A heat recovery device for nylon air-changing yarn production

Abstract

The present invention discloses a heat recovery device for nylon air-changing yarn production, which relates to the technical field of heat recovery in nylon production, including a recovery drum, wherein the recovery drum is arranged on the top of the ground, a serpentine tube is arranged inside the recovery drum, and the serpentine tube is used to guide high-temperature gas, a water inlet is provided on the top of the recovery drum, and a water outlet is provided at the bottom of the recovery drum, a support frame is fixedly installed on the top of the recovery drum, a servo motor is fixedly installed on the top of the support frame, and a screw rod is fixedly installed on the output end of the servo motor; a support rod, wherein the support rod is fixedly installed on the top of the recovery drum; a support groove, wherein the support groove is provided on the circumferential surface of the support rod; when the lifting plate and the support frame reinforce the serpentine tube, the serpentine tube exposed outside the recovery drum is simultaneously insulated, and the reinforcement of the serpentine tube can ensure the stable position of the serpentine tube, avoid unevenness of the serpentine tube connection due to deformation, and thus improve the heat recovery efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of heat recovery in nylon production, and in particular to a heat recovery device for nylon air-changing yarn production. Background Art

[0002] The heat recovery device for nylon air-converted yarn production usually consists of a recovery drum, a serpentine pipe, a driving device and a heat preservation device.

[0003] The patent with patent announcement number CN215261314U relates to a heat recovery device for nylon air-changing yarn production, including a processing equipment body, a heat-conducting cover is arranged above the processing equipment body, and a flow guide cover is connected to the top of the heat-conducting cover. The top of the flow guide cover is connected to the input end of the exhaust fan through a pipe, and the output end of the exhaust fan is connected to the air inlet on the top of the filter box through a pipe. The air outlet on one side of the filter box is connected to an air supply pipe, and one end of the air supply pipe is connected to one end of a serpentine pipe. The serpentine pipe is arranged in a heat recovery box, and a water supply pipe is connected to the top of the heat recovery box. The heat in the processing equipment body is conveniently extracted through the heat-conducting cover and the flow guide cover, and then enters the heat recovery box after filtering treatment to heat the water in the box. The heated water is discharged for use, and the cooled gas is adsorbed and then discharged for use, thereby recovering heat.

[0004] In the above patent, the heat in the processing equipment body is conveniently extracted through the heat-conducting cover and the flow guide cover, and then enters the heat recovery box after filtering to heat the water in the box. The heated water is discharged for use, and the cooled gas is adsorbed and then discharged for use, thereby recovering heat. However, it is difficult to prevent the serpentine tube from being accidentally collided. The serpentine tube plays an important role in guiding the flow in the heat recovery process. If the serpentine tube is not sufficiently reinforced due to collision, the inner wall of the serpentine tube connection will be uneven, affecting the heat recovery effect. In addition, the serpentine tube without an insulation layer will cause heat loss, thereby reducing the efficiency of heat recovery. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a heat recovery device for nylon air-varying yarn production, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a heat recovery device for nylon air-changing yarn production, comprising a recovery drum, the recovery drum is arranged on the top of the ground, a serpentine tube is arranged inside the recovery drum, the serpentine tube is used to guide the high-temperature gas, a water inlet is provided on the top of the recovery drum, a water outlet is provided on the bottom of the recovery drum, a support frame is fixedly installed on the top of the support frame, a servo motor is fixedly installed on the top of the support frame, and a screw rod is fixedly installed on the output end of the servo motor; a support rod, the support rod is fixedly installed on the top of the recovery drum; a support groove, the support A groove is provided on the circumferential surface of the support rod; a lifting plate, the lifting plate is slidably installed on the circumferential surface of the support rod, the lifting plate is threadedly connected to the screw rod, and the support rod is used to support the lifting plate; a limit rod, the limit rod slides through the front and rear walls of the top of the lifting plate, and the limit rod is used to limit the lifting plate; a limit ring, the limit ring is fixedly installed on the front side of the limit rod; a limit spring, the limit spring is arranged between the limit ring and the lifting plate, and the limit spring is used to drive the limit ring to move horizontally, and the lifting plate and the support frame reinforce the serpentine tube while insulating the serpentine tube exposed outside the recovery tube.

[0007] According to the above technical solution, the rear side of the limit rod is set as an arc surface, the limit rod conflicts with the support rod, and liquid is set inside the recovery cylinder. The lifting plate cannot move upward, thereby preventing the lifting plate from causing excessive lifting of the serpentine tube.

[0008] According to the above technical solution, the serpentine tube passes through the top of the recovery cylinder, the serpentine tube passes through the circumferential surface of the recovery cylinder, and the bottom of the inner wall of the support frame is set as an arc surface. By setting the bottom of the inner wall of the support frame as an arc surface, the thermal insulation effect of the serpentine tube can be improved, and the lifting plate and the bottom of the support frame are both made of glass wool.

[0009] The cam is secured to the upper and lower ends of the cam, and the cam is secured to the lower ends of the cam, and the cam is secured to the lower ends of the cam.

[0010] According to the above technical solution, an elastic telescopic rod is fixedly installed on the right side of the arc frame, a connecting hole is opened at the free end of the elastic telescopic rod, a telescopic stick is fixedly installed on the circumferential surface of the elastic telescopic rod, and a rubber ring is provided between the free end of the elastic telescopic rod and the fixed end of the elastic telescopic rod. When the free end of the elastic telescopic rod moves to the left, it will limit the lifting plate, thereby reminding the staff that there is a leakage point between the serpentine pipe and the interface pipe when disassembling and repairing the serpentine pipe and the interface pipe.

[0011] According to the above technical solution, the arc frame is connected to the inside of the elastic telescopic rod, a rubber ring 2 is provided on the inner wall of the arc frame, the rack 1 is engaged with the gear, and the rack 2 is engaged with the gear. The rubber ring 2 can improve the sealing between the arc frame and the curved frame, and both the rubber ring 2 and the rubber ring 1 are made of fluororubber.

[0012] According to the above technical solution, the descaling assembly includes a decomposition frame, a spring rod, a grafting plate, a liquid inlet and a liquid outlet. The decomposition frame is fixedly installed on the top of the recovery tube, the spring rod is fixedly passed through the top of the recovery tube, the grafting plate slides through the top of the recovery tube, the liquid inlet is opened at the fixed end of the spring rod, and the liquid outlet is opened at the fixed end of the spring rod. Concentrated phosphoric acid solvent is provided inside the decomposition frame, and the rated concentrated phosphoric acid solvent inside the spring rod enters the interior of the recovery tube through the liquid outlet and decomposes the scale attached to the surface of the serpentine tube.

[0013] According to the above technical solution, a knocking plate is fixedly installed at the bottom of the grafting plate, and the bottom of the knocking plate is set to an arc shape. A sealing ring is provided between the free end of the spring rod and the fixed end of the spring rod. The sealing ring can improve the sealing between the free end of the spring rod and the fixed end of the spring rod. The knocking plate moves downward to knock on the uneven hot and cold areas of the serpentine tube to generate vibration, thereby improving the decomposition effect of scale attached to the surface of the serpentine tube.

[0014] According to the above technical solution, the spring rod passes through the bottom of the decomposition frame, the grafting plate passes through the bottom of the decomposition frame, and a spring 1 is arranged between the decomposition frame and the grafting plate. The grafting plate moves downward to pull the spring 1, and the spring 1 is deformed and accumulates force due to the pulling of the grafting plate. After the curved frame is out of contact with the grafting plate, the grafting plate can be driven to reset by the spring 1. A rubber valve is arranged inside the spring rod, and the rubber valve is made of fluororubber.

[0015] The present invention provides a heat recovery device for nylon air-changing yarn production. It has the following beneficial effects:

[0016] The heat recovery device for nylon air-changing yarn production moves the lifting plate upward and cooperates with the support frame to reinforce the serpentine tube. The reinforcement of the serpentine tube can ensure the stability of the position of the serpentine tube, avoid unevenness of the serpentine tube connection due to collision deformation, and thus improve the heat recovery efficiency. In addition, when the lifting plate and the support frame reinforce the serpentine tube, the serpentine tube exposed outside the recovery cylinder is insulated at the same time. The lifting plate fits and insulates the serpentine tube, making the heat recovery process more stable and ensuring the stability of heat recovery.

[0017] The heat recovery device for nylon air-variable yarn production prevents the lifting plate from excessively lifting the serpentine tube by preventing the lifting plate from moving upward. By limiting the excessive lifting of the tube, the angular deviation of the serpentine tube during the docking process can be prevented, thereby extending the service life of the serpentine tube.

[0018] (3) The heat recovery device for the production of nylon air-changing yarn moves the curved frame downward to contact the arc frame and perform secondary sealing on the connection between the serpentine tube and the interface pipe. The secondary sealing process can ensure the airtightness of the serpentine tube and further avoid heat loss.

[0019] (4) The heat recovery device for nylon air-changing yarn production limits the lifting plate by moving the free end of the elastic telescopic rod to the left, thereby prompting the staff to find out that there is a leak between the serpentine tube and the interface pipe. The staff can quickly identify the leak location and repair it, thereby avoiding heat loss or equipment damage caused by leakage during long-term operation.

[0020] (5) In the heat recovery device for the production of nylon air-changing yarn, the rated concentrated phosphoric acid solvent inside the spring rod enters the recovery cylinder through the liquid outlet and decomposes the scale attached to the surface of the serpentine tube. The scale on the surface of the serpentine tube can be removed by the cleaning effect of the concentrated phosphoric acid solvent, thereby restoring the thermal conductivity of the serpentine tube and improving the overall heat recovery efficiency.

[0021] (6) The heat recovery device for the production of nylon air-changing yarn generates vibration by moving the knocking plate downward to knock on the hot and cold uneven parts of the serpentine tube, thereby improving the decomposition effect of scale attached to the surface of the serpentine tube. By applying vibration, the scale at the hot and cold uneven parts of the serpentine tube can be further decomposed and loosened, so that the surface of the serpentine tube remains clean, thereby reducing the corrosion of the serpentine tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the half-section structure of the serpentine tube of the present invention;

[0024] Figure 3 This is a schematic diagram of the recovery drum and water inlet position structure of the present invention;

[0025] Figure 4 For the present invention Figure 3 A schematic diagram of the structure of part A in the middle;

[0026] Figure 5 This is a schematic diagram of the position structure of the serpentine tube and the lifting plate of the present invention;

[0027] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure of part B;

[0028] Figure 7 This is a schematic diagram of the position structure of the arc frame and the curved frame of the present invention;

[0029] Figure 8 This is a schematic diagram of a half-section structure of an exploded frame of the present invention;

[0030] Figure 9 This is a schematic diagram of a half-section structure of the elastic telescopic rod of the present invention.

[0031] In the figure: 1. Recovery cylinder; 2. Serpentine tube; 3. Water inlet; 4. Water outlet; 5. Support frame; 6. Servo motor; 7. Screw; 8. Support rod; 9. Support groove; 10. Lifting plate; 11. Limiting ring; 12. Limiting rod; 13. Limiting spring; 141. Cross slot; 142. U-shaped rod; 143. Gear; 144. Arc frame; 145. Rack 1; 146. Curved frame; 147. Rack 2; 148. Elastic telescopic rod; 149. Telescopic stick; 1410. Connecting hole; 151. Decomposition frame; 152. Spring rod; 153. Grafting plate; 154. Liquid inlet; 155. Liquid outlet; 156. Knocking plate. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1-8, one embodiment of the present invention is: a heat recovery device for nylon air-changing yarn production, comprising a recovery drum 1, the recovery drum 1 is arranged on the top of the ground, a serpentine tube 2 is arranged inside the recovery drum 1, the serpentine tube 2 is used to guide the high-temperature gas, a water inlet 3 is provided on the top of the recovery drum 1, a water outlet 4 is provided at the bottom of the recovery drum 1, a support frame 5 is fixedly installed on the top of the support frame 5, a servo motor 6 is fixedly installed on the top of the support frame 5, and a screw rod 7 is fixedly installed on the output end of the servo motor 6; a support rod 8, the support rod 8 is fixedly installed on the top of the recovery drum 1; a support groove 9, the support groove 9 is opened on the circumferential surface of the support rod 8; a lifting plate 10, the lifting plate 10 is slidably installed on the circumferential surface of the support rod 8, and the lifting plate 10 and the screw rod 7 are fixedly installed. Threaded connection, the support rod 8 is used to support the lifting plate 10; the limit rod 12, the limit rod 12 slides through the front and rear walls of the top of the lifting plate 10, and the limit rod 12 is used to limit the lifting plate 10; the limit ring 11, the limit ring 11 is fixedly installed on the front side of the limit rod 12; the limit spring 13, the limit spring 13 is arranged between the limit ring 11 and the lifting plate 10, and the limit spring 13 is used to drive the limit ring 11 to move horizontally. The reinforcement of the serpentine tube 2 can ensure the stable position of the serpentine tube 2, avoid the unevenness of the serpentine tube connection due to deformation, and thus improve the heat recovery efficiency. The serpentine tube 2 is fitted and insulated by the lifting plate 10, making the heat recovery process more stable and ensuring the stability of heat recovery.

[0034] The rear side of the limit rod 12 is set to an arc surface, and the limit rod 12 conflicts with the support rod 8. Liquid is set inside the recovery cylinder 1. By limiting the excessive lifting of the serpentine tube 2, the angle deviation of the serpentine tube 2 during the docking process can be prevented, thereby extending the service life of the serpentine tube 2.

[0035] The serpentine tube 2 passes through the top of the recovery tube 1, the serpentine tube 2 passes through the circumference of the recovery tube 1, the bottom of the inner wall of the support frame 5 is set to an arc surface, and the lifting plate 10 and the bottom of the support frame 5 are both made of glass wool.

[0036] When the embodiment is working: when the serpentine tube 2 is connected to the interface pipe, the servo motor 6 drives the screw rod 7 to rotate, and the screw rod 7 rotates to drive the lifting plate 10 to move upward, and the lifting plate 10 moves upward to cooperate with the support frame 5 to reinforce the serpentine tube 2, and the lifting plate 10 and the support frame 5 reinforce the serpentine tube 2 while simultaneously keeping the serpentine tube 2 exposed outside the recovery cylinder 1 warm. At the same time, the lifting plate 10 moves upward to drive the limit rod 12 to move upward, and the limit rod 12 moves upward. The movement drives the limiting ring 11 to move upward, and the limiting rod 12 moves upward and gradually aligns with the supporting groove 9. After the supporting groove 9 is aligned with the limiting rod 12, the limiting ring 11 moves backward and resets under the elastic force of the limiting spring 13. The limiting ring 11 moves backward and resets, driving the limiting rod 12 to move backward. The limiting rod 12 moves backward and contacts the supporting groove 9 and limits the lifting plate 10. The lifting plate 10 is limited by the limiting rod 12 and cannot continue to move upward. The lifting plate The cam 11 is pressed against the cylinder 14 and the cam 12 is pulled back to the cylinder 14, and the cam 12 is pulled back to the cylinder 14. When the cam 11 is pressed against the cylinder 14, the cam 12 is pulled back to the cylinder 14, and the cam 12 is pulled back to the cylinder 14. When the cam 11 is pressed against the cylinder 14, the cam 12 is pulled back to the cylinder 14, and the cam 12 is pulled back to the cylinder 14.

[0037] See also Figures 1-9On the basis of the above embodiment, in another embodiment of the present invention, a sealing assembly for improving the sealing performance of the serpentine tube 2 is provided on the inner wall of the support frame 5, and a descaling assembly is provided on the top of the recovery drum 1. The sealing assembly includes a cross groove 141, a U-shaped rod 142, a gear 143, an arc frame 144, a rack 145, a curved frame 146 and a rack 2 147. The cross groove 141 is provided on the inner wall of the support frame 5, the U-shaped rod 142 is fixedly mounted on the inner wall of the support frame 5, the gear 143 is rotatably mounted on the circumferential surface of the U-shaped rod 142, and the arc frame 14 4 is slidably mounted on the inner wall of the cross slot 141, the rack 145 is fixedly mounted on the inner wall of the rear side of the arc frame 144, the curved frame 146 is slidably mounted on the inner wall of the cross slot 141, and the rack 2 147 is fixedly mounted on the inner wall of the rear side of the curved frame 146. A torsion spring is provided between the U-shaped rod 142 and the gear 143 to support the gear 143. The secondary sealing treatment can ensure the airtightness of the serpentine tube 2 and further avoid heat loss. The interface pipe is used to introduce the high-temperature gas generated by the production of nylon air-changing yarn into the interior of the serpentine tube 2.

[0038] An elastic telescopic rod 148 is fixedly installed on the right side of the arc frame 144, and a connecting hole 1410 is opened at the free end of the elastic telescopic rod 148. A telescopic stick 149 is fixedly installed on the solid circumferential surface of the elastic telescopic rod 148. A rubber ring is provided between the free end of the elastic telescopic rod 148 and the fixed end of the elastic telescopic rod 148. The staff can quickly identify the leakage location and repair or adjust it, thereby avoiding heat loss or equipment damage due to leakage during long-term operation.

[0039] The arc frame 144 is internally connected to the elastic telescopic rod 148. A rubber ring 2 is provided on the inner wall of the arc frame 144. The rack 145 is engaged with the gear 143, and the rack 2 147 is engaged with the gear 143. The rubber ring 2 can improve the sealing between the arc frame 144 and the curved frame 146. Both the rubber ring 2 and the rubber ring 1 are made of fluororubber.

[0040] The descaling assembly includes a decomposition frame 151, a spring rod 152, a grafting plate 153, a liquid inlet 154 and a liquid outlet 155. The decomposition frame 151 is fixedly installed on the top of the recovery tube 1, the spring rod 152 is fixedly passed through the top of the recovery tube 1, the grafting plate 153 slides through the top of the recovery tube 1, the liquid inlet 154 is opened at the fixed end of the spring rod 152, and the liquid outlet 155 is opened at the fixed end of the spring rod 152. Concentrated phosphoric acid solvent is provided inside the decomposition frame 151. The cleaning effect of the concentrated phosphoric acid solvent can remove scale on the surface of the serpentine tube 2, thereby restoring the thermal conductivity of the serpentine tube 2 and improving the overall heat recovery efficiency.

[0041] A knocking plate 156 is fixedly installed at the bottom of the grafting plate 153. The bottom of the knocking plate 156 is set to an arc shape. A sealing ring is provided between the free end of the spring rod 152 and the fixed end of the spring rod 152. The sealing ring can improve the sealing between the free end of the spring rod 152 and the fixed end of the spring rod 152. By applying vibration, the scale at the hot and cold uneven parts of the serpentine tube 2 can be further decomposed and loosened, so that the surface of the serpentine tube 2 remains clean, thereby reducing the corrosion of the serpentine tube 2.

[0042] The spring rod 152 passes through the bottom of the decomposition frame 151, and the grafting plate 153 passes through the bottom of the decomposition frame 151. A spring 1 is provided between the decomposition frame 151 and the grafting plate 153. The grafting plate 153 moves downward to pull the spring 1. The spring 1 is deformed and stores force by the pull of the grafting plate 153. After the curved frame 146 is out of contact with the grafting plate 153, the grafting plate 153 can be driven to reset by the spring 1. A rubber valve is provided inside the spring rod 152, and the rubber valve is made of fluororubber.

[0043] When this embodiment is working: the lifting plate 10 moves upward to contact the arc frame 144 and squeeze the arc frame 144. The arc frame 144 is squeezed by the lifting plate 10 and moves upward to contact the connection point of the serpentine tube 2 and the interface pipe. At the same time, the arc frame 144 moves upward to drive the rack 145 to move upward. The rack 145 moves upward to squeeze the gear 143. The gear 143 is squeezed by the rack 145 to rotate clockwise. The gear 143 rotates clockwise to squeeze the rack 2 147. The rack 2 147 is squeezed by the gear 143 and moves downward. The rack 2 147 moves downward to drive the curved frame 146 to move downward. The curved frame 146 moves downward to contact the arc frame 144 and perform a secondary seal on the connection between the serpentine tube 2 and the interface pipe. If gas leaks between the serpentine tube 2 and the interface pipe, the leaked gas will fill the arc frame 144 and the curved frame 146. The gas filling the interior of the arc frame 144 enters the interior of the elastic telescopic rod 148 through the fixed end of the elastic telescopic rod 148, and the gas entering the interior of the elastic telescopic rod 148 squeezes the free end of the elastic telescopic rod 148, and the free end of the elastic telescopic rod 148 is squeezed to the left by the gas inside the elastic telescopic rod 148, and the free end of the elastic telescopic rod 148 moves to the left so that the connecting hole 1410 is aligned with the free end of the telescopic stick 149. After the free end of the telescopic stick 149 is aligned with the connecting hole 1410, the free end of the telescopic stick 149 moves upward under the action of its own elastic force and contacts the connecting hole 1410 and limits the free end of the elastic telescopic rod 148, and the free end of the elastic telescopic rod 148 moves to the left to limit the lifting plate 10, thereby reminding the staff that there is a leakage point between the serpentine tube 2 and the interface pipe when disassembling and repairing the serpentine tube 2 and the interface pipe.

[0044] The curved frame 146 moves downward and contacts the grafting plate 153 and squeezes the top of the grafting plate 153. The grafting plate 153 moves downward under the squeezing of the curved frame 146. The grafting plate 153 moves downward and contacts the free end of the spring rod 152 and squeezes the free end of the spring rod 152. The free end of the spring rod 152 moves downward under the squeezing of the grafting plate 153. The free end of the spring rod 152 moves downward and contacts the liquid inlet hole 154 and isolates the decomposition frame 151 from the spring rod 152. At the same time, the free end of the spring rod 152 moves downward to squeeze the rated concentrated phosphoric acid solvent inside the spring rod 152. The concentrated phosphoric acid solvent inside the spring rod 152 is squeezed by the free end of the spring rod 152, exerting pressure on the rubber valve inside the spring rod 152. The rubber valve inside the spring rod 152 is released from the squeeze force and the seal on the liquid outlet hole 155 is released. After the seal of the liquid outlet hole 155 is released, the rated concentrated phosphoric acid solvent inside the spring rod 152 enters the recovery cylinder 1 through the liquid outlet hole 155 and decomposes the scale attached to the surface of the serpentine tube 2. At the same time, the downward movement of the grafting plate 153 drives the knocking plate 156 to move downward. The knocking plate 156 moves downward and knocks on the uneven hot and cold parts of the serpentine tube 2 to generate vibration, thereby improving the decomposition effect of the scale attached to the surface of the serpentine tube 2.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A heat recovery device for nylon air-changing yarn production, characterized in that: The invention comprises a recovery tube (1), wherein the recovery tube (1) is arranged on the top of the ground, a serpentine tube (2) is arranged inside the recovery tube (1), and the serpentine tube (2) is used to guide the high-temperature gas. A water inlet (3) is provided on the top of the recovery tube (1), and a water outlet (4) is provided on the bottom of the recovery tube (1). A support frame (5) is fixedly installed on the top of the recovery tube (1), a servo motor (6) is fixedly installed on the top of the support frame (5), and a screw rod (7) is fixedly installed on the output end of the servo motor (6); A support rod (8), wherein the support rod (8) is fixedly mounted on the top of the recovery drum (1); A support groove (9), wherein the support groove (9) is provided on the circumferential surface of the support rod (8); A lifting plate (10), wherein the lifting plate (10) is slidably mounted on the circumferential surface of the support rod (8), the lifting plate (10) is threadedly connected to the screw rod (7), and the support rod (8) is used to support the lifting plate (10); A limiting rod (12), wherein the limiting rod (12) slides through the front and rear walls of the top of the lifting plate (10), and the limiting rod (12) is used to limit the lifting plate (10); A limiting ring (11), wherein the limiting ring (11) is fixedly mounted on the front side of the limiting rod (12); A limit spring (13), wherein the limit spring (13) is arranged between the limit ring (11) and the lifting plate (10), and the limit spring (13) is used to drive the limit ring (11) to move horizontally; The rear side of the limiting rod (12) is configured as an arc surface, the limiting rod (12) contacts the support rod (8), liquid is provided inside the recovery cylinder (1), a sealing component for improving the sealing performance of the serpentine tube (2) is provided on the inner wall of the support frame (5), and a descaling component is provided on the top of the recovery cylinder (1); The sealing assembly includes a cross groove (141), a U-shaped rod (142), a gear (143), an arc frame (144), a rack 1 (145), a curved frame (146) and a rack 2 (147), wherein the cross groove (141) is provided on the inner wall of the support frame (5), the U-shaped rod (142) is fixedly mounted on the inner wall of the support frame (5), the gear (143) is rotatably mounted on the circumferential surface of the U-shaped rod (142), the arc frame (144) is slidably mounted on the inner wall of the cross groove (141), the rack 1 (145) is fixedly mounted on the rear inner wall of the arc frame (144), the curved frame (146) is slidably mounted on the inner wall of the cross groove (141), the rack 2 (147) is fixedly mounted on the rear inner wall of the curved frame (146), and a torsion spring is provided between the U-shaped rod (142) and the gear (143).

2. The heat recovery device for producing nylon air-changing yarn according to claim 1, characterized in that: The serpentine tube (2) passes through the top of the recovery cylinder (1), the serpentine tube (2) passes through the circumferential surface of the recovery cylinder (1), and the bottom of the inner wall of the support frame (5) is configured as an arc surface.

3. The heat recovery device for producing nylon air-changing yarn according to claim 2, characterized in that: An elastic telescopic rod (148) is fixedly installed on the right side of the arc frame (144), a connecting hole (1410) is opened at the free end of the elastic telescopic rod (148), a telescopic stick (149) is fixedly installed on the solid circumferential surface of the elastic telescopic rod (148), and a rubber ring is provided between the free end of the elastic telescopic rod (148) and the fixed end of the elastic telescopic rod (148).

4. The heat recovery device for producing nylon air-changing yarn according to claim 3, characterized in that: The arc frame (144) is connected to the interior of the elastic telescopic rod (148), and a second rubber ring is provided on the inner wall of the arc frame (144). The first rack (145) is engaged with the gear (143), and the second rack (147) is engaged with the gear (143).

5. The heat recovery device for producing nylon air-changing yarn according to claim 4, characterized in that: The descaling assembly comprises a decomposition frame (151), a spring rod (152), a grafting plate (153), a liquid inlet hole (154) and a liquid outlet hole (155); the decomposition frame (151) is fixedly mounted on the top of the recovery cylinder (1); the spring rod (152) is fixedly passed through the top of the recovery cylinder (1); the grafting plate (153) is slidably passed through the top of the recovery cylinder (1); the liquid inlet hole (154) is provided at the fixed end of the spring rod (152); the liquid outlet hole (155) is provided at the fixed end of the spring rod (152); and concentrated phosphoric acid solvent is provided inside the decomposition frame (151).

6. The heat recovery device for producing nylon air-changing yarn according to claim 5, characterized in that: A knocking plate (156) is fixedly mounted on the bottom of the grafting plate (153), and the bottom of the knocking plate (156) is arranged in an arc shape. A sealing ring is arranged between the free end of the spring rod (152) and the fixed end of the spring rod (152).

7. The heat recovery device for producing nylon air-changing yarn according to claim 6, characterized in that: The spring rod (152) passes through the bottom of the decomposition frame (151), the grafting plate (153) passes through the bottom of the decomposition frame (151), a spring 1 is provided between the decomposition frame (151) and the grafting plate (153), and a rubber valve is provided inside the spring rod (152).

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