A drying device for welding pipe production

Abstract

The invention relates to the technical field of drying devices, and specifically provides a drying device for welding pipe production, comprising a frame, a slide rail and a drying box are arranged on the frame, two sliding frames are arranged on the slide rail, rotating sleeves are rotatably arranged on the two sliding frames, multiple steel pipes can be installed between the two rotating sleeves, so that the drying box can dry multiple steel pipes at one time, and when the multiple steel pipes enter the drying box, the air outlet of the heating pipe is located in the middle of the multiple steel pipes, the two rotating sleeves drive the multiple steel pipes to rotate in a revolution and rotation mode so as to increase the utilization rate of the hot air discharged from the air outlet, and at the same time, the two rotating sleeves have a rotation speed difference, so that the multiple steel pipes between the two rotating sleeves can be tilted, so that the rotation of the multiple steel pipes can break the thermal boundary layer, improve the drying effect of the steel pipes, and the liquid inside the steel pipe in the tilted state can be discharged from both ends of the steel pipe, thereby improving the drying efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of drying devices, in particular to a drying device for producing welded pipes. Background Art

[0002] The drying device for welded pipe production refers to the equipment used to dry the moisture, grease or other liquid residues in the pipe or related process links during the welded pipe manufacturing process. Its main purpose is to ensure the surface quality of the pipe, the welding quality and the effect of the subsequent coating or treatment process.

[0003] For example, a Chinese patent discloses a steel pipe drying device, including a box body, a second telescopic rod is arranged inside the box body, the second telescopic rod is provided with two groups, a support plate is arranged above the two groups of second telescopic rods, a first drying mechanism is arranged above the support plate, a bottom plate is arranged at the bottom of the box body, a second drying mechanism is arranged on one side of the box body, the second drying mechanism includes a hot air blower arranged on the bottom plate and located on one side of the box body, the output end of the hot air blower is connected to an L-shaped conveying pipe, one end of the L-shaped conveying pipe extends into the interior of the box body and is provided with a nozzle. This scheme uses the second drying mechanism to dry the inside of the steel pipe after the first drying mechanism dries the outside of the steel pipe.

[0004] However, the above scheme can only dry a single steel pipe, which results in low drying efficiency due to low energy utilization and average drying effect on the steel pipe. Summary of the invention

[0005] Based on this, it is necessary to provide a drying device for welded pipe production to address the problems of low drying efficiency and general drying effect of current drying devices.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A drying device for producing welded pipes, comprising:

[0008] A frame (100), wherein a drying box (110) and a slide rail (150) are arranged on the frame (100), wherein the slide rail (150) passes through the drying box (110), and wherein two sliding racks (200) are arranged on the slide rail (150), wherein the two sliding racks (200) can carry a plurality of steel pipes (300), and the two sliding racks (200) drive the plurality of steel pipes (300) to enter the drying box (110);

[0009] A rotating sleeve (210), the rotating sleeve (210) being rotatably connected to the sliding frame (200), a plurality of supporting balls (230) being arranged on the two rotating sleeves (210) along the circumferential direction, the plurality of supporting balls (230) respectively supporting two ends of a plurality of steel pipes (300), the rotating sleeve (210) driving the plurality of supporting balls (230) to revolve around the axis of the rotating sleeve (210) and the plurality of supporting balls (230) to rotate around their own axis, and the supporting balls (230) driving the steel pipes (300) to rotate;

[0010] A heating pipe (130), wherein the heating pipe (130) is located in the drying box (110); when the plurality of steel pipes (300) enter the drying box (110), the heating pipe (130) is located in the middle of the plurality of steel pipes (300).

[0011] Furthermore, a circular groove (201) is provided on the sliding frame (200), a first tooth (202) is provided on the inner wall of the circular groove (201), the outer periphery of the rotating sleeve (210) has a second tooth (211), a gear (240) is fixedly provided on the outer periphery of the rotating shaft (231) of the supporting ball (230), the gear (240) is meshed with the first tooth (202) and the second tooth (211), an annular groove (250) is provided at the bottom of the circular groove (201), the rotating shaft (231) of the supporting ball (230) is located in the annular groove (250) and can slide along the annular groove (250).

[0012] Furthermore, the outer circumference of the supporting ball (230) has a plurality of grooves (233), and the plurality of grooves (233) are distributed along the axial direction of the steel pipe (300).

[0013] Furthermore, the supporting ball (230) is elastic.

[0014] Furthermore, a driving assembly is provided on the sliding frame (200), and the driving assembly is capable of driving the rotating sleeve (210) to rotate.

[0015] Furthermore, the driving assembly comprises a first driving motor (260) and a second driving motor (270), the first driving motor (260) and the second driving motor (270) being respectively fixedly arranged on two sliding frames (200) and respectively driving two rotating sleeves (210), the first driving motor (260) and the second driving motor (270) being able to drive a plurality of steel pipes (300) to tilt when there is a speed difference between the first driving motor (260) and the second driving motor (270), the first driving motor (260) and the second driving motor (270) having a first state and a second state, the first state and the second state being switched back and forth within a preset time;

[0016] When in the first state, the rotation speed of the first drive motor (260) is greater than the rotation speed of the second drive motor (270);

[0017] When in the second state, the rotation speed of the second drive motor (270) is greater than the rotation speed of the first drive motor (260).

[0018] Furthermore, a heat recovery component is provided in the drying box (110), and the heat recovery component is capable of recovering, storing or reusing the heat near the top of the drying box (110).

[0019] Furthermore, a driving wheel (203) is provided at the connection between the sliding frame (200) and the sliding rail (150), and the driving wheel (203) rotates to drive the sliding frame (200) to slide on the sliding rail (150).

[0020] Furthermore, there are at least three steel pipes (300) between the two rotating sleeves (210).

[0021] Furthermore, an observation port (120) is provided on the side wall of the drying box (110).

[0022] The beneficial effects of the present invention are:

[0023] The present invention provides two rotating sleeves, and multiple steel pipes can be installed between the two rotating sleeves, so that the drying box can dry multiple steel pipes at one time, and when the multiple steel pipes enter the drying box, the air outlet of the heating pipe is located in the middle of the multiple steel pipes, and the two rotating sleeves drive the multiple steel pipes to rotate in a revolution and rotation manner to increase the utilization rate of the hot air discharged from the air outlet, thereby improving the drying effect of the steel pipes.

[0024] The present invention provides elastic supporting balls so that the supporting balls can support steel pipes with different diameters, thereby improving the application range of the drying device for welded pipe production.

[0025] The present invention sets a first drive motor and a second drive motor with different rotational speeds, so that the two rotating sleeves have a rotational speed difference, and the multiple steel pipes between the two rotating sleeves are continuously switched from a parallel state to an inclined state, so that the multiple steel pipes can break the thermal boundary layer, further improving the drying effect of the steel pipes, and the liquid inside the steel pipes in the inclined state can be discharged from both ends of the steel pipes, thereby improving the drying efficiency.

[0026] The present invention provides a heat recovery component, which recovers and reuses the heat at the top of the drying box, thereby reducing the energy consumption of the heating equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A schematic diagram of the structure of a drying device for producing welded pipes provided in one embodiment of the present invention;

[0028] Figure 2 for Figure 1 A front view of a drying device for producing welded pipes provided in one embodiment;

[0029] Figure 3 for Figure 1 A left side view of a drying device for producing welded pipes provided in an embodiment;

[0030] Figure 4 for Figure 3 A cross-sectional view of a drying device for producing a welded pipe along AA provided in an embodiment;

[0031] Figure 5 for Figure 4 A partial enlarged view of a drying device X for producing a welded pipe provided in an embodiment;

[0032] Figure 6 An exploded view of a sliding frame of a drying device for producing welded pipes provided in one embodiment of the present invention;

[0033] Figure 7 A cross-sectional view of a sliding frame of a drying device for producing welded pipes provided in one embodiment of the present invention;

[0034] Figure 8 A schematic diagram of a plurality of steel pipes in parallel in a drying device for producing welded pipes provided in one embodiment of the present invention;

[0035] Fig. 9 for Figure 8 A cross-sectional view of a drying device for producing a welded pipe along line BB provided in an embodiment;

[0036] Fig.10 for Fig. 9 A partial enlarged view of part Y of a drying device for producing welded pipes provided in an embodiment;

[0037] Fig.11 A schematic diagram of the tilted state of multiple steel pipes in a drying device for welded pipe production provided by an embodiment of the present invention;

[0038] Fig.12 for Fig.11 A cross-sectional view of a drying device for producing a welded pipe along CC provided in an embodiment;

[0039] Fig.13 for Fig.12 A partial enlarged view of part Z of a drying device for producing welded pipes provided in an embodiment.

[0040] in:

[0041] 100, rack; 110, drying box; 120, observation port; 130, heating pipe; 131, air outlet; 140, recovery pump; 150, slide rail;

[0042] 200, sliding frame; 201, circular groove; 202, first tooth; 203, driving wheel; 210, rotating sleeve; 211, second tooth; 212, gear ring; 213, connecting ring; 220, annular groove; 230, supporting ball; 231, rotating shaft; 232, stop block; 233, groove; 240, gear; 250, annular slide groove; 251, retaining ring; 260, first driving motor; 270, second driving motor;

[0043] 300. Steel pipe. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] Refer to the following Figure 1-Figure 13 A drying device for producing welded pipes provided by the present invention will be described.

[0048] A drying device for welding pipe production, suitable for drying welding pipes, comprises a frame 100, a slide rail 150 and a drying box 110 are arranged on the frame 100, two sliding racks 200 are arranged on the slide rail 150, the two sliding racks 200 can slide on the slide rail 150, a plurality of steel pipes 300 can be carried between the two sliding racks 200, the two sliding racks 200 drive the plurality of steel pipes 300 to move, and the drying box 110 is arranged on the slide rail 150. In the prior art, the drying box 110 is generally filled with heating gas, but the heating gas is unevenly distributed in the drying box 110, and the temperature of the upper part of the drying box 110 is slightly higher than that of the lower part. The temperature of the steel pipes 300 in the drying box 110 is reduced, thereby reducing the drying effect of the steel pipes 300 in the drying box 110. Therefore, a heating pipe 130 is provided in the drying box 110 of the present invention. A heating device (not shown in the figure) is connected to one end of the heating pipe 130. The heating device passes heating gas into the heating pipe 130. When the two sliding racks 200 transport the steel pipes 300 into the drying box 110, the other end of the heating pipe 130 is located in the drying box 110 and the air outlet 131 of the heating pipe 130 is just located in the middle of the steel pipes 300. The heating pipe 130 discharges hot air to heat the steel pipes 300 and then dry the moisture on the surface of the steel pipes 300.

[0049] In order to achieve a better drying effect for the multiple steel pipes 300, a rotating sleeve 210 is provided on each sliding frame 200. The rotating sleeve 210 is rotatably connected to the sliding frame 200 through a connecting ring 213. A plurality of supporting balls 230 are circumferentially provided on the outer periphery of the rotating sleeve 210. The number of supporting balls 230 corresponds to the number of steel pipes 300. The supporting balls 230 on the two rotating sleeves 210 respectively support the two ends of the steel pipe 300. Specifically, the supporting balls 230 are inserted into the inside of the steel pipe 300 to support the steel pipe 300. When the rotating sleeve 210 rotates, it can drive the plurality of supporting balls 230 to revolve around the axis of the rotating sleeve 210. At the same time, the supporting balls 230 also rotate around their own axes. Because the supporting balls 230 connect the two ends of the steel pipe 300, The supporting ball 230 can drive the steel pipe 300 to revolve and rotate, and because the air outlet 131 of the heating pipe 130 is located in the middle of the multiple steel pipes 300, the heating gas is closer to the multiple steel pipes 300 after being blown out from the air outlet 131 of the heating pipe 130, thereby improving the energy utilization rate and making the heating gas have a better heating effect on the multiple steel pipes 300. When the multiple steel pipes 300 rotate and rotate, they are evenly heated by the heating gas located in the middle of the multiple steel pipes 300, so that the steel pipes 300 can be evenly dried, thereby improving the drying effect of the steel pipes 300, and multiple steel pipes 300 are arranged between the two rotating sleeves 210, so that the two sliding racks 200 can dry multiple steel pipes 300 at the same time when entering the drying box 110, thereby improving the drying efficiency.

[0050] It can be understood that the heating tube 130 passes through the axis of the rotating sleeve 210 on the sliding frame 200 and is located in the middle position of the multiple steel pipes 300. Compared with the drying equipment in the prior art, the drying device for welded pipe production of the present invention has higher drying efficiency and better drying effect.

[0051] Specifically, in order to realize the function of the rotating sleeve 210 driving the plurality of steel pipes 300 to both rotate and revolve, a circular groove 201 is provided on the sliding frame 200. Figure 6 and Figure 7 As shown, first teeth 202 are evenly arranged on the inner wall of the circular groove 201, a through hole is opened at the bottom center of the circular groove 201, and the rotating sleeve 210 is rotatably arranged in the through hole, and second teeth 211 are evenly arranged on the outer periphery of the rotating sleeve 210, and an annular groove 220 is formed between a plurality of second teeth 211 and a plurality of first teeth 202, and a gear 240 is coaxially and fixedly arranged on the outer periphery of the rotating shaft 231 of the supporting ball 230, and the gear 240 is located in the annular groove 220, and the gear 240 is respectively meshed with the first teeth 202 and the second teeth 211.

[0052] An annular groove 250 is provided at the bottom of the circular groove 201, and the rotating shaft 231 of the supporting ball 230 is located in the annular groove 250. To ensure that the rotating shaft 231 does not separate from the annular groove 250, the annular groove 250 is set as an annular groove 250 with a retaining ring 251, and a limit block 232 is fixedly provided on the end of the rotating shaft 231 away from the supporting ball 230. The limit block 232 prevents the rotating shaft 231 from separating from the annular groove 250. When the rotating sleeve 210 rotates, the second tooth 211 drives the gear 240 of the supporting ball 230 to rotate, and the gear 240 drives the supporting ball 230 to rotate while moving along the annular groove 250. This structure is similar to that of a planetary gear. The supporting ball 230 further drives the steel pipe 300 to revolve around its own axis while revolving around the axis of the rotating sleeve 210, thereby improving the drying effect of the steel pipe 300.

[0053] In a further embodiment, the surface of the support ball 230 has a groove 233, and the groove 233 is distributed along the axial direction of the steel pipe 300. When the support ball 230 is located at both ends of the steel pipe 300, the outer peripheral surface of the support ball 230 abuts against the inside of the steel pipe 300. At this time, the groove 233 can prevent the inside of the steel pipe 300 from being blocked. When the steel pipe 300 is dried, the gas inside the steel pipe 300 expands and is discharged from the groove 233, avoiding excessive air pressure inside the steel pipe 300. At the same time, it can also facilitate the heating gas outside the steel pipe 300 to enter the inside of the steel pipe 300.

[0054] In a further embodiment, the support ball 230 is elastic, and the elastic support ball 230 can adapt to a variety of steel pipes 300 with different diameters, thereby increasing the application range of the drying device for welded pipe production and enhancing its practicability.

[0055] It should be noted that the support ball 230 is elastic and can enter the steel pipe 300 of different diameters to play a supporting role, and the groove 233 on the surface of the support ball 230 will not be blocked due to elastic deformation when the support ball 230 enters the steel pipe 300, thereby ensuring that the support ball 230 can still connect the gas inside the steel pipe 300 with the outside when supporting steel pipes 300 of different diameters.

[0056] Specifically, in the embodiment of the present invention, a driving assembly is further provided on the sliding frame 200, and the driving assembly can drive the rotating sleeve 210 to rotate. When the driving assembly drives the two rotating sleeves 210 to rotate, the two rotating sleeves 210 can generate a rotation speed difference, and the two rotating sleeves 210 rotate relatively. When the two rotating sleeves 210 rotate relatively, the multiple steel pipes 300 thereon can be tilted, thereby breaking the thermal boundary layer originally formed by the multiple steel pipes 300. The thermal boundary layer is formed as follows:

[0057] Since the original multiple steel pipes 300 are in a parallel state and are driven to rotate by the rotating sleeve 210, the heating gas is in the middle of the multiple steel pipes 300. Then, when the multiple steel pipes 300 rotate, the part close to the heating pipe 130 will form a thermal boundary layer. The existence of the thermal boundary layer is not conducive to the diffusion of the internal gas to the outside, which will cause the temperature of the multiple steel pipes 300 with a larger rotation radius to be lower than the temperature of the smaller radius, which is not conducive to uniform drying of the steel pipes 300.

[0058] It should be noted that by creating a rotation speed difference between the two rotating sleeves 210 so that the multiple steel pipes 300 no longer rotate in a parallel state but in an inclined state, the advantage of such a setting is that the thermal boundary layer formed during the original parallel rotation can be broken, so that the internal heated gas can be better diffused outward, so that the temperatures of the multiple steel pipes 300 at different positions of the rotation radius are as close as possible, thereby improving the uniformity of the drying of the steel pipes 300.

[0059] More specifically, the driving assembly of the present invention includes a first driving motor 260 and a second driving motor 270, which are respectively fixed to two sliding frames 200. When the first driving motor 260 and the second driving motor 270 rotate, they can respectively drive the two rotating sleeves 210 to rotate. In order to facilitate the first driving motor 260 and the second driving motor 270 to respectively drive the two rotating sleeves 210 to rotate, as shown in FIG. Figure 6 and Figure 7As shown, a gear ring 212 is provided on one end face of the rotating sleeve 210 away from the second tooth 211 , and the interior of the gear ring 212 is meshed with the rotating shaft 231 of the first drive motor 260 ; similarly, the connection between the second drive motor 270 and the rotating sleeve 210 is the same as the connection between the first drive motor 260 and the rotating sleeve 210 .

[0060] It should be noted that the rotation speeds of the first drive motor 260 and the second drive motor 270 are different, but the rotation directions are the same. The first drive motor 260 and the second drive motor 270 have two states, and the two states are continuously switched back and forth within a preset time (the interval time can be set according to the rotation speeds of the first drive motor 260 and the second drive motor 270. If the speed difference between the two drive motors is large, the interval time can be appropriately reduced. If the speed difference between the two drive motors is small, the interval time can be increased).

[0061] When in the first state, the rotation speed of the first drive motor 260 is greater than the rotation speed of the second drive motor 270. At this time, the rotating sleeve 210 driven by the first drive motor 260 will rotate relative to the rotating sleeve 210 driven by the second drive motor 270 along the rotation direction, so that the original plurality of mutually parallel steel pipes 300 are tilted (the tilted state can be compared to the state of twisting a twist, but the degree is much weaker than twisting a twist). The state before the tilt is as shown in FIG. Figure 8 As shown, the state after tilting is Fig.11 As shown, the middle positions of the multiple steel pipes 300 will be close to each other, so as to be closer to the air outlet 131 of the heating pipe 130; however, when the middle positions of the multiple steel pipes 300 are about to contact the heating pipe 130, they are switched to the second state. The rotation speed of the first drive motor 260 in the second state is slowed down, that is, the rotation speed of the second drive motor 270 is greater than the rotation speed of the first drive motor 260. When the speed of the second drive motor 270 increases, the multiple inclined steel pipes 300 will gradually return to the parallel state, and then gradually tilt in the opposite direction after returning to the parallel state. The inclination state of the steel pipe 300 at this time is opposite to the inclination direction in the first state, and constantly switching between the first state and the second state can continuously change the rotation state of the steel pipe 300, so that the multiple steel pipes 300 can break the thermal boundary layer, so that the heat distribution is more uniform.

[0062] It should also be noted that the speed control of the first drive motor 260 and the second drive motor 270 can be regulated by a PLC program or a computer program.

[0063] It can be understood that when the steel pipe 300 after production is transported to the drying box 110 after liquid cooling, liquid will inevitably exist inside the steel pipe 300. When multiple steel pipes 300 gradually change from a parallel state to an inclined state, coupled with the rotation and revolution of the steel pipe 300, the liquid inside the steel pipe 300 will be moved to the two ends of the steel pipe 300 by centrifugal force, and grooves 233 are provided on the support balls 230 at both ends of the steel pipe 300. Therefore, the liquid inside the steel pipe 300 can be discharged from the grooves 233. After the liquid is discharged, the drying time of the steel pipe 300 can be reduced, thereby further improving the drying efficiency of the steel pipe 300.

[0064] It should be noted that the rotation speed of the first drive motor 260 and the second drive motor 270 is adjustable. When the rotation speed of the first drive motor 260 and the second drive motor 270 is faster, the speed of liquid discharge from the steel pipe 300 can be increased. The rotation speed of the first drive motor 260 and the second drive motor 270 can be adjusted as needed, and no specific limitation is made here.

[0065] In a further embodiment, a heat recovery component is provided in the drying box 110. The heat recovery component can absorb the hot air located near the top of the drying box 110, and store or reuse the absorbed hot air. It can be understood that a large amount of hot air will float near the top of the drying box 110. Therefore, setting the heat recovery component near the top of the drying box 110 can better absorb heat.

[0066] Specifically, the heat recovery component includes a plurality of recovery pumps 140 and a heat storage device (not shown in the figure). The recovery pump 140 is located at the top of the drying box 110 and is used to extract the hot air at the top. The extracted hot air is stored in the heat storage device and can be reused, for example, the stored hot air is re-introduced into the heating pipe 130 or the stored hot air is introduced into the heating device, thereby reducing the energy consumption of the heating device. Of course, the heat recovery component is not limited to the above structure. For example, a heat pipe, a heat conducting plate or other heat conducting structures can also be used to conduct the heat of the hot air to the heat storage device, which is not specifically limited here.

[0067] In a further embodiment, a driving wheel 203 is provided at the connection between the sliding frame 200 and the slide rail 150, and the driving wheel 203 drives the sliding frame 200 to move on the slide rail 150. The driving wheels 203 on the two sliding frames 200 move synchronously to transport the two sliding frames 200 and the multiple steel pipes 300 between the sliding frames 200 into the drying box 110.

[0068] It should be noted that when multiple steel pipes 300 are installed on multiple support balls 230, that is, when multiple steel pipes 300 are installed between two sliding frames 200, one of the driving wheels 203 can be stopped from rotating, while the other driving wheel 203 drives the sliding frame 200 to move on the slide rail 150. When the distance between the two sliding frames 200 is slightly greater than the length of the steel pipe 300, it stops. At this time, multiple steel pipes 300 are installed on the support balls 230. After the installation is completed, the two driving wheels 203 rotate synchronously to drive the sliding frame 200 and the multiple steel pipes 300 between them into the drying box 110.

[0069] In a further embodiment, the number of steel pipes 300 between the two sliding racks 200 is at least three, so that the hot air exhausted from the heating tube 130 can be fully utilized. Of course, the number cannot be too large, as too many numbers will affect the drying efficiency of the steel pipes 300. Therefore, in order to balance the heating efficiency of the steel pipes 300, the number of steel pipes 300 between the two sliding racks 200 can be set according to demand, and no specific limitation is made here.

[0070] In a further embodiment, the drying box 110 of the present invention is provided with a plurality of observation ports 120, which can conveniently observe the situation inside the drying box 110. If an abnormal situation is found inside the drying box 110, the power supply can be cut off in time to avoid safety accidents.

[0071] The specific working process of a drying device for producing welded pipes provided by the present invention is described in combination with the above embodiments:

[0072] Installation of steel pipe 300:

[0073] The driving wheel 203 near the drying box 110 is started, and the driving wheel 203 drives the sliding frame 200 connected thereto to move toward the drying box 110. When the distance between the two sliding frames 200 is slightly greater than the length of the steel pipe 300, the rotation of the driving wheel 203 is stopped, and the two ends of the multiple steel pipes 300 are respectively installed on the supporting balls 230 by manual or mechanical arms.

[0074] start up:

[0075] The heating device (not shown in the figure) and the recovery pump 140 are started. The heating device introduces hot air into the heating tube 130, and the hot air is discharged through the other end of the heating tube 130. The two driving wheels 203, the first driving motor 260 and the second driving motor 270 are started. The two driving wheels 203 drive the two sliding frames 200 to move on the slide rail 150, and the two sliding frames 200 move into the drying box 110. The first driving motor 260 and the second driving motor 270 respectively drive the rotating sleeves 210 on the two sliding frames 200 to rotate. When the two sliding frames 200 enter the drying box 110 and the middle position of the multiple steel pipes 300 corresponds to the air outlet 131 of the heating tube 130, the two sliding frames 200 stop. The state switching of the first driving motor 260 and the second driving motor 270 is controlled by a PLC program or a computer program.

[0076] drying:

[0077] When the first driving motor 260 and the second driving motor 270 are in the first state, the rotation speed of the first driving motor 260 is greater than the rotation speed of the second driving motor 270, and the two rotating sleeves 210 have a speed difference so that the multiple steel pipes 300 gradually tilt from a mutually parallel state. The specific state changes are as follows: Figures 8 to 13 As shown, the rotation of the two rotating sleeves 210 drives the multiple steel pipes 300 to rotate around the axis of the rotating sleeve 210, and the multiple steel pipes 300 also rotate around their own axes. When the middle of the multiple steel pipes 300 is about to approach the air outlet 131 of the heating tube 130, it switches to the second state. In the second state, the rotation speed of the second drive motor 270 is greater than the rotation of the first drive motor 260. The multiple steel pipes 300 between the two rotating sleeves 210 gradually recover from the inclined state to the parallel state and then begin to tilt in the opposite direction. After continuous switching between the first state and the second state, the state of the steel pipe 300 is constantly changed, thereby improving the drying effect of the steel pipe 300. At the same time, since the steel pipe 300 is in a tilted state, the liquid inside the steel pipe 300 will be discharged from the grooves 233 of the support balls 230 on both ends of the steel pipe 300 due to the centrifugal force, which can improve the drying efficiency of the steel pipe 300.

[0078] Heat recovery:

[0079] The recovery pump 140 continuously operates to extract the hot air located at the top of the drying box 110, and the extracted hot air is stored in the heat storage device. The hot air in the heat storage device can be reused, thereby reducing energy consumption.

[0080] Drying completed:

[0081] After drying is completed, the two driving wheels 203 are started, and the two driving wheels 203 drive the two sliding racks 200 to move on the slide rails 150 to leave the drying box 110, and the workers or mechanical arms take down the dried steel pipes 300 and store them.

[0082] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A drying device for welded pipe production, characterized in that: include: A frame (100), wherein a drying box (110) and a slide rail (150) are arranged on the frame (100), wherein the slide rail (150) passes through the drying box (110), and wherein two sliding racks (200) are arranged on the slide rail (150), wherein the two sliding racks (200) can carry a plurality of steel pipes (300), and the two sliding racks (200) drive the plurality of steel pipes (300) to enter the drying box (110); A rotating sleeve (210), the rotating sleeve (210) being rotatably connected to the sliding frame (200), a plurality of supporting balls (230) being arranged on the two rotating sleeves (210) along the circumferential direction, the plurality of supporting balls (230) respectively supporting two ends of a plurality of steel pipes (300), the rotating sleeve (210) driving the plurality of supporting balls (230) to revolve around the axis of the rotating sleeve (210) and the plurality of supporting balls (230) to rotate around their own axis, and the supporting balls (230) driving the steel pipes (300) to rotate; A heating pipe (130), wherein the heating pipe (130) is located in the drying box (110); when the plurality of steel pipes (300) enter the drying box (110), the heating pipe (130) is located in the middle of the plurality of steel pipes (300).

2. The drying device for welded pipe production according to claim 1, characterized in that: The sliding frame (200) is provided with a circular groove (201), the inner wall of the circular groove (201) is provided with a first tooth (202), the outer periphery of the rotating sleeve (210) is provided with a second tooth (211), a gear (240) is fixedly provided on the outer periphery of the rotating shaft (231) of the supporting ball (230), the gear (240) is meshed with the first tooth (202) and the second tooth (211), an annular groove (250) is provided at the bottom of the circular groove (201), the rotating shaft (231) of the supporting ball (230) is located in the annular groove (250) and can slide along the annular groove (250).

3. The drying device for welded pipe production according to claim 2, characterized in that: The outer circumference of the supporting ball (230) is provided with a plurality of grooves (233), and the plurality of grooves (233) are distributed along the axial direction of the steel pipe (300).

4. The drying device for welded pipe production according to claim 2, characterized in that: The supporting ball (230) has elasticity.

5. The drying device for welded pipe production according to claim 1, characterized in that: A driving assembly is provided on the sliding frame (200), and the driving assembly is capable of driving the rotating sleeve (210) to rotate.

6. The drying device for producing welded pipes according to claim 5, characterized in that: The driving assembly comprises a first driving motor (260) and a second driving motor (270), the first driving motor (260) and the second driving motor (270) being respectively fixedly arranged on two sliding frames (200) and respectively driving two rotating sleeves (210), the first driving motor (260) and the second driving motor (270) being able to drive a plurality of steel pipes (300) to tilt when there is a speed difference between the first driving motor (260) and the second driving motor (270), the first driving motor (260) and the second driving motor (270) having a first state and a second state, the first state and the second state being switched back and forth within a preset time; When in the first state, the rotation speed of the first drive motor (260) is greater than the rotation speed of the second drive motor (270); When in the second state, the rotation speed of the second drive motor (270) is greater than the rotation speed of the first drive motor (260).

7. The drying device for welded pipe production according to claim 1, characterized in that: A heat recovery component is provided in the drying box (110), and the heat recovery component is capable of recovering, storing or reusing heat near the top of the drying box (110).

8. The drying device for welded pipe production according to claim 1, characterized in that: A driving wheel (203) is provided at the connection between the sliding frame (200) and the sliding rail (150), and the driving wheel (203) rotates to drive the sliding frame (200) to slide on the sliding rail (150).

9. The drying device for welded pipe production according to claim 1, characterized in that: There are at least three steel pipes (300) between the two rotating sleeves (210).

10. The drying device for welded pipe production according to claim 1, characterized in that: An observation port (120) is provided on the side wall of the drying box (110).

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