A tubular cooler

Abstract

The present invention relates to the technical field of solidified yogurt coolers, and specifically relates to a tubular cooler, which includes a mounting frame and cooling pipes. The cooling pipes are connected by double-headed elbow pipes to form a rotary flow channel. Cooling cavity connecting pipes are respectively arranged at both ends of the cooling pipes. The upper and lower cooling pipes are connected by a communicating pipe to form a rotary cooling water flow channel. A rotor pump is used to push the solidified yogurt that has completed the primary fermentation to flow in the pipeline for cooling, and then enter another fermentation tank, and the temperature of the liquid material is controlled within the range of 25-30 °C for secondary fermentation. The technical solution is to use a rotor pump to pass the solidified yogurt that has matured in the primary fermentation through the tubular cooler and enter another fermentation tank for secondary fermentation.

Description

Technical Field

[0001] The present invention relates to the technical field of solidified yogurt coolers, and specifically relates to a tubular cooler. Background Art

[0002] Sour milk powder is a powdered product made by processes such as spray drying of fermented yogurt. It retains the main nutrients and active beneficial bacteria in yogurt, and has the characteristics of convenient storage and transportation and extended shelf life. Traditional yogurt processing involves acceptance of raw and auxiliary materials, milk purification, preheating, batching, standardization, homogenization, sterilization, cooling, inoculation of strains, fermentation and ripening, and then storage in a warehouse (warehouse temperature 2 - 6°C) for sale. However, the yogurt required for the production of sour milk powder needs to be quickly cooled to 25 - 30°C immediately after the initial fermentation and ripening, and then enter the secondary fermentation. Therefore, it is necessary to quickly cool the yogurt after the initial fermentation.

[0003] For this reason, a rotor pump is needed to push the solidified yogurt after the initial fermentation and ripening through a tubular cooler, so that the yogurt quickly flows and cools to another fermentation tank, and the temperature of the liquid material is controlled within the range of 25 - 30°C for secondary re-fermentation. Then, after demulsification, spraying, and low-temperature drying, sour milk powder is made. Using a tubular cooler can solve the problem of difficult cooling of solidified yogurt in the fermentation tank, and at the same time ensure uniform yogurt temperature, fast cooling, and improve the taste quality of yogurt after secondary fermentation. However, when the tubular cooler cools down, the coolant is coated outside the material pipe for heat exchange, but the temperature of the side of the coolant close to the material pipe is relatively high, and there are parts with uneven temperature during the flow of the coolant, resulting in uneven cooling effect on the material. Moreover, during the process of the coolant cooling the surface of the material pipe, impurities are easily generated on the surface of the material pipe, and the attachment of impurities on the surface of the material pipe will affect the efficiency of heat conduction and the cooling uniformity, and uneven cooling will affect the subsequent taste of the material. Summary of the Invention

[0004] In view of the above problems, it is necessary to provide a tubular cooler for the problems of the prior art.

[0005] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0006] A tubular cooler, comprising a mounting frame and a plurality of cooling tubes mounted on the mounting frame. The cooling tubes are connected by double-headed elbows to form a rotary flow channel. The cooling tubes located at the top of the mounting frame are respectively connected to a feed pipe and a discharge pipe. An inner tube is coaxially arranged inside the cooling tube, and both ends of the inner tube are communicated with the double-headed elbows, the feed pipe and the discharge pipe. The space of the cooling tube outside the inner tube forms a cooling cavity. Cooling cavity connecting pipes are respectively arranged vertically at both ends of the cooling tube. The cooling cavity connecting pipe at one end of the cooling tube located at the top of the mounting frame is connected to a cooling water delivery pipe. The cooling cavity connecting pipes of the upper and lower cooling tubes are communicated through a connecting pipe to form a rotary cooling water flow channel. A cooling water output pipe is arranged at the cooling cavity connecting pipe of the cooling tube at the bottom of the mounting frame; a spiral blade is arranged inside the cooling tube, and sleeves arranged at both ends of the spiral blade are sleeved outside the inner tube, and the spiral blade fits the inner wall of the cooling tube and the outer wall of the inner tube; a rotating shaft is coaxially installed inside the connecting pipe, a stirring blade is arranged on the rotating shaft, a mounting seat is arranged outside the connecting pipe, and a rotation driving unit for driving the rotating shaft and the spiral blade to rotate around their own axes is arranged on the mounting seat.

[0007] Preferably, the axis of the cooling water output pipe is horizontally arranged, and a flange joint for connecting the connecting pipe arranged on the bottommost cooling tube of the mounting frame is arranged on the upper side of the cooling water output pipe; a rotating shaft is coaxially arranged inside the cooling water output pipe, a plurality of partitions extending radially along the rotating shaft are arranged on the circumferential side of the rotating shaft, and the top ends of the partitions fit the inner wall of the cooling water output pipe; liquid outlet channels and slag outlet channels extending along the tangential direction of the cooling water output pipe are arranged on both sides of the bottom of the cooling water output pipe. An arc-shaped filter screen with the same radian as the inner wall of the cooling water output pipe is arranged at the liquid outlet channel, a liquid collecting box is arranged at the end of the liquid outlet channel far away from the cooling water output pipe, and a slag collecting box is arranged at the end of the slag outlet channel far away from the cooling water output pipe; a rotary driver is fixedly installed outside the cooling water output pipe, and the working end of the rotary driver is in transmission connection with the rotating shaft, and the rotary driver drives the rotating shaft to rotate around its own axis.

[0008] Preferably, a collar is coaxially arranged outside the rotating shaft, and the collar is connected to the rotating shaft through a plurality of connecting pieces. The inner diameter of the collar is larger than the inner diameter of the connecting pipe. The collar is located in a mounting pipe arranged in the middle of the connecting pipe, and limiting rings fitting the outer wall of the collar are arranged at the upper and lower ends of the mounting pipe; a tooth groove is arranged on the outer wall of the collar, and the tooth groove is located between the upper and lower limiting rings. The rotation driving unit includes a driving gear rotatably installed on the mounting seat, the axis of the driving gear is parallel to the tooth groove, the driving gear passes through a communication port arranged on one side of the mounting pipe and meshes with the tooth groove of the collar. The rotation driving unit further includes a first rotary driver for driving the driving gear to rotate, and the first rotary driver is fixedly installed on the mounting seat.

[0009] Preferably, conical tooth grooves surrounding the sleeves are provided on the sleeves at both ends of the spiral blades. Shaft tubes that are collinear with the driving gears are provided at both ends of the cooling tubes. Bevel gears are rotatably installed at the shaft tubes. The shaft rods at the axes of the bevel gears pass through the shaft tubes and extend to the outside of the cooling tubes. The bevel gears are meshed and connected with the conical tooth grooves. When one end of the shaft rod located outside the cooling tube is in transmission connection with the rotary drive unit, the bevel gears rotate to drive the spiral blades to rotate.

[0010] Preferably, a connection disk is coaxially arranged at one end of the shaft rod located outside the cooling tube. The upper side of the connection disk fits against the bottom end of the shaft tube. An insertion hole is coaxially arranged on the lower side of the connection disk. Vertical baffles are arranged on the inner wall of the insertion hole. A spline groove is arranged at the axis of the driving gear. A spline shaft is slidably installed in the spline groove. A linear drive for driving the spline shaft to move in the vertical direction is fixedly installed on the mounting seat. A top head is coaxially arranged at the top end of the spline shaft. At least one elastic top block is elastically installed on the periphery of the top head. When the top head is inserted into the insertion hole of the connection disk, the elastic top block contacts the baffle to drive the bevel gear to rotate synchronously with the rotating shaft.

[0011] Preferably, the diameter of the top head is smaller than the linear distance between the axis of the insertion hole and the surface of the baffle. The thickness by which the elastic top block protrudes from the side surface of the top head is not less than the difference between the radius of the insertion hole and the radius of the top head. The upper and lower ends of the elastic top block are provided with bevels.

[0012] Preferably, the working end of the linear drive moves in the vertical direction. The linear drive is fixedly installed below the mounting seat. A through hole collinear with the driving gear is arranged on the mounting seat. The working end of the linear drive passes through the through hole and contacts the bottom end of the spline shaft.

[0013] Preferably, a ball is rotatably installed at the position where the bottom end of the spline shaft contacts the working end of the linear drive. The surface of the ball protrudes from the bottom surface of the spline shaft.

[0014] Preferably, a draw box is slidably installed in the slag collection box.

[0015] Preferably, a plugging head is installed at the cooling cavity connecting pipe of the cooling tube that is not connected to the connecting pipe. The plugging head is used to plug the cooling cavity connecting pipe.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] First, the spiral blades in the cooling pipe of the present invention are attached to the outer wall of the inner pipe and the inner wall of the cooling pipe. When the coolant flows in the spiral channels formed by the spiral blades, it can not only make the coolant contact the inner pipe for a longer time, but also mix the coolant during movement to ensure uniform coolant temperature. When the coolant enters the connecting pipe through the cooling cavity connecting pipe and flows into the lower cooling pipe, the rotation driving unit in the connecting pipe can drive the rotating shaft to drive the stirring blades to rotate, stir the coolant passing through the connecting pipe, make its temperature more uniform after mixing, ensure the uniformity of the heat absorption effect on the subsequent inner pipe, and enable the materials in the inner pipe to be cooled evenly.

[0018] Second, the spiral blades of the present invention are sleeved outside the inner pipe through sleeves at both ends. The rotation driving unit can drive the spiral blades to rotate around the axis of the inner pipe. During the rotation process, the spiral blades can scrape off the impurities formed between the outer wall of the inner pipe and the inner wall of the cooling pipe. The scraped impurities flow along with the coolant, thus avoiding the influence of impurities attached to the outside of the inner pipe on the cooling efficiency of the coolant for the materials.

[0019] Third, when the coolant carrying impurities flows into the lowest cooling water output pipe, it is located between two adjacent partitions on the rotating shaft. When the coolant between the partitions moves to the liquid outlet channel along with the rotating shaft, the coolant passes through the arc-shaped filter screen. The impurities are filtered by the arc-shaped filter screen and are pushed by the subsequent partitions to the slag outlet channel during the movement of the partitions. The impurities accumulate at the slag outlet channel, and the separation of impurities and coolant is automatically realized during the rotation of the rotating shaft, so that the coolant discharged through the liquid collecting tank does not contain impurities and can be directly recycled, saving resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective view of a tubular cooler;

[0021] Figure 2 is a side view of a tubular cooler;

[0022] Figure 3 is a sectional view taken along A-A of a tubular cooler in the first working state Figure 2 ;

[0023] Figure 4 is Figure 3 a partial enlarged view of B;

[0024] Figure 5 is Figure 3 a partial enlarged view of C;

[0025] Figure 6 is a perspective sectional view taken along A-A of a tubular cooler in the first working state Figure 2 ;

[0026] Figure 7 isFigure 6 Partial enlarged view at D

[0027] Figure 8 A tubular cooler in the second working state along the Figure 2 Cross-sectional view taken along A-A

[0028] Figure 9 is Figure 8 Partial enlarged view at E

[0029] Figure 10 Stereogram of the connecting pipe of a tubular cooler

[0030] Figure 11 Stereogram of the rotating shaft of a tubular cooler

[0031] In the figure, the reference numerals are: 1, mounting bracket; 2, cooling pipe; 21, double-headed elbow; 22, feed pipe; 23, discharge pipe; 24, inner pipe; 25, cooling cavity connecting pipe; 251, plugging head; 26, cooling water delivery pipe; 27, spiral blade; 271, sleeve; 272, conical tooth groove; 273, bevel gear; 274, shaft rod; 275, connecting disk; 276, insertion hole; 277, retaining bar; 28, shaft tube; 3, connecting pipe; 31, rotating shaft; 311, stirring blade; 312, collar; 313, connecting piece; 314, tooth groove; 32, mounting seat; 321, through hole; 33, rotation driving unit; 331, driving gear; 332, first rotation driver; 333, spline groove; 334, spline shaft; 335, linear driver; 336, top head; 337, elastic top block; 338, ball; 34, mounting pipe; 341, limiting ring; 342, communication port; 4, cooling water output pipe; 41, flange joint; 42, rotating shaft; 421, partition; 43, liquid outlet channel; 431, arc-shaped filter screen; 432, liquid collecting box; 44, slag outlet channel; 441, slag collecting box; 442, extraction box; 45, rotation driver. Detailed implementation mode

[0032] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific implementation modes.

[0033] Refer to Figures 1 to 11 :

[0034] A tubular cooler, comprising a mounting frame 1 and a plurality of cooling tubes 2 mounted on the mounting frame 1. The cooling tubes 2 are connected by double-headed elbows 21 to form a rotary flow channel. The cooling tubes 2 located at the top of the mounting frame 1 are respectively connected to a feed pipe 22 and a discharge pipe 23. An inner tube 24 is coaxially arranged inside the cooling tube 2. The space between the cooling tube 2 and the inner tube 24 forms a cooling cavity. Cooling cavity connecting pipes 25 are respectively arranged at both ends of the cooling tube 2. The cooling cavity connecting pipe 25 at one end of the cooling tube 2 located at the top of the mounting frame 1 is connected to a cooling water delivery pipe 26. The cooling cavity connecting pipes 25 of the upper and lower two cooling tubes 2 are connected by a communicating pipe 3 to form a rotary cooling water flow channel. A cooling water output pipe 4 is arranged at the cooling cavity connecting pipe 25 of the cooling tube 2 located at the bottom of the mounting frame 1. A spiral blade 27 is arranged inside the cooling tube 2. Sleeves 271 arranged at both ends of the spiral blade 27 are sleeved outside the inner tube 24. The spiral blade 27 fits the inner wall of the cooling tube 2 and the outer wall of the inner tube 24. A rotating shaft 31 is coaxially installed inside the communicating pipe 3. Stirring blades 311 are arranged on the rotating shaft 31. A mounting seat 32 is arranged outside the communicating pipe 3. A rotating drive unit 33 for driving the rotating shaft 31 and the spiral blade 27 to rotate around their own axes is arranged on the mounting seat 32.

[0035] When the tubular cooler in this application is in use, the material enters the cooling pipe 2 at the top of the mounting frame 1 through the feed pipe 22, then flows into other cooling pipes 2 through the double-headed elbow pipe 21, and is discharged through the discharge pipe 23 after multiple rotations. The staff can set the movement path of the material through the cooling pipe 2 and the double-headed elbow pipe 21, and increase the movement time of the material in the cooling pipe 2 through the rotary flow path. In this embodiment, an inner pipe 24 is provided in the cooling pipe 2. The two ends of the inner pipes 24 at different positions can be attached to the feed pipe 22, the discharge pipe 23 or the double-headed elbow pipe 21. Therefore, the material entering the cooling pipe 2 flows in the inner pipe 24. The cooling pipe 2 is located outside the inner pipe 24 to form a cooling cavity. The coolant enters the cooling cavity in the cooling pipe 2 through the cooling water delivery pipe 26 and the cooling cavity connecting pipe 25 on the cooling pipe 2. The coolant absorbs the heat transferred to the inner pipe 24 by the material and cools the material in the inner pipe 24. The coolant in the upper cooling pipe 2 flows into the lower cooling pipe 2 through the cooling cavity connecting pipe 25 and the connecting pipe 3. The staff can set the connecting pipe 3 at the cooling cavity connecting pipe 25 of the cooling pipe 2 away from the coolant input end to realize the rotary flow of the coolant. The coolant is in full contact with the inner pipe 24 during the flow process. In order to avoid the problem of uneven temperature of the coolant after heat absorption, a spiral blade 27 is provided in the cooling pipe 2 in this embodiment. The spiral blade 27 fits the outer wall of the inner pipe 24 and the inner wall of the cooling pipe 2. When the coolant flows in the spiral channel formed by the spiral blade 27, it can not only make the coolant contact the inner pipe 24 for a longer time, but also mix the coolant during movement to ensure uniform coolant temperature. When the coolant enters the connecting pipe 3 through the cooling cavity connecting pipe 25 and flows into the lower cooling pipe 2, the rotation drive unit 33 in the connecting pipe 3 can drive the rotating shaft 31 to drive the stirring blade 311 to rotate, stir the coolant passing through the connecting pipe 3, and make its temperature more uniform after mixing, ensuring the uniformity of the heat absorption effect on the inner pipe 24 in the subsequent cooling pipe 2, so that the material in the inner pipe 24 can be cooled evenly; in this embodiment, the spiral blade 27 is sleeved outside the inner pipe 24 through the sleeves 271 at both ends, and the rotation drive unit 33 can drive the spiral blade 27 to rotate around the axis of the inner pipe 24. The spiral blade 27 can scrape off the impurities formed between the outer wall of the inner pipe 24 and the inner wall of the cooling pipe 2 during the rotation process. The scraped impurities flow along with the coolant, thus preventing impurities from adhering to the outside of the inner pipe 24 and affecting the cooling efficiency of the coolant on the material.

[0036] In order to solve the problem of how to separate the impurities scraped by the spiral blade 27 from the coolant, the following features are specifically set:

[0037] The axis of the cooling water output pipe 4 is horizontally arranged. On the upper side of the cooling water output pipe 4, there is a flange joint 41 for connecting the communicating pipe 3 arranged on the bottommost cooling pipe 2 of the mounting frame 1. Coaxially arranged inside the cooling water output pipe 4 is a rotating shaft 42. On the circumferential side of the rotating shaft 42, there are several partition plates 421 extending radially along the rotating shaft 42, and the top ends of the partition plates 421 are in contact with the inner wall of the cooling water output pipe 4. On both sides of the bottom of the cooling water output pipe 4, there are a liquid outlet channel 43 and a slag outlet channel 44 extending along the tangential direction of the cooling water output pipe 4. At the liquid outlet channel 43, there is an arc-shaped filter screen 431 with the same radian as the inner wall of the cooling water output pipe 4. At the end of the liquid outlet channel 43 away from the cooling water output pipe 4, there is a liquid collection tank 432, and at the end of the slag outlet channel 44 away from the cooling water output pipe 4, there is a slag collection tank 441. Outside the cooling water output pipe 4, a rotary drive 45 is fixedly installed, and the working end of the rotary drive 45 is in transmission connection with the rotating shaft 42, and the rotary drive 45 drives the rotating shaft 42 to rotate around its own axis.

[0038] In this embodiment, the coolant carrying impurities flows into the lowest cooling water output pipe 4. The cooling water output pipe 4 is connected to the bottommost communicating pipe 3 through the flange joint 41. When the coolant enters the cooling water output pipe 4, it is located between two adjacent partition plates 421 on the rotating shaft 42. Following the rotation of the rotating shaft 42, the coolant between the partition plates 421 moves to the liquid outlet channel 43. The top ends of the partition plates 421 are in contact with the surface of the arc-shaped filter screen 431 at the liquid outlet channel 43. The coolant passes through the arc-shaped filter screen 431, and the impurities are filtered by the arc-shaped filter screen 431 and are pushed by the subsequent partition plates 421 towards the slag outlet channel 44 during the movement of the partition plates 421. The impurities accumulate at the slag outlet channel 44 and finally enter the slag collection tank 441 for unified collection. In this embodiment, the rotating shaft 42 is connected to the working end of the rotary drive 45 outside the cooling water output pipe 4. The rotary drive 45 can be a servo motor. During the process of the rotary drive 45 driving the rotating shaft 42 to rotate, the separation of impurities and coolant is realized, so that the coolant discharged through the liquid collection tank 432 does not contain impurities and can be directly recycled to save resources.

[0039] To solve the problem of how the rotary drive unit 33 drives the rotating shaft 31 in the communicating pipe 3 to rotate without affecting the flow of the coolant, the following features are specifically set:

[0040] A collar 312 is coaxially arranged outside the rotating shaft 31 (as Figure 11As shown in the figure, the collar 312 is connected to the rotating shaft 31 by a plurality of connecting pieces 313. The inner diameter of the collar 312 is larger than the inner diameter of the connecting pipe 3. The collar 312 is located in the mounting tube 34 arranged in the middle of the connecting pipe 3. The upper and lower ends of the mounting tube 34 are provided with limit rings 341 that fit the outer wall of the collar 312. The outer wall of the collar 312 is provided with a tooth groove 314, and the tooth groove 314 is located between the upper and lower limit rings 341. The rotation driving unit 33 includes a driving gear 331 rotatably mounted on the mounting seat 32. The axis of the driving gear 331 is arranged parallel to the tooth groove 314. The driving gear 331 passes through a connecting port 342 arranged on one side of the mounting tube 34 and is meshed with the tooth groove 314 of the collar 312. The rotation driving unit 33 also includes a first rotation driver 332 that drives the driving gear 331 to rotate. The first rotation driver 332 is fixedly mounted on the mounting seat 32.

[0041] The rotating shaft 31 in this embodiment is connected to the collar 312 through a connecting piece 313. The collar 312 is installed at the mounting tube 34 of the connecting tube 3. The limiting ring 341 of the mounting tube 34 ensures that the axial position of the collar 312 is stable. The coolant flowing through the connecting tube 3 flows downward through the channel between the connecting pieces 313. The fit between the limiting ring 341 and the outer wall of the collar 312 also ensures that the coolant will not leak. The driving gear 331 of the rotation driving unit 33 is meshed and connected with the tooth groove 314 on the outer wall of the collar 312 through the connecting port 342 of the mounting tube 34. Therefore, the rotation of the driving gear 331 located outside the connecting tube 3 can drive the rotating shaft 31 inside the connecting tube 3 to rotate, thereby stirring the coolant passing through the connecting tube 3. The first rotating driver 332 installed on the mounting seat 32 can be connected to the driving gear 331 through a transmission belt. The first rotating driver 332 can be a servo motor, etc.

[0042] In order to solve the problem of how the rotation drive unit 33 drives the spiral blades 27 in the cooling tube 2 to rotate when it is necessary to clean the impurities on the outer wall of the inner tube 24 and the inner wall of the cooling tube 2, the following features are specifically set:

[0043] The sleeves 271 at both ends of the spiral blade 27 are provided with bevel tooth grooves 272 surrounding the sleeves 271 (combined with Figure 4 , Figure 7 and Figure 9 ), shaft tubes 28 which are in the same straight line as the driving gear 331 are provided at both ends of the cooling tube 2, a bevel gear 273 is rotatably installed at the shaft tube 28, a shaft rod 274 at the axis of the bevel gear 273 passes through the shaft tube 28 and extends to the outside of the cooling tube 2, the bevel gear 273 is meshed and connected with the bevel tooth groove 272, and when one end of the shaft rod 274 located outside the cooling tube 2 is transmission-connected to the rotating drive unit 33, the bevel gear 273 rotates to drive the spiral blade 27 to rotate.

[0044] One end of the shaft rod 274 located outside the cooling pipe 2 is coaxially provided with a connection disk 275. The upper side of the connection disk 275 is attached to the bottom end of the shaft tube 28 (as Figure 7 shown). The lower side of the connection disk 275 is coaxially provided with an insertion hole 276, and the inner wall of the insertion hole 276 is provided with a vertically extending retaining strip 277; a spline groove 333 is provided at the axis of the driving gear 331 (as Figure 10 shown). A spline shaft 334 is slidably installed in the spline groove 333. A linear driver 335 for driving the spline shaft 334 to move in the vertical direction is fixedly installed on the mounting seat 32; a top head 336 is coaxially provided at the top end of the spline shaft 334, and at least one elastic top block 337 is elastically installed on the periphery of the top head 336. When the top head 336 is inserted into the insertion hole 276 of the connection disk 275, the elastic top block 337 contacts the retaining strip 277 to drive the bevel gear 273 to rotate synchronously with the rotating shaft 31.

[0045] In this embodiment, the cooling pipe 2 is provided with a shaft tube 28 on the same straight line above the driving gear 331. The bevel gear 273 is inserted into the shaft tube 28 through the shaft rod 274. The bevel gear 273 located inside the cooling pipe 2 meshes with the bevel gear groove 272 provided on the sleeve 271. Since the connection disk 275 at the bottom end of the shaft rod 274 is attached to the bottom end of the shaft tube 28, the position of the bevel gear 273 inside the cooling pipe 2 is ensured to be stable, and the meshing connection state of the bevel gear groove 272 and the bevel gear 273 is stable. A spline groove 333 is provided at the axis of the driving gear 331 of the rotation driving unit 33, and the spline shaft 334 is installed at the spline groove 333. When the first rotation driver 332 drives the driving gear 331 to rotate, the spline shaft 334 rotates synchronously. The working end of the linear driver 335 can be located below to push the spline shaft 334 to move upward during rotation until the top head 336 at the top end of the spline shaft 334 is inserted into the insertion hole 276 at the bottom of the connection disk 275. The elastic top block 337 on the periphery of the top head 336 contacts the retaining strip 277 when rotating in the insertion hole 276, so as to push the retaining strip 277 to move through the elastic top block 337 to realize the synchronous rotation of the bevel gear 273 and the driving gear 331, so that the spiral blade 27 rotates inside the cooling pipe 2 to scrape the impurities on the outer wall of the inner pipe 24 and the inner wall of the cooling pipe 2. The linear driver 335 in this embodiment can be an electric push rod, etc. The movement of the spline shaft 334 in the vertical direction can make the top head 336 be in transmission connection with or separated from the connection disk 275, so that the spiral blade 27 can be rotated regularly to clean the impurities in the cooling pipe 2, reducing the pressure on the working shaft of the first rotation driver 332.

[0046] In order to ensure that the top head 336 enters the insertion hole 276 from top to bottom, the following features are specifically set:

[0047] The diameter of the top head 336 is smaller than the linear distance between the axis of the insertion hole 276 and the surface of the retaining bar 277. The thickness by which the elastic top block 337 protrudes from the side surface of the top head 336 is not less than the difference between the radius of the insertion hole 276 and the radius of the top head 336; chamfers are provided at the upper and lower ends of the elastic top block 337.

[0048] In this embodiment, the diameter of the top head 336 is smaller than the linear distance between the axis of the insertion hole 276 and the surface of the retaining bar 277, ensuring that the top head 336 can enter the insertion hole 276. In this embodiment, the elastic top block 337 is slidably installed in a transverse hole provided on the circumferential side of the top head 336. A spring that elastically connects to the elastic top block 337 is provided in the transverse hole. The spring pushes the elastic top block 337 to protrude from the circumferential side of the top head 336. During the upward movement of the elastic top block 337, when the inclined surface at the top end of the elastic top block 337 contacts the lower edge of the insertion hole 276 or the lower edge of the retaining bar 277, the elastic top block 337 can be compressed into the transverse hole of the top head 336. After the top head 336 completely enters the insertion hole 276, the elastic top block 337 pops out under the action of the elastic force. Since the thickness by which the elastic top block 337 protrudes from the side surface of the top head 336 is not less than the difference between the radius of the insertion hole 276 and the radius of the top head 336, it can be ensured that the elastic top block 337 can fit against the side surface of the retaining bar 277 during movement, driving the connection disk 275, the shaft rod 274, and the bevel gear 273 to rotate.

[0049] To solve the problem of how to reduce the friction generated between the linear actuator 335 and the working end of the spline shaft 334 when the linear actuator 335 pushes the spline shaft 334 upward during rotation, the following features are specifically provided:

[0050] The working end of the linear actuator 335 is arranged to move in the vertical direction. The linear actuator 335 is fixedly installed below the mounting seat 32. A through hole 321 that is in the same straight line as the driving gear 331 is provided on the mounting seat 32. The working end of the linear actuator 335 passes through the through hole 321 and contacts the bottom end of the spline shaft 334.

[0051] A ball 338 is rotatably installed at the position where the bottom end of the spline shaft 334 contacts the working end of the linear actuator 335. The surface of the ball 338 protrudes from the bottom surface of the spline shaft 334.

[0052] In this embodiment, the linear actuator 335 is located below the spline shaft 334. The working end of the linear actuator 335 passes through the through hole 321 and contacts the ball 338 rotatably installed at the bottom of the spline shaft 334. When the ball 338 contacts the working end of the linear actuator 335, rolling friction is generated, reducing frictional heat generation while ensuring the smooth rotation of the spline shaft 334.

[0053] To clean the impurities discharged from the slag discharge channel 44, the following features are specifically provided:

[0054] A draw box 442 is slidably installed inside the slag collection box 441.

[0055] In this embodiment, the draw box 442 has an upward opening to collect impurities discharged from the slag discharge channel 44 into the slag collection box 441, and the staff can regularly draw out the draw box 442 for cleaning.

[0056] In order to design the coolant flow path in the cooling pipe 2, the following features are specifically set:

[0057] A plugging head 251 is installed at the cooling cavity connecting pipe 25 of the cooling pipe 2 that is not connected to the connecting pipe 3, and the plugging head 251 is used to plug the cooling cavity connecting pipe 25.

[0058] In this embodiment, the cooling cavity connecting pipe 25 of the cooling pipe 2 at the coolant input end is plugged by the plugging head 251. By setting the installation positions of the plugging head 251 and the connecting pipe 3, the staff can set the coolant flow path in the cooling pipe 2 to ensure full contact between the coolant and the inner pipe 24.

[0059] Working principle: Materials enter the cooling pipe 2 at the top of the mounting frame 1 through the feed pipe 22. The materials entering the cooling pipe 2 flow inside the inner pipe 24. The cooling pipe 2 forms a cooling cavity outside the inner pipe 24. The coolant enters the cooling cavity in the cooling pipe 2 through the cooling water delivery pipe 26 and the cooling cavity connecting pipe 25 on the cooling pipe 2. The coolant absorbs the heat transferred from the materials to the inner pipe 24 and cools the materials in the inner pipe 24. The coolant in the upper cooling pipe 2 flows through the cooling cavity connecting pipe 25 and the connecting pipe 3 to the lower cooling pipe 2. A spiral blade 27 is arranged inside the cooling pipe 2. The spiral blade 27 fits the outer wall of the inner pipe 24 and the inner wall of the cooling pipe 2. When the coolant flows in the spiral channel formed by the spiral blade 27, the coolant is mixed during movement to ensure uniform coolant temperature. When the coolant enters the connecting pipe 3 through the cooling cavity connecting pipe 25 and flows into the lower cooling pipe 2, the rotation driving unit 33 in the connecting pipe 3 can drive the rotating shaft 31 to drive the stirring blade 311 to rotate, stirring the coolant passing through the connecting pipe 3. The spiral blade 27 can rotate. During rotation, the spiral blade 27 can scrape off the impurities formed between the outer wall of the inner pipe 24 and the inner wall of the cooling pipe 2. The coolant carries the impurities and flows to the lowest cooling water output pipe 4. When the coolant enters the cooling water output pipe 4, it is located between two adjacent partitions 421 on the rotating shaft 42. Following the rotation of the rotating shaft 42, the coolant between the partitions 421 moves to the liquid outlet channel 43. The top end of the rotating shaft 42 fits the surface of the arc-shaped filter screen 431 at the liquid outlet channel 43. The coolant passes through the arc-shaped filter screen 431, and the impurities are filtered by the arc-shaped filter screen 431 and are pushed by the subsequent partitions 421 towards the slag discharge channel 44 during the movement of the partitions 421. The impurities accumulate at the slag discharge channel 44 and finally enter the slag collection box 441 for unified collection.

[0060] The above embodiments merely represent one or several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A tubular cooler, comprising a mounting frame (1), and a plurality of cooling pipes (2) mounted on the mounting frame (1), wherein the cooling pipes (2) are connected to each other via double-ended elbows (21) to form a rotary flow channel, and the cooling pipes (2) located at the top of the mounting frame (1) are respectively connected to a feed pipe (22) and a discharge pipe (23), characterized in that: An inner tube (24) is coaxially arranged inside the cooling tube (2), and a cooling cavity is formed in the space outside the inner tube (24) of the cooling tube (2). Vertical cooling cavity connecting tubes (25) are respectively arranged at both ends of the cooling tube (2). The cooling cavity connecting tube (25) at one end of the cooling tube (2) located at the top of the mounting frame (1) is connected to a cooling water delivery pipe (26). The cooling cavity connecting tubes (25) of the upper and lower cooling tubes (2) are connected via a connecting tube (3) to form a rotary cooling water flow channel. A cooling water output pipe (4) is arranged at the cooling cavity connecting tube (25) of the cooling tube (2) located at the bottom of the mounting frame (1); A spiral blade (27) is arranged inside the cooling pipe (2), and sleeves (271) arranged at both ends of the spiral blade (27) are sleeved outside the inner pipe (24), so that the spiral blade (27) fits the inner wall of the cooling pipe (2) and the outer wall of the inner pipe (24); A rotating shaft (31) is coaxially mounted inside the connecting tube (3), a stirring blade (311) is arranged on the rotating shaft (31), a mounting seat (32) is arranged outside the connecting tube (3), and a rotating driving unit (33) is arranged on the mounting seat (32) for driving the rotating shaft (31) and the spiral blade (27) to rotate around its own axis; A collar (312) is coaxially arranged outside the rotating shaft (31), the inner wall of the collar (312) is connected to the rotating shaft (31) via a plurality of connecting pieces (313), the inner diameter of the collar (312) is larger than the inner diameter of the connecting pipe (3), the collar (312) is located in a mounting pipe (34) arranged in the middle of the connecting pipe (3), and limit rings (341) are arranged at the upper and lower ends of the mounting pipe (34) to fit the outer wall of the collar (312); The outer wall of the collar (312) is provided with a tooth groove (314), the tooth groove (314) is located between the upper and lower limiting rings (341), the rotation drive unit (33) comprises a driving gear (331) rotatably mounted on the mounting seat (32), the axis of the driving gear (331) is arranged parallel to the tooth groove (314), the driving gear (331) passes through a communication port (342) arranged on one side of the mounting tube (34) and is meshedly connected with the tooth groove (314) of the collar (312), and the rotation drive unit (33) further comprises a first rotation drive (332) driving the driving gear (331) to rotate, the first rotation drive (332) being fixedly mounted on the mounting seat (32); The sleeves (271) at both ends of the spiral blade (27) are provided with bevel tooth grooves (272) surrounding the sleeves (271); shaft tubes (28) located on the same straight line as the drive gear (331) are provided at both ends of the cooling tube (2); a bevel gear (273) is rotatably mounted on the shaft tube (28); a shaft rod (274) at the axis of the bevel gear (273) passes through the shaft tube (28) and extends to the outside of the cooling tube (2); the bevel gear (273) is meshedly connected with the bevel tooth grooves (272); when one end of the shaft rod (274) located outside the cooling tube (2) is transmission-connected to the rotary drive unit (33), the rotation of the bevel gear (273) drives the spiral blade (27) to rotate; A connecting plate (275) is coaxially arranged at one end of the shaft rod (274) located outside the cooling tube (2), the upper side of the connecting plate (275) is in contact with the bottom end of the shaft tube (28), an inserting hole (276) is coaxially arranged at the lower side of the connecting plate (275), and a vertically extending blocking strip (277) is arranged on the inner wall of the inserting hole (276); A spline groove (333) is provided at the axis of the driving gear (331), a spline shaft (334) is slidably mounted in the spline groove (333), and a linear driver (335) for driving the spline shaft (334) to move in a vertical direction is fixedly mounted on the mounting seat (32); A top end of the spline shaft (334) is coaxially provided with a plug (336), and at least one elastic top block (337) is elastically mounted on the circumference of the plug (336). When the plug (336) is inserted into the insertion hole (276) of the connecting plate (275), the elastic top block (337) contacts the stop bar (277) to drive the bevel gear (273) and the rotating shaft (31) to rotate synchronously.

2. A tubular cooler according to claim 1, characterized in that: The cooling water output pipe (4) is arranged with its axis horizontally, and a flange joint (41) is arranged on the upper side of the cooling water output pipe (4) for connecting to a connecting pipe (3) arranged on the bottom cooling pipe (2) of the mounting frame (1); A rotating shaft (42) is coaxially arranged inside the cooling water output pipe (4), and a plurality of partitions (421) extending radially along the rotating shaft (42) are arranged on the circumference of the rotating shaft (42), and the top ends of the partitions (421) are in contact with the inner wall of the cooling water output pipe (4); A liquid outlet channel (43) and a slag outlet channel (44) extending in the tangential direction of the cooling water outlet pipe (4) are arranged on both sides of the bottom of the cooling water outlet pipe (4); an arc-shaped filter screen (431) having the same arc as the inner wall of the cooling water outlet pipe (4) is arranged at the liquid outlet channel (43); a liquid collecting box (432) is arranged at one end of the liquid outlet channel (43) away from the cooling water outlet pipe (4); and a slag collecting box (441) is arranged at one end of the slag outlet channel (44) away from the cooling water outlet pipe (4); A rotary driver (45) is fixedly mounted on the outside of the cooling water output pipe (4). The working end of the rotary driver (45) is in driving connection with the rotating shaft (42). The rotary driver (45) drives the rotating shaft (42) to rotate around its own axis.

3. A tubular cooler according to claim 2, characterized in that: The diameter of the plug (336) is smaller than the linear distance between the axis of the insertion hole (276) and the surface of the stop bar (277), and the thickness of the elastic top block (337) protruding from the side of the plug (336) is not less than the difference between the radius of the insertion hole (276) and the radius of the plug (336); The upper and lower ends of the elastic top block (337) are provided with bevel angles.

4. A tubular cooler according to claim 2, characterized in that: The working end of the linear drive (335) is arranged to move in a vertical direction. The linear drive (335) is fixedly mounted below the mounting seat (32). The mounting seat (32) is provided with a through hole (321) which is in the same straight line as the driving gear (331). The working end of the linear drive (335) passes through the through hole (321) to contact the bottom end of the spline shaft (334).

5. The tubular cooler according to claim 2, characterized in that: A ball (338) is rotatably mounted at a position where the bottom end of the spline shaft (334) contacts the working end of the linear drive (335), and the surface of the ball (338) protrudes from the bottom surface of the spline shaft (334).

6. The tubular cooler according to claim 2, characterized in that: A drawer box (442) is slidably mounted in the slag collecting box (441).

7. The tubular cooler according to claim 2, characterized in that: A plugging head (251) is installed at the cooling chamber connecting pipe (25) on the cooling pipe (2) that is not connected to the connecting pipe (3), and the plugging head (251) is used to plug the cooling chamber connecting pipe (25).

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