 8, so that when the adjusting block 9 is subjected to the repulsive force of magnet I 901 and magnet II 191 and moves in reciprocating motion with the pressure spring II 13, the friction force on the adjusting block 9 is small, and it will not be unable to move flexibly due to the friction of the heat insulation material on the annealing furnace 1. The end of the adjusting block 9 away from the inner cavity of the annealing furnace 1 is fixedly connected to the pressure spring II 13, and the other end of the pressure spring II 13 is fixedly connected to one end of the reciprocating groove 8. The pressure spring II 13 is in a compressed state, so that the pressure spring II 13 can always apply a force to the adjusting block 9 in the direction of the sand sealing groove 15, so that the adjusting block 9 can press on the fine sand in the sand sealing groove 15 and increase the density of the fine sand. The end of the adjusting block 9 away from the pressure spring II 13 is provided with magnet I 901.

[0043] See Figures 4 to 5 Symmetrical sand sealing grooves 15 are provided on both sides of the bottom of the annealing furnace 1. The sand sealing grooves 15 are filled with fine sand. The reciprocating groove 8 is connected to one side of the sand sealing groove 15 at one end facing the inner cavity of the annealing furnace 1. One end of the adjusting block 9 is inserted into the sand sealing groove 15, and the end of the adjusting block 9 inserted into the sand sealing groove 15 is wrapped with a high-temperature resistant fiber cloth 10. The end of the high-temperature resistant fiber cloth is fixedly connected to the end of the reciprocating groove 8, so that the fine sand can be blocked by the high-temperature resistant fiber cloth 10 and will not enter the reciprocating groove 8. At the same time, the fine sand will squeeze the high-temperature resistant fiber cloth 10, so that the high-temperature resistant fiber cloth 10 carries a part of the fine sand into the gap between the reciprocating groove 8 and the adjusting block 9, which acts as a friction medium. When the spring force of the pressure spring II 13 decreases, the friction medium can hinder the movement of the adjusting block 9 and keep the adjusting block 9 pressed on the fine sand.

[0044] See Figure 1 The bottom of the inner cavity of the annealing furnace 1 is provided with a guide rail, and a trolley seat 17 is provided on the guide rail. The trolley seat 17 contacts the guide rail through rollers and moves by an existing traction device.

[0045] See Figures 1 to 7Symmetrical sealing seats 18 are fixedly connected to both sides of the trolley base 17. There is a gap between the side wall of the sealing seat 18 and the side wall of the annealing furnace, and a gap between the bottom end of the sealing seat 18 and the top end of the sand sealing groove 15, so that the trolley base 17 can have enough space to move. A sand cutter I 19 is fixedly connected to the bottom end of the sealing seat 18. The side of the sand cutter I 19 facing the adjusting block 9 is wavy. A magnet II 191 is provided at the crest of the sand cutter I 19. The magnet II 191 is located at the height of the sand cutter I 19. In the upward middle section, magnet II191 and magnet I901 repel each other. Both magnet I901 and magnet II191 are high-temperature resistant magnets. As the sand knife I19 moves forward, the wave-shaped shape and the repulsive force between magnet II191 and magnet I901 cause the adjusting block 9 to reciprocate, thereby continuously changing the size of the space between the sand knife I19 and the side wall of the sand sealing groove 15. This ensures that the fine sand always flows from the small space to the large space, improving the uniform distribution of fine sand in the entire sand sealing groove 15.

[0046] See Figures 1 to 2 The sand sealing groove 15 has an opening at one end near the furnace door. The width of the opening is the same as the maximum width of the sand knife I 19, so that the sand knife I 19 can be inserted into the sand sealing groove 15 while maintaining the seal of the sand sealing groove 15.

[0047] See Figures 1 to 3 A sand knife II 20 is fixedly connected to the end of the trolley seat 17 away from the furnace door. The sand knife II 20 is inserted into the receiving groove 5, and the thickness of the sand knife II 20 is the same as the height of the receiving groove 5, so that the sand knife II 20 can be inserted into the receiving groove 5, pushing the sealing plate 7 to move, causing the return spring 6 to compress and store energy, so that the sand knife II 20 reaches below the fine sand in the movable groove 2 to perform sealing at this point.

[0048] Example 2

[0049] Based on Example 1

[0050] Please see Figures 2 to 5Symmetrical gas supply pipes 11 are fixedly sleeved on both sides of the bottom of the annealing furnace 1. A uniformly distributed limiting pipe 12 is fixedly connected to one side of each gas supply pipe 11. A connecting rod 121 is movably sleeved inside the limiting pipe 12. One end of the connecting rod 121 is fixedly connected to the end of the adjusting block 9 away from the sand sealing groove 15. This allows the adjusting block 9 to intermittently compress the gas inside the limiting pipe 12 through the connecting rod 121 during reciprocating motion, thus intermittently pressurizing the gas in the gas supply pipe 11 against the high-temperature elastic hose 16, thereby causing the high-temperature elastic hose 16 to... 6. Intermittent expansion causes the high-temperature elastic hose to squeeze the surrounding fine sand from the bottom, enhancing the fluidity of the fine sand. Especially in the area where the sand knife I 19 has not yet reached, the high-temperature elastic hose 16 is subjected to greater external pressure and expands more, causing the fine sand to rise higher and flow from the high-level fine sand to the low-level fine sand (that is, towards the furnace mouth), thereby further improving the uniformity of the fine sand in the sand sealing groove 15. The pressure spring II 13 is wound around the limiting tube 12 and the connecting rod 121.

[0051] See Figures 4 to 5 A high-temperature elastic rubber tube 16 is fixedly connected to the bottom end of the sand sealing trough 15, and a uniformly distributed connecting pipe 14 is fixedly connected to the bottom of the gas supply pipe 11. One end of the connecting pipe 14 is connected to the high-temperature elastic rubber tube 16, so that after the gas in the gas supply pipe 11 expands due to heat, the expanded gas will be input into the high-temperature elastic rubber tube 16 through the connecting pipe 14, causing the high-temperature elastic rubber tube 16 to expand due to heat, and applying pressure to the fine sand at the bottom of the sand sealing trough 15 in all directions, thereby further increasing the density of the fine sand in the sand sealing trough 15 and improving the sealing performance of the fine sand in the sand sealing trough 15.

[0052] Example 3

[0053] Based on Example 2

[0054] The top of the pressure plate 4 is equipped with a high-temperature magnet I, and the top of the movable groove 2 is equipped with a high-temperature magnet II. The high-temperature magnet I and the high-temperature magnet II are in an attractive state. When the temperature rises, the magnetism of the high-temperature magnet I and the high-temperature magnet II decreases, causing the pressure plate 4 to press down and squeeze the fine sand below, thereby increasing the density of the fine sand.

[0055] A high-temperature magnet III is provided at the end of the regulating block 9 facing the gas pipe 11, and a high-temperature magnet IV is provided at the end of the reciprocating groove 8 near the gas pipe 11. The high-temperature magnets III and IV repel each other, so that when the regulating block 9 is pressed against the gas pipe 11, the repulsive force between the high-temperature magnets III and IV will increase. When the external force on the regulating block 9 decreases, the increased repulsive force will push the regulating block 9 to reset, thereby completing the reciprocating motion of the regulating block 9. At the same time, when the temperature rises, the magnetism of the high-temperature magnets III and IV weakens, and the force of the regulating block 9 pressing against the fine sand will decrease. At this time, the density of the fine sand is increased through friction compensation, air pressure compensation in the gas pipe 11, and pressure compensation of the high-temperature elastic hose 16.

Claims

1. A seamless steel pipe annealing material conveying device, characterized in that, The annealing furnace (1) includes a symmetrical sand sealing groove (15) at both ends of the bottom of the inner cavity of the annealing furnace (1). The sand sealing groove (15) is filled with fine sand for sealing the annealing furnace (1). A uniformly distributed reciprocating groove (8) is provided on one side of the sand sealing groove (15). A pressure spring II (13) is provided at one end of the reciprocating groove (8). An adjusting block (9) is provided at one end of the pressure spring II (13) for squeezing the fine sand. A magnet I (901) is provided at the end of the adjusting block (9) facing the sand sealing groove (15). The bottom of the annealing furnace 1 is provided with a trolley seat (17), and symmetrical sealing seats (18) are provided on both sides of the trolley seat (17) for sealing the sand sealing groove (15). The bottom end of the sealing seat (18) is provided with a sand knife I (19). The side of the sand knife I (19) facing the adjusting block (9) is wavy, and a magnet II (191) is provided at the crest of the wave. The magnet II (191) and the magnet I (901) repel each other and are used to cooperate with the magnet I (901) to drive the adjusting block (9) to reciprocate. The annealing furnace (1) is provided with a rear sealing device at one end of its bottom, which is used to cooperate with the trolley seat (17) for rear sealing; The annealing furnace (1) is equipped with gas pressure regulating devices on both sides of the bottom to compensate for the loss of elasticity of the pressure spring II (13).

2. The seamless steel pipe annealing material conveying device according to claim 1, characterized in that, The rear sealing device includes a movable groove (2) opened at one end of the annealing furnace (1), a pressure spring I (3) is provided at the top of the movable groove (2), a pressure plate (4) is provided at the bottom of the pressure spring I (3), and fine sand is filled below the pressure plate (4) to compress the fine sand and increase its density.

3. The seamless steel pipe annealing material conveying device according to claim 2, characterized in that, A storage slot (5) is provided below the movable slot (2). A return spring (6) is provided at one end of the storage slot (5). A sealing plate (7) is provided at one end of the return spring (6) to block the movable slot (2) and prevent the leakage of fine sand.

4. The seamless steel pipe annealing material conveying device according to claim 3, characterized in that, One end of the trolley seat (17) is provided with a sanding knife II (20). The sanding knife II (20) is inserted into the receiving groove (5), and the height of the sanding knife II (20) is the same as the height of the receiving groove (5). It is used to push the sealing plate (7) and complete the sealing with fine sand.

5. The seamless steel pipe annealing material conveying device according to claim 1, characterized in that, There is a gap between the side wall of the adjusting block (9) and the side wall of the reciprocating groove (8) for the rapid braking of the adjusting block (9).

6. The seamless steel pipe annealing material conveying device according to claim 1, characterized in that, The port of the reciprocating groove (8) is connected to the sand sealing groove (15), and the port is wrapped with high-temperature resistant fiber cloth (10) to hinder the flow of fine sand and form friction compensation.

7. The seamless steel pipe annealing material conveying device according to claim 1, characterized in that, The gas pressure regulating device includes symmetrical gas supply pipes (11) located on both sides of the bottom of the annealing furnace (1) for absorbing heat to form expanding gas. A uniformly distributed limiting pipe (12) is provided on one side of the gas supply pipe (11). A connecting rod (121) is provided inside the limiting pipe (12). One end of the connecting rod (121) is connected to one end of the regulating block (9) for inputting the pressure of the expanding gas into the regulating block (9).

8. A seamless steel pipe annealing material conveying device according to claim 7, characterized in that, The bottom end of the sand sealing trough (15) is provided with a high-temperature elastic rubber tube (16) to change the density of fine sand in the sand sealing trough (15). The bottom of the gas supply pipe (11) is provided with a uniformly distributed connecting pipe (14). One end of the connecting pipe (14) is connected to the high-temperature elastic rubber tube (16) to input gas into the high-temperature elastic rubber tube (16).

9. A seamless steel pipe annealing material conveying device according to claim 2, characterized in that, The top of the pressure plate (4) is provided with a high-temperature magnet I, and the top of the movable groove (2) is provided with a high-temperature magnet II. The high-temperature magnet I and the high-temperature magnet II are in a state of mutual attraction, which is used to compensate for the deformation loss of the pressure spring I (3).

10. A seamless steel pipe annealing material conveying device according to claim 8, characterized in that, The adjusting block (9) is provided with a high-temperature magnet III at one end facing the gas pipe (11), and the reciprocating groove (8) is provided with a high-temperature magnet IV at one end near the gas pipe (11). The high-temperature magnet III and the high-temperature magnet IV repel each other and are used to compensate for the deformation loss of the pressure spring II (13).

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