Round tube quenching slow cooling discharging device

Abstract

The utility model provides a circular tube quenching and slow-cooling discharging device which comprises a friction conveying mechanism, the slow-cooling discharging mechanism is arranged behind the friction conveying mechanism in the conveying direction of the round pipes and comprises a slow-cooling rack, and a plurality of sets of slow-cooling transmission rod bearing seats which are arranged in parallel in the conveying direction of the round pipes at intervals are installed on the slow-cooling rack; the four slow cooling transmission rods are installed on the slow cooling machine frame in parallel at intervals through slow cooling transmission rod bearing seats, each slow cooling transmission rod is provided with a slow cooling friction wheel, and the slow cooling machine frame is provided with a polishing slow cooling device and a jacking discharging device. The unloading buffering mechanism is arranged behind the slow cooling unloading mechanism in the conveying direction of the round pipes; and the round pipe stacking swing frame is mounted on one side of the unloading buffering mechanism. According to the circular tube quenching slow-cooling discharging device, the surfaces of double tempered circular tubes can be polished, and stable propelling cooling and discharging of the two circular tubes can be achieved at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of round tube processing equipment, in particular to a round tube quenching and slow cooling unloading device. Background Art

[0002] During the actual processing, high-strength round tubes need to undergo surface quenching, tempering and other operations to enhance the surface strength of the round tubes. After quenching, tempering and water cooling, the high-strength round tubes also need to be polished on the surface of the tempered round tubes, and the round tubes need to be slowly advanced so that the round tubes are gradually cooled before being unloaded. In the prior art, the patent CN115198078A previously applied for by the applicant discloses a continuous induction quenching heat treatment equipment for automobile bumpers, which can adapt to the processing requirements of automatic loading, conveying, speed separation, straight forward conveying, quenching, tempering, cooling and unloading of automobile bumpers of different models and sizes, and can achieve stable straight forward conveying of automobile bumpers, preventing deviation and slipping during quenching and tempering. However, this patent cannot polish the surface of the round tubes, nor can it achieve automatic unloading of double round tubes. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model proposes a round tube quenching and slow cooling unloading device, which can grind the surface of the double round tubes after tempering and simultaneously achieve stable forward cooling and unloading of the two round tubes.

[0004] The utility model provides a round tube quenching slow cooling unloading device, comprising: a friction conveying mechanism; a slow cooling unloading mechanism arranged behind the friction conveying mechanism along the conveying direction of the round tube, the slow cooling unloading mechanism comprising a slow cooling frame, the slow cooling frame being provided with a plurality of slow cooling transmission rod bearing seats arranged in parallel and at intervals along the conveying direction of the round tube, four slow cooling transmission rods being arranged in parallel and at intervals on the slow cooling frame through the slow cooling transmission rod bearing seats, each slow cooling transmission rod being provided with a slow cooling friction wheel, wherein the slow cooling friction wheels on the first slow cooling transmission rod and the second slow cooling transmission rod are fitted together to form a first slow cooling friction conveying channel for the round tube, and the slow cooling friction wheels on the third slow cooling transmission rod and the fourth slow cooling transmission rod are fitted together to form a second slow cooling friction conveying channel for the round tube, the slow cooling frame being provided with a polishing slow cooling device, the polishing slow cooling device comprising four supporting guide rods distributed along a square and arranged on the slow cooling frame, the supporting guide rods A top plate is installed on the top, and the movable mounting plate is connected to the supporting guide rod through a guide sleeve, and two groups of upper polishing rollers are installed at the bottom of the movable mounting plate, and the two groups of upper polishing rollers are respectively located above the first slow cooling friction conveying channel and the second slow cooling friction conveying channel. The two groups of upper polishing rollers are connected by an upper polishing roller transmission rod, and one end of the upper polishing roller transmission rod is connected to the upper polishing roller driving motor, and the lower polishing roller mounting seat is installed on the slow cooling frame, and the two groups of lower polishing rollers are installed on the lower polishing roller mounting seat and are respectively located below the first slow cooling friction conveying channel and the second slow cooling friction conveying channel. The slow cooling frame is also equipped with an upper unloading device, and the upper unloading device is installed below the first slow cooling friction conveying channel and the second slow cooling friction conveying channel; a unloading cache mechanism is arranged behind the slow cooling unloading mechanism along the conveying direction of the round tube; and a round tube stacking and swing rack is installed on one side of the unloading cache mechanism.

[0005] The upper polishing roller is driven by the upper polishing roller to rotate, and the upper polishing roller is driven by the lower polishing roller to rotate, and the surface of the round tube in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel is polished through the cooperation between the upper polishing roller and the lower polishing roller, and the round tube is slowly pushed forward in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel, and the round tube is slowly cooled during the forward movement. After the round tube enters the unloading buffer mechanism, the round tube in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel is pushed up and unloaded onto the round tube stacking rack for storage through the top unloading device installed in the slow cooling unloading mechanism and the unloading buffer mechanism.

[0006] Preferably, the friction conveying mechanism includes a conveying frame, on which a plurality of conveying transmission rod bearing seats arranged in parallel and spaced apart are installed along the conveying direction of the round tube, and four conveying transmission rods are installed in parallel and spaced apart on the conveying frame through the conveying transmission rod bearing seats, and each conveying transmission rod is installed with a conveying friction wheel, wherein the conveying friction wheels on the first conveying transmission rod and the second conveying transmission rod are fitted together to form a first conveying friction conveying channel for the round tube, and the conveying friction wheels on the third conveying transmission rod and the fourth conveying transmission rod are fitted together to form a second conveying friction conveying channel for the round tube, and the four conveying transmission rods and the four slow cooling transmission rods on the slow cooling unloading mechanism are respectively connected via couplings, and a pressing roller assembly is correspondingly installed above the first conveying friction conveying channel and the second conveying friction conveying channel. During actual operation, the four conveying transmission rods are connected to the driving mechanism at the front end, and the four conveying transmission rods are driven to rotate by the driving mechanism. When the friction wheels on the first conveying transmission rod and the second conveying transmission rod rotate, they cooperate with the pressing roller assembly to make the round tube located in the first friction conveying channel move forward stably and uniformly. At the same time, when the friction wheels on the third conveying transmission rod and the fourth conveying transmission rod rotate, they cooperate with the pressing roller assembly to make the round tube located in the second friction conveying channel move forward stably and uniformly.

[0007] Preferably, the press roller assembly includes a press cylinder, which is mounted on a frame and arranged vertically downwardly facing the first friction conveying channel or the second friction conveying channel. A press roller mounting frame is mounted on the telescopic shaft of the press cylinder. Four universal wheel mounting posts arranged downwardly in a square pattern are mounted on the press roller mounting frame. A universal roller is mounted at the bottom of each universal wheel mounting post, and a circular tube shield is mounted between two longitudinally distributed universal rollers. During actual operation, the press cylinder drives the press roller mounting frame downward, so that the universal rollers mounted on the four universal wheel mounting posts arranged downwardly in a square pattern come into contact with the top of the circular tube in the first friction conveying channel and the second friction conveying channel. Then, in conjunction with the rotation of the friction wheel, the circular tube can be continuously and stably moved forward under the action of friction.

[0008] Preferably, the unloading and caching mechanism includes a caching rack, on which are mounted a plurality of support rollers spaced side by side along the conveying direction of the round tubes, a top unloading device mounted below the support rollers on the caching rack, and a guide plate biased toward the round tube stacking and swinging rack mounted on the end edge of the caching rack. During operation, under the propulsion of the slow cooling unloading mechanism, the front end of the round tube moves onto the support rollers, and then the top unloading device in the unloading and caching mechanism cooperates with the top unloading device in the slow cooling unloading mechanism to lift the round tube and guide it onto the round tube stacking and swinging rack via the guide plate for placement and storage.

[0009] Preferably, the upper unloading device includes a cylinder mounting seat, which is fixed on a slow cooling rack or a cache rack, a first unloading cylinder mounting inclined plate is mounted on the cylinder mounting seat, the first unloading cylinder is mounted obliquely upward on the first unloading cylinder mounting inclined plate and is located below the first slow cooling friction conveying channel, the first round tube head is mounted on the telescopic shaft of the first unloading cylinder, the second unloading cylinder is mounted vertically upward on the cylinder mounting seat and is located below the second slow cooling friction conveying channel, the second round tube head is mounted on the telescopic shaft of the second unloading cylinder, and the top surface of the second round tube head is set as an inclined surface. During actual operation, because the first unloading cylinder is arranged to be tilted upward, the first unloading cylinder can lift the round tube in the first slow cooling friction conveying channel and tilt it toward one side of the round tube stacking swing rack when pushing up, and then introduce it into the round tube stacking swing rack through the guide plate for placement and storage; similarly, the second unloading cylinder lifts the round tube in the first slow cooling friction conveying channel through the second round tube head and tilts it toward one side of the round tube stacking swing rack, and then introduces it into the round tube stacking swing rack through the guide plate for placement and storage.

[0010] Preferably, an adjustment handwheel is mounted at the center of the top plate of the polishing and slow cooling device, with a screw mounted at the end of the adjustment handwheel. The bottom of the screw is connected to the movable mounting plate via a screw pair. During operation, the handwheel can be adjusted to adjust the working height of the movable mounting plate, thereby adjusting the spacing between the upper and lower polishing rollers to meet the requirements of polishing different round tube surfaces.

[0011] The beneficial effects of the round tube quenching and slow cooling unloading device provided by the utility model are: the round tube quenching and slow cooling unloading device is reasonably designed and simple in structure, can realize the grinding treatment of the surface of the double round tubes after tempering, and simultaneously realize the stable pushing cooling and unloading of the two round tubes. During actual operation, the friction conveying mechanism conveys the round tube to the first slow cooling friction conveying channel and the second slow cooling friction conveying channel of the slow cooling unloading mechanism, and respectively enters the polishing channel composed of the lower polishing roller and the upper polishing roller in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel, and the upper polishing roller driving motor is used to drive the upper polishing roller to rotate, and the cooperation between the upper polishing roller and the lower polishing roller is used to realize the polishing of the surface of the round tube in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel, and slowly pushes the round tube forward in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel, and realizes slow cooling of the round tube during the forward movement. When the round tube enters the unloading buffer mechanism, the round tube in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel is pushed up and unloaded onto the round tube stacking rack for placement and storage through the top unloading device installed in the slow cooling unloading mechanism and the unloading buffer mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of the three-dimensional structure of the utility model.

[0013] Figure 2 It is a rear view of the three-dimensional structure of the utility model.

[0014] Figure 3 It is a three-dimensional structural diagram of the friction conveying mechanism in the utility model.

[0015] Figure 4 It is a three-dimensional structural diagram of the material pressing roller assembly of the utility model.

[0016] Figure 5 It is a front view of the three-dimensional structure of the slow cooling and unloading mechanism in the utility model.

[0017] Figure 6 It is a rear view of the three-dimensional structure of the polishing slow cooling device in the utility model.

[0018] Figure 7 It is a three-dimensional structural diagram of the upper unloading device in the utility model.

[0019] Figure 8 It is a three-dimensional structural diagram of the unloading buffer mechanism in the utility model.

[0020] In the figure: 1. Friction conveying mechanism; 11. Conveying frame; 12. Conveying transmission rod; 13. Conveying transmission rod bearing seat; 14. Conveying friction wheel; 15. Pressing roller assembly; 151. Pressing cylinder; 152. Pressing roller mounting frame; 153. Universal wheel mounting column; 154. Universal roller; 155. Round tube shield; 2. Slow cooling unloading mechanism; 21. Slow cooling frame; 22. Slow cooling transmission rod bearing seat; 23. Slow cooling transmission rod; 24. Slow cooling friction wheel; 25. Coupling; 26. Polishing and slow cooling device; 261. Guide rod; 262. Top plate; 263. Movable mounting plate; 264. Guide sleeve; 2 65. Adjusting screw; 266. Adjusting hand wheel; 267. Upper polishing roller drive motor; 268. Upper polishing roller; 269. Upper polishing roller transmission rod; 2610. Lower polishing roller mounting seat; 2611. Lower polishing roller; 27. Upper unloading device; 271. Cylinder mounting seat; 272. First unloading cylinder mounting inclined plate; 273. First unloading cylinder; 274. First round tube jack; 275. Second unloading cylinder; 276. Second round tube jack; 28. Unloading guide plate; 3. Unloading buffer mechanism; 31. Buffer rack; 32. Support roller; 33. Guide plate; 4. Round tube stacking rack. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary persons in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment: A round tube quenching and slow cooling unloading device.

[0023] Reference Figures 1 to 8 As shown, a round tube quenching and slow cooling unloading device comprises:

[0024] The friction conveying mechanism 1 includes a conveying frame 11, on which multiple groups of conveying transmission rod bearing seats 13 arranged in parallel and spaced apart are installed along the conveying direction of the round tube. Four conveying transmission rods 12 are installed in parallel and spaced apart on the conveying frame 11 through the conveying transmission rod bearing seats 13. Each conveying transmission rod 12 is installed with a conveying friction wheel 14, wherein the conveying friction wheels 14 on the first conveying transmission rod 12 and the second conveying transmission rod 12 are fitted together to form a first conveying friction conveying channel for the round tube, and the conveying friction wheels 14 on the third conveying transmission rod 12 and the fourth conveying transmission rod 12 are fitted together to form a second conveying friction conveying channel for the round tube, and the four conveying transmission rods 12 and the four slow cooling transmission rods 23 on the slow cooling unloading mechanism 2 are respectively connected through couplings 25, and a pressing roller assembly 15 is correspondingly installed above the first conveying friction conveying channel and the second conveying friction conveying channel. During actual operation, the four conveying transmission rods 12 are connected to the driving mechanism at the front end, and the four conveying transmission rods 12 are driven to rotate by the driving mechanism. When the conveying friction wheels 14 on the first conveying transmission rod 12 and the second conveying transmission rod 12 rotate, they cooperate with the pressing roller assembly 15 to make the round tube located in the first friction conveying channel move forward stably and uniformly. At the same time, when the conveying friction wheels 14 on the third conveying transmission rod 12 and the fourth conveying transmission rod 12 rotate, they cooperate with the pressing roller assembly 15 to make the round tube located in the second friction conveying channel move forward stably and uniformly. The press roller assembly 15 includes a press cylinder 151, which is mounted on a frame and arranged vertically downwardly facing the first friction conveying channel or the second friction conveying channel. A press roller mounting frame 152 is mounted on the telescopic shaft of the press cylinder 151. Four universal wheel mounting posts 153 arranged in a square and downwardly disposed are mounted on the press roller mounting frame 152. A universal roller 154 is mounted at the bottom of each universal wheel mounting post 153. A round tube shield 155 is mounted between two longitudinally distributed universal rollers 154. During actual operation, the press cylinder 151 drives the press roller mounting frame 152 to press down, so that the universal rollers 154 mounted on the four universal wheel mounting posts 153 arranged in a square and downwardly disposed are in contact with the top of the round tube in the first friction conveying channel and the second friction conveying channel, and then cooperates with the rotation of the conveying friction wheel 14 to enable the round tube to move forward continuously and stably under the action of friction.

[0025] The slow cooling unloading mechanism 2 is arranged behind the friction conveying mechanism 1 along the conveying direction of the round tube. The slow cooling unloading mechanism 2 includes a slow cooling frame 21. The slow cooling frame 21 is equipped with multiple groups of slow cooling transmission rod bearing seats 22 arranged in parallel and spaced along the conveying direction of the round tube. Four slow cooling transmission rods 23 are installed in parallel and spaced on the slow cooling frame 21 through the slow cooling transmission rod bearing seats 22. A slow cooling friction wheel 24 is installed on each slow cooling transmission rod 23, wherein the slow cooling friction wheel 24 on the first slow cooling transmission rod 23 and the second slow cooling transmission rod 23 are in contact with each other. After that, the first slow cooling friction conveying channel for the round tube is formed. After the third slow cooling transmission rod 23 and the slow cooling friction wheel 24 on the fourth slow cooling transmission rod 23 are fitted together, the second slow cooling friction conveying channel for the round tube is formed. A polishing slow cooling device 26 is installed on the slow cooling frame 21. The polishing slow cooling device 26 includes four support guide rods 261 distributed along a square and installed on the slow cooling frame 21. A top plate 262 is installed on the top of the support guide rod 261. A movable mounting plate 263 is sleeved on the support guide rod 261 through a guide sleeve 264. The center of the top plate 262 is equipped with an adjusting hand wheel 266, and the end of the adjusting hand wheel 266 is equipped with a screw rod 265. The bottom of the screw rod 265 is connected to the movable mounting plate 263 through a screw rod pair. In actual operation, the working height of the movable mounting plate 263 can be adjusted by adjusting the hand wheel 266, and then the distance between the upper polishing roller 268 and the lower polishing roller 2611 can be adjusted to meet the requirements of polishing different round tube surfaces. Two sets of upper polishing rollers 268 are installed at the bottom of the movable mounting plate 263. The polishing rollers 268 are respectively located above the first slow cooling friction conveying channel and the second slow cooling friction conveying channel. The two groups of upper polishing rollers 268 are connected by an upper polishing roller transmission rod 269. One end of the upper polishing roller transmission rod 269 is connected to the upper polishing roller drive motor 267. The lower polishing roller mounting seat 2610 is installed on the slow cooling frame 21. The two groups of lower polishing rollers 2611 are installed on the lower polishing roller mounting seat 2610 and are respectively located below the first slow cooling friction conveying channel and the second slow cooling friction conveying channel. During actual operation, the friction conveying mechanism 1 conveys the round tube to the first slow cooling friction conveying channel and the second slow cooling friction conveying channel, and respectively enters the polishing channel composed of the lower polishing roller 2611 and the upper polishing roller 268 in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel, and the upper polishing roller 268 is driven by the upper polishing roller drive motor 267 to rotate, and the upper polishing roller 268 and the lower polishing roller 2611 cooperate to realize the polishing of the surface of the round tube in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel, and slowly push the round tube forward in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel, so that the round tube is slowly cooled during the forward movement.

[0026] The slow cooling frame 21 is also equipped with an upper unloading device 27, which is installed below the first slow cooling friction conveying channel and the second slow cooling friction conveying channel; the upper unloading device 27 includes a cylinder mounting seat 271, which is fixed on the slow cooling frame 21, and the first unloading cylinder mounting inclined plate 272 is installed on the cylinder mounting seat 271, and the first unloading cylinder 273 is installed obliquely upward on the first unloading cylinder mounting inclined plate 272 and is located below the first slow cooling friction conveying channel, the first round tube head 274 is installed on the telescopic shaft of the first unloading cylinder 273, the second unloading cylinder 275 is installed vertically upward on the cylinder mounting seat 271 and is located below the second slow cooling friction conveying channel, the second round tube head 276 is installed on the telescopic shaft of the second unloading cylinder 275, and the top surface of the second round tube head 276 is set as an inclined surface. During actual operation, because the first unloading cylinder 273 is arranged to be tilted upward, the first unloading cylinder 273 can lift the round tube in the first slow cooling friction conveying channel and tilt it toward one side of the round tube stacking swing rack when pushing up, and then introduce it into the round tube stacking swing rack 4 for placement and storage through the unloading guide plate 28 installed on the end edge of the slow cooling rack 21; similarly, the second unloading cylinder 275 lifts the round tube in the first slow cooling friction conveying channel through the second round tube head 276 and tilts it toward one side of the round tube stacking swing rack, and then introduces it into the round tube stacking swing rack 4 for placement and storage through the unloading guide plate 28.

[0027] A discharge buffer mechanism 3 is located behind the slow cooling discharge mechanism 2 along the tube conveying direction. The discharge buffer mechanism 3 includes a buffer frame 31, on which are mounted a plurality of support rollers 32 spaced side by side along the tube conveying direction. A top discharge mechanism 27 is also mounted below the support rollers 32 on the buffer frame 31, and a guide plate 33 is mounted on the end edge of the buffer frame 31, biased toward the tube stacking and swinging rack. During operation, the front end of the tube is moved onto the support rollers 32 by the slow cooling discharge mechanism 2. The top discharge mechanism 27 in the discharge buffer mechanism 3 then cooperates with the top discharge mechanism 27 in the slow cooling discharge mechanism 2 to lift the tube. The tube is then guided by the discharge guide plate 28 and the guide plate 33 onto the tube stacking and swinging rack 4 for storage. The tube stacking and swinging rack 4 is mounted on one side of the discharge buffer mechanism 3 and is used to store the finished tubes after quenching.

[0028] The round tube quenching slow cooling unloading device is rationally designed and simple in structure. It can realize the grinding treatment of the surface of the double round tubes after tempering and realize the stable pushing cooling and unloading of the two round tubes at the same time. In actual operation, the friction conveying mechanism 1 conveys the round tubes to the first slow cooling friction conveying channel and the second slow cooling friction conveying channel of the slow cooling unloading mechanism 2, and respectively enters the grinding channel composed of the lower grinding roller 2611 and the upper grinding roller 268 in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel. The upper grinding roller driving motor 267 is used to drive the upper grinding roller 268 to rotate. Through the cooperation between the upper grinding roller 268 and the lower grinding roller 2611, the round tube surfaces in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel are polished, and the round tubes are slowly pushed forward in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel, and the round tubes are slowly cooled during the forward movement. After the round tubes enter the unloading buffer mechanism 3, the round tubes in the first slow cooling friction conveying channel and the second slow cooling friction conveying channel are pushed up and unloaded onto the round tube stacking rack 4 for storage through the top unloading device 27 installed in the slow cooling unloading mechanism 2 and the unloading buffer mechanism 3, thereby realizing the polishing treatment of the double round tube surfaces after tempering, as well as stable cooling and automatic unloading.

[0029] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings. Therefore, any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A round tube quenching and slow cooling unloading device, characterized in that include: Friction conveying mechanism; A slow cooling and unloading mechanism is arranged behind the friction conveying mechanism along the conveying direction of the round tube, and the slow cooling and unloading mechanism includes a slow cooling frame, on which are installed a plurality of slow cooling transmission rod bearing seats arranged in parallel and spaced along the conveying direction of the round tube, and four slow cooling transmission rods are installed in parallel and spaced on the slow cooling frame through the slow cooling transmission rod bearing seats, and each slow cooling transmission rod is installed with a slow cooling friction wheel, wherein the slow cooling friction wheels on the first slow cooling transmission rod and the second slow cooling transmission rod are fitted together to form the first slow cooling friction conveying channel for the round tube, and the slow cooling friction wheels on the third slow cooling transmission rod and the fourth slow cooling transmission rod are fitted together to form the second slow cooling friction conveying channel for the round tube, and a polishing slow cooling device is installed on the slow cooling frame, and the polishing slow cooling device includes four supporting guide rods installed on the slow cooling frame in a square distribution. The top of the supporting guide rod is provided with a top plate, and the movable mounting plate is connected to the supporting guide rod through a guide sleeve, and two groups of upper polishing rollers are installed at the bottom of the movable mounting plate, and the two groups of upper polishing rollers are respectively located above the first slow cooling friction conveying channel and the second slow cooling friction conveying channel. The two groups of upper polishing rollers are connected by an upper polishing roller transmission rod, and one end of the upper polishing roller transmission rod is connected to the upper polishing roller driving motor, and the lower polishing roller mounting seat is installed on the slow cooling frame, and the two groups of lower polishing rollers are installed on the lower polishing roller mounting seat and are respectively located below the first slow cooling friction conveying channel and the second slow cooling friction conveying channel. The slow cooling frame is also provided with an upper unloading device, and the upper unloading device is installed below the first slow cooling friction conveying channel and the second slow cooling friction conveying channel; A discharge buffer mechanism is arranged behind the slow cooling discharge mechanism along the conveying direction of the round tube; as well as A round tube stacking swing rack installed on one side of the unloading buffer mechanism.

2. The round tube quenching and slow cooling unloading device according to claim 1, characterized in that: The friction conveying mechanism includes a conveying frame, on which a plurality of conveying transmission rod bearing seats arranged in parallel and spaced apart are installed along the conveying direction of the round tube, and four conveying transmission rods are installed in parallel and spaced apart on the conveying frame through the conveying transmission rod bearing seats, and each conveying transmission rod is installed with a conveying friction wheel, wherein the conveying friction wheels on the first conveying transmission rod and the second conveying transmission rod are fitted together to form a first conveying friction conveying channel for the round tube, and the conveying friction wheels on the third conveying transmission rod and the fourth conveying transmission rod are fitted together to form a second conveying friction conveying channel for the round tube, and the four conveying transmission rods and the four slow cooling transmission rods on the slow cooling unloading mechanism are respectively connected through couplings, and a pressing roller assembly is correspondingly installed above the first conveying friction conveying channel and the second conveying friction conveying channel.

3. The round tube quenching and slow cooling unloading device according to claim 2, characterized in that: The pressing roller assembly includes a pressing cylinder, which is installed on the frame and arranged vertically downward facing the first friction conveying channel or the second friction conveying channel. A pressing roller mounting frame is installed on the telescopic shaft of the pressing cylinder, and four universal wheel mounting columns distributed in a square and arranged downward are installed on the pressing roller mounting frame. A universal roller is installed at the bottom of each universal wheel mounting column, and a round tube shield is installed between two universal rollers distributed longitudinally.

4. The round tube quenching and slow cooling unloading device according to claim 1, characterized in that: The unloading cache mechanism includes a cache rack, on which a plurality of support rollers are installed along the conveying direction of the round tubes, and a top unloading device is installed below the support rollers on the cache rack, and a guide plate is installed on the end edge of the cache rack, which is biased towards the round tube stacking rack.

5. The round tube quenching and slow cooling unloading device according to claim 4, characterized in that: The upper unloading device includes a cylinder mounting seat, which is fixed on a slow cooling rack or a cache rack, a first unloading cylinder mounting inclined plate is mounted on the cylinder mounting seat, the first unloading cylinder is mounted obliquely upward on the first unloading cylinder mounting inclined plate and is located below the first slow cooling friction conveying channel, the first round tube head is mounted on the telescopic shaft of the first unloading cylinder, the second unloading cylinder is mounted vertically upward on the cylinder mounting seat and is located below the second slow cooling friction conveying channel, the second round tube head is mounted on the telescopic shaft of the second unloading cylinder, and the top surface of the second round tube head is set as an inclined surface.

6. The round tube quenching and slow cooling unloading device according to claim 1, characterized in that: An adjusting hand wheel is installed at the center of the top plate in the polishing and slow cooling device, a screw rod is installed at the end of the adjusting hand wheel, and the bottom of the screw rod is connected to the movable mounting plate through a screw rod pair.

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