Low-temperature viscous medium stirring and pushing device

Abstract

The invention belongs to the technical field of heat exchange equipment, and particularly relates to a low-temperature viscous medium stirring and pushing device which comprises a heat preservation oil tank and a pushing heat exchange mechanism, the pushing heat exchange mechanism is installed in the heat preservation oil tank, and the pushing heat exchange mechanism is used for pushing a medium and conducting heat exchange on the medium. The pushing heat exchange mechanism comprises a pushing pipe, a piston plate, stirring blades and heat exchange pieces. By arranging the heat exchange pieces in the shape of the elastic bolt blades and matching with the core pipe, the flowing path of a medium in the heat preservation oil tank is limited, on one hand, the cooling effect on the medium is effectively enhanced by increasing the contact area, and on the other hand, through the deformable setting of the heat exchange pieces, the heat exchange efficiency is improved. The size of a gap of a flowing channel of the medium can be adjusted, and the probability of medium blockage is effectively reduced by matching with booster pumping of the piston plate to the medium.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchange equipment, in particular to a low-temperature viscous medium stirring and pushing device. Background Art

[0002] In a heat exchange system, heat transfer media is used to exchange and transfer heat, thereby achieving efficient use of energy. The selection of heat transfer media is crucial because it directly affects the efficiency and operating costs of the system. Common heat transfer media include water, oil, steam, and air.

[0003] Among them, when oil heat exchange media is used in a low-temperature environment, it will be affected by temperature, which will lead to a decrease in the internal energy between molecules and an increase in the constraints of the intermolecular forces, which is intuitively manifested as an increase in the viscosity and viscosity of the heat exchange medium. Since the three main modes of heat transfer are heat conduction, heat convection and heat radiation, the heat transfer modes of fluid media are mainly heat conduction and heat convection, and among them, heat convection has a greater impact on the heat transfer efficiency in the fluid. When the texture of the heat exchange medium becomes gradually viscous and the viscosity gradually increases, the flow efficiency of the heat exchange medium will be reduced, the heat convection effect will be reduced, and then the heat exchange effect of the heat exchange medium will be reduced. Especially when the heat exchange equipment itself has a limited volume, a large heat exchange area, and a narrow heat exchange medium flow channel, the viscous heat exchange medium in a low temperature state not only has a low heat exchange efficiency, but is also prone to blockage and other problems.

[0004] The related technology discloses a heat exchange system for viscous substances under low temperature conditions, with application number CN2020212805958. This scheme rotates a spiral device to scrape off the cooled medium adhering to the wall of the capillary tube, thereby increasing the efficiency of heat conduction, improving the speed of heat convection, and achieving better heat transfer effects. However, the heat exchange area in this scheme is small. In actual application, due to the limitation of the heat exchange medium flow channel, the heat transfer efficiency of the heat exchange system will still be low, and it may even be affected by blockage and other problems, resulting in the equipment being unable to be used normally.

[0005] In view of this, the present invention proposes a low-temperature viscous medium stirring and pushing device to solve the above technical problems. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a low-temperature viscous medium stirring and pushing device.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a low-temperature viscous medium stirring and pushing device described in the present invention comprises a heat-insulating oil tank and a pushing heat exchange mechanism;

[0008] The thermal insulation oil tank is equipped with a jacket with a cold evaporator, and the thermal insulation oil tank is used to cool the oil in the inner cavity. A one-way liquid outlet pipe is installed at the bottom of the thermal insulation oil tank;

[0009] The push heat exchange mechanism is installed in the thermal insulation oil tank, and is used to push the medium and perform heat exchange on the medium. The push heat exchange mechanism includes a push pipe, a piston plate, a stirring blade and a heat exchange plate;

[0010] The push pipe is fixedly installed in the insulated oil tank, a liquid inlet hole is opened on the push pipe, the push pipe is conductively connected to the inner cavity of the insulated oil tank, and the push pipe is conductively connected to the medium pumping system through the liquid inlet hole;

[0011] A piston plate is slidably installed in the push tube, a stirring blade is rotatably installed at one end of the push tube facing the thermal insulation oil tank, the piston plate and the stirring blade are externally connected to a driving mechanism, and a plurality of one-way valves are installed on the piston plate;

[0012] The heat exchange plate is installed in the insulated oil tank. The heat exchange plate is made of elastic spiral blades. The heat exchange plate is hollow. The inner cavity of the heat exchange plate is conductively connected with the jacket cavity. A core tube is rotatably installed in the insulated oil tank, and the heat exchange plate is sleeved on the outside of the core tube.

[0013] Preferably, the driving mechanism includes a nut, a lead screw and a driving motor, the nut and the lead screw are installed in the pushing tube, the nut is fixedly mounted on the pushing tube, the lead screw and the nut constitute a spiral transmission pair, the driving motor is fixedly mounted on the pushing tube, a square rod is fixedly mounted on the output end of the driving motor, a lifting groove is provided at the top of the lead screw, the square rod extends into the lifting groove, and the piston plate and the stirring blade are fixedly mounted on the lead screw.

[0014] Preferably, it further comprises a gap adjustment mechanism, wherein the gap adjustment mechanism comprises a lifting plate and an adjustment bolt;

[0015] A lifting plate is slidably installed inside the insulated oil tank, one end of the heat exchange plate is fixedly installed on the lifting plate, and an adjusting bolt is threadedly connected to the insulated oil tank. The adjusting bolt extends into the insulated oil tank and is rotatably connected to the lifting plate.

[0016] Preferably, a scale is fixedly mounted on the thermal insulation oil tank, the scale is flush with the adjusting bolt, and the scale is used to display the size of the gap between the heat exchange plates.

[0017] Preferably, evenly distributed scrapers are fixedly mounted on the core tube, the scrapers extend into the spiral gaps of the heat exchanger fins, the scrapers are used to scrape the surfaces of the heat exchanger fins, and the core tube is fixedly connected to the stirring blades.

[0018] Preferably, the scraper comprises a rod body, a scraper blade and a filter screen;

[0019] The rod body is a tubular structure, a through groove is provided in the length direction of the rod body, a scraper blade of symmetrical design is installed on the rod body, and a filter screen is fixedly installed on the side of the through groove away from the scraper blade.

[0020] Preferably, the scraper blade is hingedly mounted on the rod body, and the two scrapers are elastically connected by a tension spring.

[0021] Preferably, a connecting pipe is fixedly installed in the insulated oil tank, the core pipe is sleeved on the end of the connecting pipe, the connecting pipe is made of a telescopic tube body, the connecting pipe extends to the outside of the insulated oil tank, and a sealing cover is detachably installed on the connecting pipe outside the insulated oil tank, an elastic pull rod is fixedly installed on the sealing cover, the elastic pull rod extends into the inner cavity of the rod body, a cleaning plug is fixedly installed at one end of the elastic pull rod in the inner cavity of the rod body, the cleaning plug is made of elastic material, the cleaning plug is conically designed, and as the distance between the cleaning plug and the core tube approaches, the diameter of the cleaning plug gradually increases.

[0022] Preferably, a blocking piece is fixedly installed on one side of the two scrapers close to each other, and in an initial state, the two blocking pieces are closed to block the through groove.

[0023] Preferably, when the core tube moves toward the connecting tube, the scrapers separate from each other;

[0024] When the core tube moves toward the push tube, the scrapers approach each other under the action of the tension spring.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. The low-temperature viscous medium stirring and pushing device described in the present invention restricts the flow path of the medium in the insulated oil tank by setting a heat exchange plate in the shape of an elastic bolt blade and matching it with a core tube. On the one hand, the increase in contact area is utilized to effectively enhance the temperature reduction and cooling effect on the medium. On the other hand, the heat exchange plate is deformed so that the size of the flow channel gap of the medium can be adjusted, and the piston plate is used to pump the medium with pressure, effectively reducing the probability of medium blockage.

[0027] 2. In the low-temperature viscous medium stirring and pushing device described in the present invention, the scraper scrapes the surface of the heat exchanger plate, and the medium in the gap between the heat exchanger plates and the impurities scraped off all pass through the through groove, flow into the inner cavity of the rod body, and flow out from the other end of the through groove. In this process, the filter screen intercepts the solid impurities, thereby maintaining the heat exchanger plate, and reducing the rate at which the heat exchange efficiency of the heat exchanger plate decreases during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 is a stereogram of the present invention;

[0030] Figure 2 is a three-dimensional diagram of the driving mechanism of the present invention;

[0031] Figure 3 It is a three-dimensional diagram of the assembly of the heat exchange plate and the lifting plate in the present invention;

[0032] Figure 4 is a cross-sectional view of the present invention;

[0033] Figure 5 It is a three-dimensional picture of the scraper;

[0034] Figure 6 is a cross-sectional view of the scraper;

[0035] Figure 7 It is a stereoscopic diagram of the assembly of the elastic pull rod and the cleaning plug;

[0036] In the figure: 1. Insulated oil tank; 11. Jacket; 12. One-way liquid outlet pipe; 2. Push pipe; 21. Liquid inlet hole; 22. Piston plate; 23. Stirring blade; 24. One-way valve; 25. Heat exchange plate; 26. Core tube; 3. Nut; 31. Screw; 32. Drive motor; 33. Square rod; 34. Lifting slot; 4. Lifting plate; 41. Adjusting bolt; 42. Scale; 5. Scraper; 51. Rod body; 52. Scraper; 53. Filter; 54. Through slot; 55. Tension spring; 6. Connecting pipe; 61. Sealing cover; 62. Elastic pull rod; 63. Cleaning plug; 64. Baffle. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0038] like Figures 1 to 7 As shown, a low-temperature viscous medium stirring and pushing device according to the present invention comprises a heat-insulating oil tank 1 and a pushing and heat-exchanging mechanism;

[0039] The thermal insulation oil tank 1 is provided with a jacket 11 with a cold evaporator, and the thermal insulation oil tank 1 is used to cool the oil in the inner cavity, and a one-way liquid outlet pipe 12 is provided at the bottom of the thermal insulation oil tank 1;

[0040] The push heat exchange mechanism is installed in the insulated oil tank 1, and is used to push the medium and perform heat exchange on the medium. The push heat exchange mechanism includes a push pipe 2, a piston plate 22, a stirring blade 23 and a heat exchange plate 25;

[0041] The push pipe 2 is fixedly installed in the insulated oil tank 1, and a liquid inlet hole 21 is opened on the push pipe 2. The push pipe 2 is conductively connected to the inner cavity of the insulated oil tank 1, and the push pipe 2 is conductively connected to the medium pumping system through the liquid inlet hole 21;

[0042] A piston plate 22 is slidably installed in the push tube 2, and a stirring blade 23 is rotatably installed at one end of the push tube 2 facing the thermal insulation oil tank 1. The piston plate 22 and the stirring blade 23 are externally connected to a driving mechanism, and a plurality of one-way valves 24 are installed on the piston plate 22;

[0043] The heat exchange plate 25 is installed in the insulated oil tank 1. The heat exchange plate 25 is made of elastic spiral blades. The heat exchange plate 25 is hollow. The inner cavity of the heat exchange plate 25 is conductively connected to the cavity of the jacket 11. A core tube 26 is rotatably installed in the insulated oil tank 1, and the heat exchange plate 25 is sleeved on the outside of the core tube 26.

[0044] The driving mechanism includes a nut 3, a lead screw 31 and a driving motor 32. The nut 3 and the lead screw 31 are installed in the pushing tube 2. The nut 3 is fixedly mounted on the pushing tube 2. The lead screw 31 and the nut 3 form a spiral transmission pair. The driving motor 32 is fixedly mounted on the pushing tube 2. A square rod 33 is fixedly mounted on the output end of the driving motor 32. A lifting groove 34 is opened at the top of the lead screw 31. The square rod 33 extends into the lifting groove 34. The piston plate 22 and the stirring blade 23 are both fixedly mounted on the lead screw 31.

[0045] When engine oil and lubricating oil are refrigerated and cooled, their texture becomes viscous under the influence of temperature as the temperature decreases, and the fluidity of medium such as engine oil and lubricating oil in a viscous state decreases, causing their heat exchange efficiency in the heat exchange device to be greatly reduced. In order to enhance the heat exchange efficiency of viscous medium in a low temperature state during the heat exchange process, the present invention improves the heat exchange efficiency of the medium during the medium pushing process by providing a pushing heat exchange component.

[0046] Specifically, in the present invention, the medium is mainly stored in the medium pumping system. During the medium heat exchange process, the medium is input into the push pipe 2 by the medium pumping system. The push pipe 2 is equipped with a piston plate 22 and a stirring blade 23 started by a driving mechanism. In the present invention, the driving mechanism mainly includes a nut 3, a screw 31 and a driving motor 32. After the driving motor 32 is started, its output end performs periodic forward and reverse rotation according to a preset degree, thereby driving the square rod 33 fixedly installed at the end to perform periodic forward and reverse rotation. The square rod 33 is slidably installed in a lifting groove 34 opened at the end of the screw 31. Due to the shape of the square rod 33 and the lifting groove 34, when the output end of the driving motor 32 drives the square rod 33 to rotate, it synchronously drives the screw 31 to rotate. The nut 3 is fixedly mounted on the push tube 2, and the nut 3 and the lead screw 31 form a spiral transmission pair. Therefore, when the nut 3 is fixed and the lead screw 31 rotates, the lead screw 31 will also produce axial linear motion compared to the nut 3, so that the square rod 33 slides in the lifting groove 34, and the piston plate 22 and the stirring blade 23 fixedly mounted on the lead screw 31 rotate and move linearly at the same time. When the piston plate 22 moves away from the liquid inlet hole 21, the medium is pumped to one end of the push tube 2 with the cooperation of the medium pumping system. Then, when the driving motor 32 changes the rotation direction, the linear motion direction of the piston plate 22 changes, thereby increasing the pressure of the medium pumped into the push tube 2. Under the action of the pressure, the piston The one-way valve 24 on the plate 22 is opened, allowing the medium to pass over the piston plate 22 and flow toward the insulating oil tank 1. During the periodic reciprocating motion of the piston plate 22, the medium is continuously pushed into the inner cavity of the insulating oil tank 1, and during the flow, the medium is continuously stirred by the rotating stirring blades 23, thereby making the texture of the medium transported to the insulating oil tank 1 uniform. The heat exchange plate 25 and the core tube 26 installed in the insulating oil tank 1 cooperate with the inner wall of the insulating oil tank 1 to form a spiral conveying channel. Under the action of pressure, the medium flows along the spiral conveying channel to the one-way liquid outlet pipe 12. In this process, the medium passes through the heat exchange plate 25 and exchanges heat with the cold evaporating agent inside the heat exchange plate 25, causing the medium temperature to decrease. It should be noted that in the present invention, The heat exchanger 25 is composed of elastic spiral blades, so that the contact area between the medium and the heat exchanger 25 is larger and the flow gap is smaller. During the flow of the medium, when the spiral conveying channel is blocked, the heat exchanger 25 will be pushed to deform under the action of pressure, thereby changing the size of the flow gap. When the pumping pressure is reduced, the heat exchanger 25 will restore its deformation under the elastic action of the heat exchanger 25 itself, thereby maintaining the heat exchange effect on the medium. The diameter of the heat exchanger 25 in the initial state is smaller than the inner diameter of the insulation oil tank 1, and the inner diameter of the heat exchanger 25 is larger than the outer diameter of the core tube 26. In this embodiment, the distance between the heat exchanger 25 and the inner wall of the insulation oil tank 1 and the outer wall of the core tube 26 is preferably 1-2mm. The existence of the gap can control the deformation degree of the heat exchanger 25,It can also reduce the probability of the medium flow channel being completely blocked.

[0047] The present invention restricts the flow path of the medium in the insulated oil tank 1 by providing a heat exchange plate 25 in the shape of an elastic bolt blade and a core tube 26. On the one hand, the increase in contact area is utilized to effectively enhance the temperature reduction and cooling effect on the medium. On the other hand, the heat exchange plate 25 is deformable, so that the size of the gap in the flow channel of the medium can be adjusted, and the piston plate 22 cooperates with the booster pumping of the medium to effectively reduce the probability of medium blockage.

[0048] As a preferred embodiment of the present invention, it also includes a gap adjustment mechanism, and the gap adjustment mechanism includes a lifting plate 4 and an adjustment bolt 41;

[0049] A lifting plate 4 is slidably installed inside the insulated oil tank 1, one end of the heat exchange plate 25 is fixedly installed on the lifting plate 4, and an adjusting bolt 41 is threadedly connected to the insulated oil tank 1. The adjusting bolt 41 extends into the insulated oil tank 1 and is rotatably connected to the lifting plate 4.

[0050] A scale 42 is fixedly mounted on the thermal insulation oil tank 1 . The scale 42 is flush with the adjusting bolt 41 . The scale 42 is used to display the gap size of the heat exchange fins 25 .

[0051] Since the viscosity of different media changes to different degrees under temperature changes, in order to ensure the cooling effect on the medium and reduce the probability of equipment blockage, a gap adjustment mechanism is provided in the present invention. When adjusting the gap of the heat exchange plate 25 due to blockage, replacement of the heat exchange medium, etc. before the device is put into use or after long-term use, the staff uses a tool to adjust the gap of the heat exchange plate 25. Since the adjusting bolt 41 is threadedly connected to the insulated oil tank 1, when the adjusting bolt 41 is rotated, its length in the insulated oil tank 1 will change, thereby causing the lifting plate 4 to rise or fall, thereby causing the height of the accommodating chamber of the heat exchange plate 25 to change, so that the gap size of the heat exchange plate 25 is adjusted. During the adjustment process, the scale 42 marked with scales can provide a reference for the staff, so that the staff can judge the gap size of the heat exchange plate 25 in the insulated oil tank 1 in real time, so that the device is more in line with the medium heat exchange process.

[0052] As a preferred embodiment of the present invention, evenly distributed scrapers 5 are fixedly installed on the core tube 26 , and the scrapers 5 extend into the spiral gap of the heat exchange plate 25 . The scrapers 5 are used to scrape the surface of the heat exchange plate 25 , and the core tube 26 is fixedly connected to the stirring blade 23 .

[0053] The scraper 5 includes a rod body 51, a scraper blade 52 and a filter screen 53;

[0054] The rod body 51 is a tubular structure, and a through groove 54 is formed in the length direction of the rod body 51 . A symmetrically designed scraper 52 is mounted on the rod body 51 . A filter screen 53 is fixedly mounted on the side of the through groove 54 away from the scraper 52 .

[0055] The scraper blade 52 is hingedly mounted on the rod body 51 , and the two scrapers 5 are elastically connected by a tension spring 55 .

[0056] In order to reduce the problem of impurities in the medium being precipitated and attached to the surface of the heat exchanger fin 25 after the heat exchanger fin 25 has been used for a long time, thereby affecting the heat exchange efficiency, a scraper 5 is provided in the present invention. Since the core tube 26 is fixedly connected to the stirring blade 23, and the stirring blade 23 is fixedly installed on the screw 31, when the screw 31 moves, the core tube 26 is driven to move synchronously, that is, under the action of the drive motor 32, the core tube 26 simultaneously rotates and moves linearly in the insulation oil tank 1, so that the scraper 5 fixedly installed on the core tube 26 moves in the spiral gap of the heat exchanger fin 25. The scraper blades 52 of the component 5 are in an open state under the action of the tension spring 55, so the two scraper blades 52 are in contact with the upper and lower surfaces of the spiral gap respectively. When the scraper 5 moves, the scraper blades 52 scrape the surface of the heat exchange plate 25, and the medium in the gap of the heat exchange plate 25 and the scraped impurities all pass through the through groove 54, flow into the inner cavity of the rod body 51, and flow out from the other end of the through groove 54. In this process, the filter screen 53 intercepts the solid impurities, thereby maintaining the heat exchange plate 25, and reducing the rate at which the heat exchange efficiency of the heat exchange plate 25 decreases during long-term use.

[0057] As a preferred embodiment of the present invention, a connecting pipe 6 is fixedly installed in the insulated oil tank 1, the core pipe 26 is sleeved on the end of the connecting pipe 6, the connecting pipe 6 is made of a telescopic tube body, the connecting pipe 6 extends to the outside of the insulated oil tank 1, and the connecting pipe 6 is detachably installed with a sealing cover 61 outside the insulated oil tank 1, an elastic pull rod 62 is fixedly installed on the sealing cover 61, the elastic pull rod 62 extends into the inner cavity of the rod body 51, and a cleaning plug 63 is fixedly installed at one end of the elastic pull rod 62 in the inner cavity of the rod body 51, the cleaning plug 63 is made of elastic material, the cleaning plug 63 is conically designed, and as the cleaning plug 63 approaches the core pipe 26, the diameter of the cleaning plug 63 gradually increases.

[0058] A blocking piece 64 is fixedly installed on one side of the two scrapers 5 close to each other. In an initial state, the two blocking pieces 64 are closed to block the through-groove 54 .

[0059] When the core tube 26 moves toward the connecting tube 6, the scrapers 52 separate from each other under the action of friction;

[0060] When the core tube 26 moves toward the push tube 2 , the scrapers 52 move closer to each other under the action of the tension spring 55 .

[0061] In order to further enhance the maintenance effect of the device, the present invention is further provided with a cleaning plug 63 and an elastic pull rod 62. When the core tube 26 performs a linear up and down motion, when the distance between the core tube 26 and the sealing cover 61 at the end of the connecting tube 6 increases, the core tube 26 moves toward the push tube 2. The scrapers 52 are moved closer to each other under the action of the tension spring 55 and the blocking action of the medium, so that the baffles 64 on the scraper 5 are moved closer to each other. At this time, the baffles 64 block the opening of the through groove 54. Since the length of the elastic pull rod 62 is constant, as the core tube 26 continues to move, the elastic pull rod 62 pulls the cleaning plug 63 and moves toward the core tube 26. Under the action of the conical structure of the cleaning plug 63, the cleaning plug 63 pushes the solid impurities retained in the filter screen 53 and the inner cavity of the rod body 51 into the inner cavity of the core tube 26. When the lead screw 31 After rising to the top, the screw 31 moves in the opposite direction, forcing the core tube 26 to move toward the connecting tube 6. Since the inclination direction of the scraper 52 is opposite to the movement direction of the scraper 52 at this time, the scraper 52 moves away from each other and opens. The opened scraper 52 scrapes the heat exchange plate 25, and the through groove 54 is opened, thereby continuously filtering and intercepting impurities. The above operation is repeated. During long-term use, impurities entering the insulated oil tank 1 or generated in the insulated oil tank 1 will be concentrated in the inner cavity of the core tube 26. Since the inner cavity of the core tube 26 is connected to the connecting tube 6, when the device is maintained or serviced, the staff manually opens the sealing cover 61 to clean the impurities in the inner cavity of the connecting tube 6 and the core tube 26. The device can be continuously cleaned during operation to maintain the heat exchange effect of the device.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low-temperature viscous medium stirring and pushing device, comprising a heat-insulating oil tank (1) and a pushing and heat-exchanging mechanism; The thermal insulation oil tank (1) is provided with a jacket (11) with a self-contained cold evaporator, the thermal insulation oil tank (1) is used to cool the oil in the inner cavity, and a one-way liquid outlet pipe (12) is provided at the bottom of the thermal insulation oil tank (1); Features: The push heat exchange mechanism is installed in the heat-insulating oil tank (1), and is used to push the medium and perform heat exchange on the medium. The push heat exchange mechanism comprises a push pipe (2), a piston plate (22), a stirring blade (23), and a heat exchange plate (25); The push pipe (2) is fixedly installed in the heat-insulating oil tank (1), a liquid inlet hole (21) is opened on the push pipe (2), the push pipe (2) is conductively connected to the inner cavity of the heat-insulating oil tank (1), and the push pipe (2) is conductively connected to the medium pumping system through the liquid inlet hole (21); A piston plate (22) is slidably mounted in the push tube (2); a stirring blade (23) is rotatably mounted at one end of the push tube (2) facing the heat preservation oil tank (1); the piston plate (22) and the stirring blade (23) are externally connected to a driving mechanism; and a plurality of one-way valves (24) are mounted on the piston plate (22); The heat exchange plate (25) is installed in the thermal insulation oil tank (1). The heat exchange plate (25) is made of elastic spiral blades. The heat exchange plate (25) is hollow. The inner cavity of the heat exchange plate (25) is conductively connected to the cavity of the jacket (11). A core tube (26) is rotatably installed in the thermal insulation oil tank (1), and the heat exchange plate (25) is sleeved on the outside of the core tube (26).

2. A low-temperature viscous medium stirring and pushing device according to claim 1, characterized in that: The driving mechanism comprises a nut (3), a lead screw (31) and a driving motor (32); the nut (3) and the lead screw (31) are installed in the pushing tube (2); the nut (3) is fixedly mounted on the pushing tube (2); the lead screw (31) and the nut (3) form a spiral transmission pair; the driving motor (32) is fixedly mounted on the pushing tube (2); a square rod (33) is fixedly mounted on the output end of the driving motor (32); a lifting groove (34) is provided at the top end of the lead screw (31); the square rod (33) extends into the lifting groove (34); the piston plate (22) and the stirring blade (23) are both fixedly mounted on the lead screw (31).

3. A low-temperature viscous medium stirring and pushing device according to claim 2, characterized in that: It also includes a gap adjustment mechanism, which includes a lifting plate (4) and an adjustment bolt (41); A lifting plate (4) is slidably mounted inside the thermal insulation oil tank (1), one end of the heat exchange plate (25) is fixedly mounted on the lifting plate (4), an adjusting bolt (41) is threadedly connected to the thermal insulation oil tank (1), and the adjusting bolt (41) extends into the thermal insulation oil tank (1) and is rotatably connected to the lifting plate (4).

4. A low-temperature viscous medium stirring and pushing device according to claim 3, characterized in that: A scale (42) is fixedly mounted on the thermal insulation oil tank (1), the scale (42) is flush with the adjustment bolt (41), and the scale (42) is used to display the size of the gap between the heat exchange plates (25).

5. A low-temperature viscous medium stirring and pushing device according to claim 2 or 4, characterized in that: The core tube (26) is fixedly mounted with evenly distributed scrapers (5), the scrapers (5) extending into the spiral gap of the heat exchange fins (25), the scrapers (5) being used to scrape the surface of the heat exchange fins (25), and the core tube (26) is fixedly connected to the stirring blades (23).

6. A low-temperature viscous medium stirring and pushing device according to claim 5, characterized in that: The scraper (5) comprises a rod body (51), a scraper blade (52) and a filter screen (53); The rod body (51) is a tubular structure, a through groove (54) is provided in the length direction of the rod body (51), a scraper blade (52) of symmetrical design is installed on the rod body (51), and a filter screen (53) is fixedly installed on the side of the through groove (54) away from the scraper blade (52).

7. A low-temperature viscous medium stirring and pushing device according to claim 6, characterized in that: The scraper blade (52) is hingedly mounted on the rod body (51), and the two scrapers (5) are elastically connected by a tension spring (55).

8. A low-temperature viscous medium stirring and pushing device according to claim 7, characterized in that: A connecting pipe (6) is fixedly installed in the insulated oil tank (1), the core pipe (26) is sleeved on the end of the connecting pipe (6), the connecting pipe (6) is made of a telescopic tube body, the connecting pipe (6) extends to the outside of the insulated oil tank (1), the connecting pipe (6) is detachably installed with a sealing cover (61) outside the insulated oil tank (1), an elastic pull rod (62) is fixedly installed on the sealing cover (61), the elastic pull rod (62) extends into the inner cavity of the rod body (51), a cleaning plug (63) is fixedly installed at one end of the elastic pull rod (62) located in the inner cavity of the rod body (51), the cleaning plug (63) is made of elastic material, the cleaning plug (63) is designed to be conical, and as the distance between the cleaning plug (63) and the core pipe (26) approaches, the diameter of the cleaning plug (63) gradually increases.

9. A low-temperature viscous medium stirring and pushing device according to claim 8, characterized in that: A blocking piece (64) is fixedly mounted on one side of the two scrapers (5) close to each other. In an initial state, the two blocking pieces (64) are closed to block the through-groove (54).

10. A low-temperature viscous medium stirring and pushing device according to claim 8, characterized in that: When the core tube (26) moves toward the connecting tube (6), the scrapers (52) separate from each other; When the core tube (26) moves toward the push tube (2), the scrapers (52) move closer to each other under the action of the tension spring (55).

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