Seamless steel tube destressing tempering furnace capable of dissipating heat uniformly

Abstract

The utility model relates to the technical field of seamless steel tube processing, and discloses a seamless steel tube destressing tempering furnace with uniform heat dissipation, which comprises a furnace chamber and a heating furnace arranged in the furnace chamber, the heating furnace comprises a sleeve column, the sleeve column is fixed on a moving platform arranged on the side wall of the furnace chamber, and the sleeve column can be sleeved by a seamless steel tube. A supporting base is arranged below the sleeve column, an upper cover is connected to the side face of the supporting base in a hinged mode, when the supporting base and the upper cover are closed, the supporting base and the upper cover can form a cavity, the sleeve column and the seamless steel pipe can be contained in the cavity, and heat dissipation can be evenly conducted on the seamless steel pipe through cooperation of the supporting base, the upper cover and the sleeve column. The heating furnace can make full contact with the inner wall and the outer wall of the seamless steel pipe, the seamless steel pipe is evenly heated, and meanwhile the tempering efficiency is improved through the structure that the heating furnace completely covers the inner wall and the outer wall of the seamless steel pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of seamless steel pipe processing technology, especially to the even heat dissipation's seamless steel pipe stress relieving annealing furnace. BACKGROUND

[0002] The annealing treatment of the seamless steel pipe is an important heat treatment process, and the purpose is mainly to eliminate and improve the structural defects and internal stress left by the previous process, and also to prepare for the subsequent process. Through annealing, the required mechanical properties can be obtained, such as high hardness, high wear resistance, high yield strength, elastic limit and high toughness.

[0003] According to the patent network discloses a kind of steel pipe annealing furnace (authorization announcement number is: CN207944129U) described in "including: furnace body, gas circulation device and heating device located in furnace body inside;Wherein the heating device includes: several heating wires;The heating wire is suitable for interval distribution and presents cylindrical structure, to be wrapped in the pipe wall outside of steel pipe;The gas circulation device is suitable for hot gas in furnace is passed into steel pipe interior."

[0004] For the above description, the applicant believes that the following problems exist:

[0005] The utility model in the use process, since heating wire is suitable for interval distribution and presents cylindrical structure, gas circulation device is suitable for hot gas in furnace is passed into steel pipe interior can cause the uneven heating of steel pipe, the temperature of steel pipe is high, the temperature of partial part is low, influence steel pipe stress relieving effect, especially for a high standard seamless steel pipe more not to reach process standard, therefore need to improve even heat dissipation's seamless steel pipe stress relieving annealing furnace to solve the above problems. UTILITY MODEL CONTENTS

[0006] In order to overcome the uneven heating of steel pipe, the temperature of steel pipe is high, the temperature of partial part is low, and the effect of steel pipe stress relieving is influenced.

[0007] The technical scheme of the utility model is: even heat dissipation's seamless steel pipe stress relieving annealing furnace, including furnace chamber, heating furnace arranged in furnace chamber, the heating furnace includes sleeve column, the sleeve column is fixed on the moving platform of the side wall of the arranged furnace chamber, the sleeve column can be sleeved with seamless steel pipe, the bottom of the sleeve column is provided with a bottom support, the side surface of the bottom support is hingedly connected with an upper cover, when the bottom support and the upper cover are closed, the bottom support and the upper cover can form a cavity, the cavity can accommodate the sleeve column and the seamless steel pipe.

[0008] Preferably, the sleeve column, the bottom support and the upper cover cooperate to evenly heat the seamless steel pipe, achieving better stress removal effect. The heating furnace can fully contact the inner wall and the outer wall of the seamless steel pipe, making the seamless steel pipe evenly heated. At the same time, thanks to the full coverage structure of the heating furnace on the inner wall and the outer wall of the seamless steel pipe, the efficiency of annealing is improved.

[0009] Preferably, the sleeve column surface is attached with an electric heating wire, the bottom supporting surface of the sleeve column is provided with an electric heating wire, the upper cover surface of the sleeve column is provided with an electric heating wire, and the electric heating wire is made of nickel-chromium alloy. The electric heating wire made of nickel-chromium alloy can effectively prevent the electric heating wire from being fused due to heating, thereby prolonging the service life and uniformly attaching the electric heating wire on the surfaces of the sleeve column, the bottom supporting surface and the upper cover, so as to uniformly temper the seamless steel pipe.

[0010] Preferably, the upper cover is provided with a pull ring I on the side away from the sleeve column, the pull ring I is capable of passing through a metal chain, the upper cover can be turned over a° from the bottom supporting surface around the hinge by pulling the metal chain, a° < 90°, the pull ring I can be used to open the upper cover, thereby facilitating the pushing of the seamless steel pipe into the sleeve column. The reason why the turning over cannot exceed 90° is to prevent the upper cover from being unable to cover the bottom supporting surface again.

[0011] Preferably, the moving platform comprises a moving block, the upper side of the moving block is provided with a pull ring II, the pull ring II is capable of passing through a metal chain, the moving block can be pulled upward by pulling the metal chain, and only turning over the upper cover cannot well install the seamless steel pipe. The moving platform lifts the sleeve column to leave sufficient installation space below.

[0012] Preferably, the furnace chamber side wall is provided with a pulley I, the pulley I is inclined by 45° along the X-axis direction towards the pull ring II, the moving platform is provided with a pulley II above and fixed to the inner side wall of the furnace chamber, the outer side of the inner side wall where the pulley II is located is provided with a pulley III, the pulley III is above the pulley II, a channel is provided between the pulley II and the pulley III, a pulley IV is provided on the furnace chamber and opposite to the pulley III, the pull ring I, the pulley I, the pull ring II, the pulley II, the channel, the pulley III and the pulley IV are connected by a chain, the chain is made of metal material, one end of the chain away from the pull ring I is connected with a pulling device, the chain is sequentially connected with the pull ring I, the pulley I, the pull ring II, the pulley II, the channel, the pulley III and the pulley IV, thereby achieving the functions of limiting and transmitting the chain.

[0013] Preferably, one end of the chain away from the pulley IV is a fixed block I, the fixed block I cannot pass through the pull ring I, the chain is provided with a fixed block II between the pull ring II and the pulley I, the fixed block II cannot pass through the pull ring II, the upper cover can be turned over and the moving block can be moved up and down by designing the fixed block II in a manner that cannot pass through the pull ring II and designing the fixed block I in a manner that cannot pass through the pull ring I.

[0014] As preferred, the pulling device is a furnace chamber door, a handle is arranged outside the furnace chamber door, and the furnace chamber door can be pulled to move the chain by pulling the handle, the chain is moved by pulling the handle by hand, and then the upper cover is opened and the sleeve column is pulled up to facilitate installation of the seamless steel pipe on the sleeve column.

[0015] The present utility model has the advantages of:

[0016] 1. The cooperation of the bottom support, the upper cover and the sleeve column can uniformly cool the seamless steel pipe, better stress removal effect is achieved, the inner wall and the outer wall of the seamless steel pipe can be fully contacted by the heating furnace, the seamless steel pipe is uniformly heated, and the efficiency of tempering is improved due to the full coverage structure of the heating furnace on the inner wall and the outer wall of the seamless steel pipe. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the present utility model;

[0019] Figure 3 It is a schematic diagram of the cavity structure of the present utility model;

[0020] Figure 4 It is a schematic diagram of the second pull ring structure of the present utility model;

[0021] Figure 5 It is a schematic diagram of the angle structure of the bottom support and the upper cover of the present utility model;

[0022] Figure 6 It is a schematic diagram of the position of the first fixing block and the second fixing block of the present utility model.

[0023] BRIEF DESCRIPTION OF DRAWINGS: 1, furnace chamber; 11, moving platform; 111, moving block; 1111, second pull ring; 12, pulley one; 13, pulley two; 14, pulley three; 15, channel; 16, pulley four; 17, chain; 171, first fixing block; 172, second fixing block; 2, heating furnace; 21, sleeve column; 22, bottom support; 23, upper cover; 231, first pull ring; 24, cavity; 3, seamless steel pipe; 41, furnace chamber door; 411, handle. DETAILED DESCRIPTION

[0024] The present utility model will be further described in combination with the drawings and examples.

[0025] Here, the sleeve refers to inserting the pipe hole of the seamless steel pipe into the sleeve column; the inner side wall refers to the wall surface inside the furnace chamber.

[0026] Please refer to Figures 1-6The utility model provides a kind of embodiment: the seamless steel tube stress relieving annealing furnace of uniform heat dissipation, including furnace chamber 1, heating furnace 2 being arranged in furnace chamber 1, the heating furnace 2 includes sleeve column 21, the sleeve column 21 is fixed on the moving platform 11 of the furnace chamber 1 side wall being arranged, the sleeve column 21 can be equipped with seamless steel tube 3, bottom support 22 is equipped below the sleeve column 21, upper cover 23 is hingedly connected with the side of bottom support 22, when the bottom support 22 is closed with upper cover 23, the bottom support 22 can form cavity 24 with upper cover 23, the sleeve column 21 and seamless steel tube 3 can be accommodated in the cavity 24, the cooperation of bottom support 22, upper cover 23 and sleeve column 21 can evenly heat-dissipate seamless steel tube 3, reach the effect of better stress removal, by heating furnace 2 can be fully contacted with the inner wall and outer wall of seamless steel tube 3, make seamless steel tube 3 heat evenly, also benefit from the structure that heating furnace 2 is fully covered to the inner wall and outer wall of seamless steel tube 3, improve the efficiency of annealing.

[0027] Please refer to Figures 1-5In the embodiment, the sleeve column 21 is attached with electric heating wires, the bottom support 22 is provided with electric heating wires towards the surface of the sleeve column 21, the upper cover 23 is provided with electric heating wires towards the surface of the sleeve column 21, and the electric heating wires are made of nickel-chromium alloy. The electric heating wires made of nickel-chromium alloy can effectively prevent the electric heating wires from being fused due to heating, improve the service life, and the electric heating wires attached to the surfaces of the sleeve column 21, the bottom support 22 and the upper cover 23 can uniformly temper the seamless steel pipe 3. The side of the upper cover 23 away from the sleeve column 21 is provided with a pull ring 231, a metal chain can pass through the pull ring 231, and the upper cover 23 can be turned a° from the bottom support 22 around the hinge by pulling the metal chain, where a° < 90°. The pull ring 231 can be used to open the upper cover 23, so as to facilitate the pushing of the seamless steel pipe 3 into the sleeve column 21. The reason why the turning angle cannot exceed 90° is to prevent the upper cover 23 from being unable to cover the bottom support 22 again. In the embodiment, the moving platform 11 comprises a moving block 111, the upper side of the moving block 111 is provided with a pull ring 1111, a metal chain can pass through the pull ring 1111, and the moving block 111 can be pulled upwards by pulling the metal chain. Only the turning of the upper cover 23 cannot well install the seamless steel pipe 3, and the moving platform 11 lifts the sleeve column 21 to leave sufficient installation space below. The furnace chamber side wall is provided with a pulley 12, the pulley 12 is inclined by 45° towards the pull ring 1111 along the X-axis direction, the upper side of the moving platform 11 is provided with a pulley 13 fixed to the inner side wall of the furnace chamber, the outer side of the inner side wall where the pulley 13 is located is provided with a pulley 14, the pulley 14 is above the pulley 13, and a passage 15 is arranged between the pulley 13 and the pulley 14. A pulley 16 is arranged opposite to the pulley 14 on the furnace chamber, the pull ring 231, the pulley 12, the pull ring 1111, the pulley 13, the passage 15, the pulley 14 and the pulley 16 are connected by a chain 17, the chain 17 is made of metal material, and one end of the chain 17 away from the pull ring 231 is connected with a pulling device. The chain 17 is sequentially connected with the pull ring 231, the pulley 12, the pull ring 1111, the pulley 13, the passage 15, the pulley 14 and the pulley 16 to realize the functions of limiting and transmitting the chain 17.

[0028] Please refer to Figures 5-6In the embodiment, the chain 17 is fixed to the fixed block one 171 at one end away from the pulley four 16, the fixed block one 171 cannot pass through the pull ring one 231, and the fixed block two 172 is arranged between the chain 17 and the pulley one 12, the fixed block two 172 cannot pass through the pull ring two 1111. The fixed block one 171 is designed to be unable to pass through the pull ring one 231, and the fixed block two 172 is designed to be unable to pass through the pull ring two 1111, so that the upper cover 23 can be flipped and the moving block 111 can be moved up and down. The pulling device is the furnace chamber door 41, the outer side of the furnace chamber door 41 is provided with a handle 411, and the furnace chamber door 41 can be pulled to move the chain 17 by pulling the handle 411. The chain 17 is moved by pulling the handle 411, and then the upper cover 23 is opened and the sleeve column 21 is pulled up to facilitate the installation of the seamless steel pipe 3 on the sleeve column 21.

[0029] In the working process, the mechanical equipment of the previous process opens the furnace chamber door 41 through signal interaction, or the operator manually opens the furnace chamber door 41 by holding the handle 411, in the process of opening the furnace chamber door 41, the furnace chamber door 41 pulls the chain 17, the chain 17 moves along the pulley three 14 and the pulley four 16 to the furnace chamber door 41, and the chain 17 in the furnace 1 is also pulled out from the channel 15, in the furnace 1, the fixed block one 171 moves to the pull ring one 231, pulls the upper cover 23 to move to the pulley one 12, and the upper cover 23 is only flipped due to the hinged connection of the bottom support 22 and the upper cover 23, the angle of the upper cover 23 after being flipped cannot be greater than 90 degrees, in order to prevent the upper cover 23 from being unable to be closed after being flipped, after the fixed block one 171 contacts the pull ring one 231 and is pulled for a certain distance, the fixed block two 172 begins to contact the pull ring two 1111, drags the moving block 111 to move upwards, and the moving platform 11 drives the sleeve column 21 to move upwards, at this time, the mechanical arm of the previous process sends the seamless steel pipe 3 into the furnace 1 and places the seamless steel pipe 3 on the sleeve column 21 and pushes it in, at this time, the furnace chamber door 41 is closed, the chain 17 is reset, at this time, the moving platform 11 and the upper cover 23 also return to the original positions, and the bottom support 22 and the upper cover 23 form the cavity 24 to wrap the seamless steel pipe 3 inserted by the sleeve column 21, and the seamless steel pipe 3 is heated and tempered, when the tempering process is completed, the furnace chamber door 41 is opened, the chain 17 completes the above steps of opening the furnace chamber door 41, and the mechanical hand takes out the seamless steel pipe 3 from the furnace 1.

[0030] Through the above steps, the cooperation of the bottom support 22, the upper cover 23 and the sleeve column 21 can uniformly heat the seamless steel pipe 3, so that the stress removal effect is better, the heating furnace 2 can fully contact the inner wall and the outer wall of the seamless steel pipe 3, so that the seamless steel pipe 3 is uniformly heated, and at the same time, the structure that the heating furnace 2 fully covers the inner wall and the outer wall of the seamless steel pipe 3 solves the problem that the existing steel pipe is not uniformly heated, the inner part of the steel pipe is high in temperature and low in temperature, and the stress removal effect of the steel pipe is affected.

Claims

1. A stress-relief annealing furnace for seamless steel pipes with uniform heat dissipation, characterized in that: The utility model provides a kind of heating furnace, including furnace chamber (1), heating furnace (2) being arranged in furnace chamber (1), the heating furnace (2) includes sleeve column (21), the sleeve column (21) is fixed on the moving platform (11) of the side wall of arranged furnace chamber (1), the sleeve column (21) can be set with seamless steel tube (3), bottom support (22) is equipped below the sleeve column (21), upper cover (23) is hingedly connected with the side surface of bottom support (22), when bottom support (22) and upper cover (23) are closed, bottom support (22) and upper cover (23) can form cavity (24), sleeve column (21) and seamless steel tube (3) can be accommodated in the cavity (24).

2. The stress-relief annealing furnace for seamless steel pipes with uniform heat dissipation according to claim 1, characterized in that: The surface of the sleeve column (21) is attached with an electric heating wire, the surface of the bottom support (22) towards the sleeve column (21) is provided with an electric heating wire, and the surface of the upper cover (23) towards the sleeve column (21) is provided with an electric heating wire. The electric heating wire is made of nickel-chromium alloy.

3. The stress-relief annealing furnace for seamless steel pipes with uniform heat dissipation according to claim 2, characterized in that: The side of the upper cover (23) away from the sleeve column (21) is provided with a pull ring (231), a metal chain can pass through the pull ring (231), and the upper cover (23) can be flipped a° around the hinge from the bottom support (22) by pulling the metal chain, wherein a° < 90°.

4. The stress-relief annealing furnace for seamless steel pipes of uniform heat dissipation according to claim 3, characterized in that: The moving platform (11) includes a moving block (111), and the upper side of the moving block (111) is provided with a pull ring (1111). A metal chain can pass through the pull ring (1111), and the moving block (111) can be pulled upwards by pulling the metal chain.

5. The stress-relief annealing furnace for seamless steel pipes with uniform heat dissipation according to claim 4, characterized in that: The side wall of the furnace chamber (1) is provided with a pulley (12), the pulley (12) is inclined by 45° along the X-axis towards the pull ring (1111), the moving platform (11) is provided with a pulley (13) fixed to the inner side wall of the furnace chamber (1) above, the outer side of the inner side wall where the pulley (13) is located is provided with a pulley (14), the pulley (14) is above the pulley (13), a passage (15) is provided between the pulley (13) and the pulley (14), a pulley (16) is provided on the furnace chamber (1) opposite to the pulley (14), the pull ring (231), the pulley (12), the pull ring (1111), the pulley (13), the passage (15), the pulley (14), and the pulley (16) can be connected by a chain (17), the chain (17) is made of metal material, and one end of the chain (17) away from the pull ring (231) is connected with a pulling device.

6. The stress-relief annealing furnace for seamless steel pipes with uniform heat dissipation according to claim 5, characterized in that: The other end of the chain (17) away from the pulley (16) is a fixed block (171), the fixed block (171) cannot pass through the pull ring (231), and a fixed block (172) is provided between the pull ring (1111) and the pulley (12) of the chain (17), the fixed block (172) cannot pass through the pull ring (1111).

7. The stress-relief annealing furnace for seamless steel pipes with uniform heat dissipation according to claim 6, characterized in that: The pulling device is a furnace chamber door (41), the outer side of the furnace chamber door (41) is provided with a handle (411), and the furnace chamber door (41) can pull the chain (17) to move by pulling the handle (411).

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