Anti-crystallization heating and stirring treatment equipment for oleic acid raw material

Abstract

The invention belongs to the technical field of stirring, and discloses an oleic acid raw material anti-crystallization heating stirring treatment equipment, which comprises a stirring shell, the outer wall of the bottom end of the stirring shell is fixedly connected with a support frame, the bottom of the stirring shell is communicated with an intelligent discharge pipeline, and the oleic acid raw material is stirred when a turbo-type four-blade inclined blade rotates. The flowing of the oleic acid raw material can generate an annular vortex due to the rotation of the turbo-type four-blade inclined blade. Rotary annular flow may be formed at the contact position of the inner wall of the stirring shell and the oleic acid raw material, so that the oleic acid raw material rotates along the inner wall of the stirring shell, and the uniformity of the oleic acid raw material is promoted. In the rotating process of the rotating shaft, a stirring piece in the stirring assembly is made to do lifting motion, an oleic acid raw material is slightly disturbed, a rotating sleeve is rotated by a cross roller during lifting, the rotating sleeve can drive the stirring piece to rotate, the oleic acid raw material is stirred when the stirring piece rotates, finer stirring is facilitated, and the stirring efficiency is improved. The uniformity of the oleic acid raw material is further promoted.

Description

Technical Field

[0001] This invention belongs to the field of stirring technology, specifically a heating and stirring device for preventing crystallization of oleic acid raw materials. Background Technology

[0002] An anti-crystallization heating and stirring treatment device for oleic acid raw materials is typically used to process oleic acid or other easily crystallizing raw materials. It prevents crystallization during processing by heating and stirring. Oleic acid, a commonly used fatty acid, is frequently used in the food and chemical industries; however, it may crystallize at low temperatures, affecting product quality and processing efficiency.

[0003] Existing technologies typically employ stirred tanks to stir and heat oleic acid raw materials. In this process, a heating jacket is usually used to heat the raw material within the inner wall of the tank. However, the inner wall at the top of the heating jacket cannot come into contact with the oleic acid raw material. As the heating jacket continues to heat up, it will overheat when it cannot be cooled by the oleic acid raw material, which may affect the properties of the raw material and cause it to deteriorate. Summary of the Invention

[0004] To address the problem of overheating in the heating jacket mentioned in the background art, where overheating may occur at the top of the heating jacket, the overheated area may not be able to adjust the temperature in a timely and effective manner, leading to local crystallization of the oleic acid raw material, affecting its fluidity, and thus reducing the processing effect, this invention provides an anti-crystallization heating and stirring treatment device for oleic acid raw materials.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an anti-crystallization heating and stirring treatment device for oleic acid raw materials, comprising a stirring shell, a support frame fixedly connected to the bottom outer wall of the stirring shell, an intelligent discharge pipe connected to the bottom of the stirring shell, a top cover fixedly connected to the top of the stirring shell, a feed component connected to one side of the top of the top cover, and a heating and stirring mechanism, the heating and stirring mechanism comprising a motor fixedly connected to the top of the stirring shell, a rotating shaft fixedly connected to the output end of the motor, a turbine-type four-bladed oblique blade fixedly connected to the bottom outer wall of the rotating shaft, a heating jacket fixedly connected to the inner wall of the stirring shell, and a stirring assembly provided on the outer wall of the rotating shaft for uniformly stirring the oleic acid.

[0006] Preferably, the stirring assembly includes a main gear fixedly connected to the outer wall of the top end of the rotating shaft, four secondary gears meshing with the outer wall of the main gear, and a fixed block rotatably connected to the inner wall of the secondary gear.

[0007] Preferably, the top of the fixing block is fixedly connected to the bottom of the top cover, the bottom of the secondary gear is fixedly connected to a circular block, the bottom of the circular block is fixedly connected to a cross roller, and the middle of the outer wall of the rotating shaft is fixedly connected to a reciprocating lead screw.

[0008] Preferably, the reciprocating lead screw has a threaded block threaded to its outer wall, a storage shell is fixedly connected to the outer wall of the threaded block, and four connecting rods are fixedly connected to the bottom of the storage shell.

[0009] Preferably, a fixing ring is fixedly connected to the end of the connecting rod away from the storage shell, a rotating sleeve is rotatably connected to the inner wall of the fixing ring, the inner wall of the rotating sleeve is slidably connected to the outer wall of one end of the cross roller, and a stirring element is fixedly connected to the bottom of the rotating sleeve.

[0010] Preferably, the bottom of the top cover is provided with a spraying assembly, which includes four fixed rods fixedly connected to the bottom of the top cover, and an annular piston plate fixedly connected to the bottom of the fixed rods.

[0011] Preferably, the outer wall of the annular piston plate is slidably connected to the inner wall of the storage shell, and four bent pipes are respectively connected to the top of the annular piston plate near the fixed rod, and the top of the bent pipes are connected to an annular spraying element.

[0012] Preferably, the top of the annular spraying component is fixedly connected to the bottom of the top cover, and four sealing rods are fixedly connected to the bottom of the annular piston plate, with one end of each sealing rod penetrating the storage shell and extending to the outside of the storage shell.

[0013] Preferably, the outer wall of the fixed ring is provided with a lifting assembly, the lifting assembly including a bent rod fixedly connected to one end of the outer wall of the fixed ring, the top end of the bent rod being fixedly connected to an annular frame plate, the outer wall of the annular frame plate being fixedly connected to a sponge ring, and the outer wall of the sponge ring contacting the inner wall of the heating jacket.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] This invention utilizes a stirring assembly. The sealing element of the feed component is removed, and oleic acid raw material is simultaneously poured into the stirring shell through the feed component. The motor is started, and the heating jacket is activated simultaneously. The heating jacket heats the oleic acid raw material inside the stirring shell. The motor drives the rotating shaft to rotate, which in turn drives the turbine-type four-bladed oblique blades. The rotation of the turbine-type four-bladed blades agitates the oleic acid raw material, creating a ring-shaped vortex. At the contact point between the inner wall of the stirring shell and the oleic acid raw material, a rotating ring-shaped flow may form, causing the oleic acid raw material to rotate along the inner wall of the stirring shell, promoting the uniformity of the oleic acid raw material. During the rotation of the rotating shaft, the stirring element in the stirring assembly moves up and down, slightly agitating the oleic acid raw material. Furthermore, the rotation of the cross roller during the lifting and lowering of the rotating sleeve allows the rotating sleeve to drive the stirring element to rotate. The rotation of the stirring element agitates the oleic acid raw material, contributing to finer mixing and further promoting the uniformity of the oleic acid raw material.

[0016] This invention, through the coordinated arrangement of a stirring component and a spraying component, allows the storage tank to align with an annular piston plate as it rises. At this point, the oleic acid material inside the storage tank is propelled into a curved tube by the sliding motion of the piston plate within the tank. The material then flows through the curved tube into an annular spray nozzle, which sprays the oleic acid onto the inner wall of the top heating jacket. This process heats the oleic acid material, preventing the top of the heating jacket from remaining constantly heated without contact with the oleic acid. This design effectively prevents overheating and energy waste, thus improving the overall energy efficiency and stability of the process. As the storage tank descends, it gradually separates from the annular piston plate. At this point, the falling storage tank enters the oleic acid raw material solution to store the oleic acid raw material. After stirring is completed, the intelligent discharge pipe is opened to discharge the oleic acid raw material outside the device. The storage tank continues to descend, and it no longer contacts the sealing rod at the bottom of the storage tank. At this point, the residual material inside the storage tank will be discharged into the stirring shell through the holes at the bottom of the storage tank, thus being successfully discharged outside the device.

[0017] This invention, through the coordinated arrangement of a stirring assembly and a lifting assembly, allows the fixed ring to rise, which in turn drives the bent rod to rise. The bent rod then drives the annular frame plate and the sponge ring to rise. As the sponge ring rises, it comes into contact with the sprayed oleic acid raw material. The sponge ring, having absorbed the oleic acid, continues to rise, ensuring comprehensive contact with the inner wall of the heated jacket top. This further reduces overheating at the top of the heating jacket and prevents overheating in any dead zones. Furthermore, as the fixed ring lowers the sponge ring, it comes into contact with the oleic acid raw material inside the stirring shell, preventing localized overheating of the sponge ring by the overheated heating jacket and improving the protection of the sponge ring. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall side structure of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the stirring shell structure of the present invention;

[0020] Figure 3 This is a schematic cross-sectional view of the turbine-type four-bladed oblique blade structure of the present invention;

[0021] Figure 4 For the present invention Figure 3 Enlarged view of A in the middle;

[0022] Figure 5 For the present invention Figure 3 Enlarged view of B in the middle;

[0023] Figure 6 This is a schematic diagram of the side structure of the bent rod of the present invention;

[0024] Figure 7 For the present invention Figure 6 Enlarged view of C in the middle;

[0025] Figure 8 For the present invention Figure 6 Enlarged view of D;

[0026] Figure 9 This is a bottom view schematic diagram of the main gear structure of the present invention;

[0027] Figure 10 This is a schematic cross-sectional view of the cross roller structure of the present invention.

[0028] In the diagram: 1. Mixing shell; 2. Support frame; 3. Intelligent discharge pipe; 4. Top cover; 5. Feeding component; 6. Heating and mixing mechanism; 61. Motor; 62. Rotating shaft; 63. Turbine-type four-bladed oblique blade; 64. Heating jacket; 65. Mixing assembly; 66. Spraying assembly; 67. Lifting assembly; 651. Main gear; 652. Fixed block; 653. Secondary gear; 654. Round block; 655. Cross roller; 656. Reciprocating screw; 657. Threaded block; 658. Storage shell; 659. Connecting rod; 6510. Fixed ring; 6511. Rotating sleeve; 6512. Mixing component; 661. Fixed rod; 662. Annular piston plate; 663. Bend; 664. Annular spraying component; 665. Sealing rod; 671. Bend; 672. Annular frame plate; 673. Sponge ring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 10 As shown, the present invention provides an anti-crystallization heating and stirring treatment device for oleic acid raw materials, including a stirring shell 1, a support frame 2 fixedly connected to the bottom outer wall of the stirring shell 1, an intelligent discharge pipe 3 connected to the bottom of the stirring shell 1, a top cover 4 fixedly connected to the top of the stirring shell 1, and a feed component 5 connected to one side of the top of the top cover 4, and also includes;

[0031] The heating and stirring mechanism 6 includes a motor 61 fixedly connected to the top of the stirring shell 1. The output end of the motor 61 is fixedly connected to a rotating shaft 62. A turbine-type four-bladed oblique blade 63 is fixedly connected to the outer wall of the bottom end of the rotating shaft 62. A heating jacket 64 is fixedly connected to the inner wall of the stirring shell 1. A stirring assembly 65 is provided on the outer wall of the rotating shaft 62 for uniformly stirring oleic acid.

[0032] Using the above method: After the sealing part of the feed piece 5 is pulled out, the oleic acid raw material is smoothly poured into the interior of the mixing shell 1 through the feed piece 5. Simultaneously with starting the motor 61, the heating jacket 64 is activated to heat the oleic acid raw material inside the mixing shell 1. The motor 61 drives the rotating shaft 62 to rotate, which in turn drives the turbine-type four-bladed oblique blade 63 to rotate. When the turbine-type four-bladed oblique blade 63 rotates, it effectively agitates the oleic acid raw material, promotes its flow, and forms an annular vortex during its rotation, thereby achieving uniform stirring and heating.

[0033] The stirring assembly 65 includes a main gear 651 fixedly connected to the outer wall of the top end of the rotating shaft 62. Four secondary gears 653 are respectively meshed on the outer wall of the main gear 651. A fixing block 652 is rotatably connected to the inner wall of the secondary gears 653.

[0034] The top of the fixed block 652 is fixedly connected to the bottom of the top cover 4, the bottom of the secondary gear 653 is fixedly connected to the round block 654, the bottom of the round block 654 is fixedly connected to the cross roller 655, and the middle of the outer wall of the rotating shaft 62 is fixedly connected to the reciprocating screw 656.

[0035] A threaded block 657 is threadedly connected to the outer wall of the reciprocating screw 656. A storage shell 658 is fixedly connected to the outer wall of the threaded block 657. Four connecting rods 659 are fixedly connected to the bottom of the storage shell 658.

[0036] A fixing ring 6510 is fixedly connected to the end of the connecting rod 659 away from the storage shell 658. A rotating sleeve 6511 is rotatably connected to the inner wall of the fixing ring 6510. The inner wall of the rotating sleeve 6511 is slidably connected to the outer wall of one end of the cross roller 655. A stirring component 6512 is fixedly connected to the bottom of the rotating sleeve 6511.

[0037] The above scheme employs the following method: Rotating shaft 62 drives the main gear 651 and secondary gear 653 to rotate, and secondary gear 653 in turn drives the circular block 654 and cross roller 655 to rotate. Simultaneously, rotating shaft 62 also drives the reciprocating screw 656 to rotate, thereby driving the threaded block 657 to perform reciprocating lifting and lowering motion. The threaded block 657 drives the storage shell 658 and connecting rod 659 to rise and fall together, and connecting rod 659 further drives the fixed ring 6510 and rotating sleeve 6511 to rise and fall. The rising and falling motion of the rotating sleeve 6511 causes a slight lifting and lowering disturbance in the stirring element 6512. At the same time, the rising and falling motion of the rotating sleeve 6511, influenced by the rotation of the cross roller 655, drives the stirring element 6512 to rotate. When rotating, the stirring element 6512 effectively agitates the oleic acid raw material, contributing to a finer mixing effect.

[0038] like Figures 1 to 10 As shown, a spray assembly 66 is provided at the bottom of the top cover 4. The spray assembly 66 includes four fixing rods 661 fixedly connected to the bottom of the top cover 4. An annular piston plate 662 is fixedly connected to the bottom of the fixing rods 661.

[0039] The outer wall of the annular piston plate 662 is slidably connected to the inner wall of the storage shell 658. The top of the annular piston plate 662 near the fixed rod 661 is connected to four bent pipes 663 respectively, and the top of the bent pipes 663 is connected to an annular spraying component 664.

[0040] The top of the annular spraying component 664 is fixedly connected to the bottom of the top cover 4. The bottom of the annular piston plate 662 is fixedly connected to four sealing rods 665. One end of the sealing rod 665 passes through the storage shell 658 and extends to the outside of the storage shell 658.

[0041] Using the above scheme: When the storage shell 658 rises, it docks with the annular piston plate 662. Subsequently, the oleic acid raw material inside the storage shell 658 is pushed smoothly into the bent pipe 663 by the sliding motion of the annular piston plate 662. The oleic acid raw material flows into the annular spray nozzle 664 through the bent pipe 663 and is sprayed onto the inner wall of the top of the heating jacket 64. The sprayed oleic acid raw material is heated by contact with the inner wall of the heating jacket 64, effectively preventing the top of the heating jacket 64 from being in an excessively high temperature state for a long time, thereby ensuring the uniformity and stability of the heating process.

[0042] The outer wall of the fixed ring 6510 is provided with a lifting component 67. The lifting component 67 includes a bent rod 671 fixedly connected to one end of the outer wall of the fixed ring 6510. The top end of the bent rod 671 is fixedly connected to an annular frame plate 672. The outer wall of the annular frame plate 672 is fixedly connected to a sponge ring 673. The outer wall of the sponge ring 673 contacts the inner wall of the heating jacket 64.

[0043] The above scheme is adopted as follows: When the fixed ring 6510 rises, it drives the bent rod 671 to rise together, which in turn drives the annular frame plate 672 and the sponge ring 673 to rise. During the rise of the sponge ring 673, it comes into contact with the sprayed oleic acid raw material and absorbs the oleic acid. After absorbing the oleic acid, the sponge ring 673 continues to rise and comes into full contact with the inner wall of the heated jacket 64, thereby effectively reducing the overheating phenomenon at the top of the heated jacket 64, preventing the heated jacket 64 from having excessively high temperatures in dead corners, and ensuring the uniformity and stability of the heating process.

[0044] Working principle and usage process of this invention:

[0045] The sealing part of the feed piece 5 is pulled out, and oleic acid raw material is poured into the interior of the mixing shell 1 through the feed piece 5. The motor 61 is started, and the heating jacket 64 is activated simultaneously. The heating jacket 64 heats the oleic acid raw material inside the mixing shell 1. The motor 61 drives the rotating shaft 62 to rotate, which in turn drives the turbine-type four-bladed oblique blade 63 to rotate. The rotation of the turbine-type four-bladed oblique blade 63 agitates the oleic acid raw material, and the flow of the oleic acid raw material generates annular vortices due to the rotation of the turbine-type four-bladed oblique blade 63. At the contact point between the inner wall of the mixing shell 1 and the oleic acid raw material, a rotating annular flow may form, causing the oleic acid raw material to rotate along the inner wall of the mixing shell 1, promoting the uniformity of the oleic acid raw material. The rotating shaft 62 drives the main gear 651 and the secondary gear 653 to rotate. The secondary gear 653 drives the circular block 654 and the cross roller 655 to rotate. At the same time, the rotating shaft 62 drives the reciprocating screw 656 to rotate. The reciprocating screw 656 drives the threaded block 657 to reciprocate and move up and down. The threaded block 657 drives the storage shell 658 and the connecting rod 659 to move up and down. The connecting rod 659 drives the fixed ring 6510 and the rotating sleeve 6511 to move up and down. The rotating sleeve 6511 drives the stirring element 6512 to move up and down, which slightly disturbs the oleic acid raw material. When the rotating sleeve 6511 moves up and down, it is affected by the rotation of the cross roller 655, which enables the rotating sleeve 6511 to drive the stirring element 6512 to rotate. When the stirring element 6512 rotates, it agitates the oleic acid raw material, which helps to finer agitate and further promotes the uniformity of the oleic acid raw material.

[0046] When the storage tank 658 rises, it aligns with the annular piston plate 662. At this time, the oleic acid material inside the storage tank 658 slides within the annular piston plate 662, allowing it to enter the curved pipe 663. The oleic acid material then enters the annular spray nozzle 664, spraying it onto the inner wall of the top heating jacket 64. This heats the oleic acid material, preventing the top of the heating jacket 64 from remaining under high temperature for extended periods without contact with the oleic acid material. This design effectively prevents overheating and energy waste. This design helps improve the energy efficiency and stability of the entire process. As the storage shell 658 descends, it gradually separates from the annular piston plate 662. At this time, the descending storage shell 658 enters the oleic acid raw material solution to store the oleic acid raw material. After stirring is completed, the intelligent discharge pipe 3 is opened to discharge the oleic acid raw material outside the device. At this time, the storage shell 658 continues to descend, and the storage shell 658 no longer contacts the sealing rod 665 at the bottom of the storage shell 658. At this time, the residual material inside the storage shell 658 will be discharged into the stirring shell 1 through the hole at the bottom of the storage shell 658, thus being successfully discharged outside the device.

[0047] When the fixed ring 6510 rises, it drives the bent rod 671 to rise, which in turn drives the annular frame plate 672 and the sponge ring 673 to rise. As the sponge ring 673 rises, it comes into contact with the sprayed oleic acid raw material. After absorbing the oleic acid raw material, the sponge ring 673 continues to rise, making full contact with the inner wall of the top of the heated jacket 64. This further reduces the overheating of the top of the heated jacket 64 and prevents overheating in any dead corners of the heated jacket 64. When the fixed ring 6510 drives the sponge ring 673 to fall, the falling sponge ring 673 comes into contact with the oleic acid raw material inside the stirring shell 1, preventing the overheated heating jacket 64 from causing localized overheating of the sponge ring 673 and improving the protection effect on the sponge ring 673.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heating and stirring treatment device for preventing crystallization of oleic acid raw materials, comprising a stirring shell (1), a support frame (2) fixedly connected to the outer wall of the bottom end of the stirring shell (1), an intelligent discharge pipe (3) connected to the bottom of the stirring shell (1), a top cover (4) fixedly connected to the top of the stirring shell (1), and a feed component (5) connected to one side of the top of the top cover (4), characterized in that: Also includes; The heating and stirring mechanism (6) includes a motor (61) fixedly connected to the top of the stirring shell (1), a rotating shaft (62) fixedly connected to the output end of the motor (61), a turbine-type four-bladed oblique blade (63) fixedly connected to the bottom outer wall of the rotating shaft (62), a heating jacket (64) fixedly connected to the inner wall of the stirring shell (1), and a stirring assembly (65) provided on the outer wall of the rotating shaft (62) for uniformly stirring oleic acid.

2. The anti-crystallization heating and stirring treatment equipment for oleic acid raw materials according to claim 1, characterized in that: The stirring assembly (65) includes a main gear (651) fixedly connected to the outer wall of the top end of the rotating shaft (62). The outer wall of the main gear (651) is respectively meshed with four secondary gears (653). The inner wall of the secondary gears (653) is rotatably connected with a fixing block (652).

3. The anti-crystallization heating and stirring treatment equipment for oleic acid raw materials according to claim 2, characterized in that: The top of the fixed block (652) is fixedly connected to the bottom of the top cover (4), the bottom of the secondary gear (653) is fixedly connected to a round block (654), the bottom of the round block (654) is fixedly connected to a cross roller (655), and the middle of the outer wall of the rotating shaft (62) is fixedly connected to a reciprocating screw (656).

4. The anti-crystallization heating and stirring treatment equipment for oleic acid raw materials according to claim 3, characterized in that: The reciprocating lead screw (656) is threadedly connected to a threaded block (657) on its outer wall. A storage shell (658) is fixedly connected to the outer wall of the threaded block (657). Four connecting rods (659) are fixedly connected to the bottom of the storage shell (658).

5. The anti-crystallization heating and stirring treatment equipment for oleic acid raw materials according to claim 4, characterized in that: A fixing ring (6510) is fixedly connected to one end of the connecting rod (659) away from the storage shell (658). A rotating sleeve (6511) is rotatably connected to the inner wall of the fixing ring (6510). The inner wall of the rotating sleeve (6511) is slidably connected to the outer wall of one end of the cross roller (655). A stirring component (6512) is fixedly connected to the bottom of the rotating sleeve (6511).

6. The anti-crystallization heating and stirring treatment equipment for oleic acid raw materials according to claim 4, characterized in that: The bottom of the top cover (4) is provided with a spray assembly (66), which includes four fixing rods (661) fixedly connected to the bottom of the top cover (4), and an annular piston plate (662) is fixedly connected to the bottom of the fixing rods (661).

7. The anti-crystallization heating and stirring treatment equipment for oleic acid raw materials according to claim 6, characterized in that: The outer wall of the annular piston plate (662) is slidably connected to the inner wall of the storage shell (658). The top of the annular piston plate (662) near the fixed rod (661) is connected to four bent pipes (663), and the top of the bent pipes (663) is connected to an annular spraying element (664).

8. The anti-crystallization heating and stirring treatment equipment for oleic acid raw materials according to claim 7, characterized in that: The top of the annular spray nozzle (664) is fixedly connected to the bottom of the top cover (4), and four sealing rods (665) are fixedly connected to the bottom of the annular piston plate (662). One end of the sealing rod (665) penetrates the storage shell (658) and extends to the outside of the storage shell (658).

9. The anti-crystallization heating and stirring treatment equipment for oleic acid raw materials according to claim 5, characterized in that: The outer wall of the fixed ring (6510) is provided with a lifting assembly (67). The lifting assembly (67) includes a bent rod (671) fixedly connected to one end of the outer wall of the fixed ring (6510). The top end of the bent rod (671) is fixedly connected to an annular frame plate (672). The outer wall of the annular frame plate (672) is fixedly connected to a sponge ring (673). The outer wall of the sponge ring (673) contacts the inner wall of the heating jacket (64).

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