A foreign body salvaging device in a prefabricated pipe pile hole

Abstract

The present invention discloses a device for salvaging foreign objects in the hole of a prefabricated pipe pile, which belongs to the field of construction. It includes a receiving part, a cavity is provided in the receiving part, a movable sleeve is movably provided in the receiving part, and a lifting part that can be retracted into the cavity is provided on the movable sleeve; a plurality of stirring parts and nozzles for cleaning soil are provided on the receiving part; the lifting part can be extended from the cavity and unfolded to catch the water and mud cleaned off the pipe wall; a first suction pipe is provided in the cavity, and the first suction pipe is connected to a suction source for extracting water and mud outwards; by adopting the method of water flushing and stirring of the stirring part, the blocked soil is acted on together, and the dispersed soil can be continuously discharged outwards for cleaning, which is easy to use, can clean the inner wall of the pipe pile, and can prevent the construction period and quality of the pouring from being affected by the uncleaned soil on the inner wall during the later pouring.

Description

Technical Field

[0001] The invention belongs to the field of building construction, and in particular relates to a foreign body salvaging device in a prefabricated pipe pile hole. Background Art

[0002] When constructing on a construction site, the first thing that needs to be constructed is the foundation. Generally, when constructing the foundation, pipe piles need to be inserted into the foundation. The insertion of pipe piles can not only transfer the weight of the building above to the lower soil layer with higher bearing capacity, thereby improving the stability of the building; it can also squeeze and compact the soft soil layer, thereby increasing the bearing capacity of the foundation. Pipe piles are generally prefabricated, and prestressed pipe piles are the most commonly used pipe piles.

[0003] After the pile is inserted into the ground, it is often necessary to recast the docking port at the pile mouth because it needs to be docked with the building above. Figure 1 As shown, the pouring interface is formed by inserting a steel cage, including a support plate a and steel bars d, into the pipe pile b, which is then poured with concrete, and the docking steel bars are exposed at the top of the pipe pile; generally, when pouring the interface, the steel cage is first inserted into the pipe pile d, and then pouring is carried out; before pouring, since the pipe pile is hollow in the middle, the end of the pipe pile is often blocked by a large amount of mud due to transportation, construction, etc., so it is necessary to dig it out before the steel cage can be put in, and then pouring is carried out. However, the mine salvage equipment commonly used in engineering projects, such as those in the form of digging, digging and grabbing, is basically difficult to use on pipe piles. First, this type of salvage equipment is bulky, and the pipe pile mouth is small and deep, which is inconvenient to use on pipe piles; second, this type of equipment can only dig out the mud during salvage, and cannot clean the inner wall of the pipe pile. The uncleaned mud can easily affect the quality during pouring, so a salvage device dedicated to salvaging mud and other foreign matter in the pipe pile is needed. Summary of the Invention

[0004] The purpose of the present invention is to address the above problems and provide a foreign body salvaging device for prefabricated pipe pile holes, which is easy to extend into the pipe pile and uses water flushing and scraping with a stirring member to clean the soil and the pipe pile wall, thereby improving the cleaning effect.

[0005] To achieve the above objectives, the present invention adopts a technical solution: a foreign body salvaging device in a prefabricated pipe pile hole, comprising a receiving member, wherein the receiving member is provided with a cavity, a movable sleeve is movably provided in the receiving member, and a lifting member is provided at one end of the movable sleeve that can be retracted into the cavity; the receiving member is provided with a plurality of stirring members and nozzles for cleaning mud;

[0006] The lifting member can extend from the cavity to expand and catch the water and mud cleaned off the wall of the pipe pile;

[0007] A first suction pipe is provided in the cavity, and a suction source for drawing water and mud outwards is connected to the first suction pipe.

[0008] As a further improvement of the above technical solution, the lifting member includes a plurality of support rods hingedly connected to the movable sleeve, and a flexible support portion fixed to the movable sleeve is provided between the support rods;

[0009] A stretching ring located at the edge of the flexible support portion is fixedly arranged between the support rods.

[0010] As a further improvement of the above technical solution, a support platform is fixedly provided on the top of the storage member, a receiving cavity is provided in the support platform, and the receiving cavity is connected to a water source.

[0011] As a further improvement of the above technical solution, a slide that slides with the storage part is fixed on the top of the movable sleeve, a plurality of through holes are provided on the slide, and a first baffle that allows the sucked soil to flow in one direction is provided on the top of the slide.

[0012] As a further improvement of the above technical solution, a piston plate is fixedly provided on the movable sleeve, and the piston plate can seal the cavity when the movable sleeve is retracted upward into the cavity;

[0013] A second suction pipe that passes through the slide upward is fixedly provided in the movable sleeve, and a sleeve that is sleeved on the outside of the second suction pipe is fixedly provided on the top wall of the cavity. The sleeve and the second suction pipe are respectively provided with water outlets that can be communicated with each other. The sucked water flows upward through the second suction pipe and enters the cavity through the water outlet.

[0014] As a further improvement of the above technical solution, a collecting cover is provided in the movable sleeve, and a second baffle is provided between the collecting cover and the inner cavity wall of the movable sleeve to allow the sucked mud to flow in one direction only.

[0015] As a further improvement to the above technical solution, the stirring member and the support platform are arranged to rotate relative to each other;

[0016] The stirring member includes a first stirring rod, a second stirring rod is hingedly provided at an end portion of the first stirring rod, and a third stirring rod is hingedly provided at an end portion of the second stirring rod.

[0017] As a further improvement of the above technical solution, a lifting rod is provided above the storage member to drive it to move up and down, and a lifting assembly is provided on the outer side of the lifting rod, and the mobile platform is provided with a lifting assembly to drive the lifting rod to move up and down;

[0018] A movable rod is movably provided in the lifting rod to control the movable sleeve to move up and down in the cavity.

[0019] As a further improvement of the above technical solution, a first suction pump connected to the nozzle is fixedly provided on the mobile platform, and a second suction pump for sucking out the sprayed water is also fixedly provided on the mobile platform;

[0020] The stirring member is also connected to a driving source arranged on the moving platform.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention provides a device for salvaging foreign matter in the hole of a prefabricated pipe pile. By adopting the methods of water flushing and stirring by a stirring member, the device can jointly act on the blocked soil, and the dispersed soil can be continuously discharged outward for cleaning. It is easy to use and can clean the inner wall of the pipe pile. When pouring in the later stage, it can prevent the construction period and quality from being affected by the uncleaned soil on the inner wall.

[0023] 2. Treat the pipe pile wall by flushing with water, which can reduce the impact on the inner wall of the pipe pile while ensuring the cleaning quality. When cleaning, the pipe pile can be temporarily sealed by unfolding the lifting piece to reduce the falling of water and soil and facilitate discharge.

[0024] 3. Two suction and discharge routes are set up, which can facilitate the upward discharge of water and soil when dredging the pipe piles, and can also facilitate the outward discharge of water and soil when cleaning the pipe pile walls. The two routes do not interfere with each other and can collect large particles of soil to prevent damage to the second suction pump after large particles of soil are sucked in during the suction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a pipe pile docking interface in the background art of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 3 Schematic diagram of the working state of the lifting member when it is stored in the cavity in the present invention

[0028] Figure 4 Schematic diagram of the internal cross-sectional structure of the movable sleeve;

[0029] Figure 5 for Figure 2 Schematic diagram of the local enlarged structure at A in the middle;

[0030] Figure 6 for Figure 2 Schematic diagram of the local enlarged structure at B in the middle;

[0031] Figure 7 for Figure 2Schematic diagram of the local enlarged structure at C in the middle;

[0032] Figure 8 for Figure 3 Schematic diagram of the local enlarged structure at D in the middle;

[0033] Figure 9 for Figure 5 Schematic cross-sectional view in the EE direction;

[0034] Figure 10 for Figure 5 Schematic diagram of the local enlarged structure at F in the middle;

[0035] Figure 11 Schematic diagram of the cross-sectional structure of the support platform;

[0036] Figure 12 It is a structural diagram of the lifting piece.

[0037] The text labels in the figure are as follows: 10. storage part; 11. cavity; 12. movable sleeve; 121. slide; 122. through hole; 123. first baffle; 124. piston plate; 13. lifting part; 131. support rod; 132. flexible support part; 133. stretching ring; 14. stirring part; 141. first stirring rod; 142. second stirring rod; 143. third stirring rod; 15. first suction pipe; 16. sleeve; 17. second suction pipe; 18. collecting cover; 19. second baffle; 20. support platform; 201. accommodating chamber; 21. lifting rod; 22. movable rod; 23. moving platform; 24. first suction pump; 25. second suction pump; 26. vertical platform; 27. rotating sleeve; a. support plate; b. pipe pile; c. steel bar; d. concrete. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0039] As the instruction manual Figure 1-11As shown, as a specific embodiment of the present invention, a foreign body salvage device in a prefabricated pipe pile hole includes a receiving part 10, wherein a cavity 11 is provided in the receiving part 10. In this embodiment, the receiving part 10 is a cylindrical structure with an opening downward, and also includes a movable platform 23. The movable platform 23 is located above the receiving part 10 and mainly supports the receiving part 10. The movable platform 23 is provided with wheels and a pusher for pushing the movable platform 23 to walk. A movable supporting foot that supports the stable movement of the movable platform 23 is provided on the bottom surface of the movable platform 23. A vertical platform 26 is fixedly provided on the mobile platform 23, and the vertical platform 26 mainly supports the lifting rod 21. A supporting cross arm for supporting the lifting rod 21 is provided on the vertical platform 26. A rotating sleeve 27 is fixedly provided on the cross arm. The lifting rod 21 is movably arranged in the rotating sleeve 27. The lifting rod 21 extends downward and is fixedly arranged between the receiving part 10. The lifting rod 21 is located in the middle position of the movable platform 23.

[0040] The mobile platform 23 is provided with a lifting assembly that drives the lifting rod 21 to move up and down. In this embodiment, the lifting assembly includes a gear rotatably arranged on the horizontal arm of the vertical platform 26. One end of the rotating shaft of the gear is connected to the handle. A rack that meshes with the gear is provided on the lifting rod 21. When the handle is rotated, the lifting rod 21 can be driven to move in the up and down directions, so that the storage part 10 can be controlled to move in the up and down directions, thereby realizing the up and down propulsion when removing soil.

[0041] Please refer to the instruction manual Figure 5 As shown, the storage member 10 is provided with a movable sleeve 12, the top of the movable sleeve 12 is connected to a movable rod 22, the movable rod 22 is movably provided in the lifting rod 21, and a motor is provided on the top of the lifting rod 21. The output shaft of the motor and the movable rod 22 are connected to each other in a threaded manner (see the attached manual for details). Figure 7 When the motor is started, it can drive the movable rod 22 to move up and down within the lifting rod 21, thereby driving the movable sleeve 12 to move up and down within the cavity 11. The movable sleeve 12 is provided with a lifting member 13 that can be retracted into the cavity 11; specifically, it is provided at the lower end of 12. By controlling the up and down movement of the movable sleeve 12, the lifting member 13 can be extended downward and deployed. After the lifting member 13 is deployed, it can catch the fallen soil when cleaning the inner wall of the pile, thereby reducing the amount of soil that falls into the pile and facilitating its discharge to the outside;

[0042] A support platform 20 is fixedly provided on the top of the storage member 10, and a lifting rod 21 passes through the support platform 20 and the storage member 10 and is fixed to each other. A receiving chamber 201 is provided in the support platform 20, and water is stored in the receiving chamber 201. The receiving chamber 201 is connected to a water source. A plurality of stirring members 14 and nozzles for cleaning soil are provided on the storage member 10, wherein the stirring member 14 and the support platform 20 are rotatably arranged with each other, and the stirring member 14 is further connected to a driving source provided on the mobile platform 23. When the stirring member 14 rotates, the soil blocked in the pipe pile is stirred to loosen the soil and facilitate discharge outward;

[0043] The nozzles are specifically provided on the side of the support platform 20 and at the bottom of the storage member 10. Specifically, a first suction pump 24 is fixedly provided on the mobile platform 23 and is interconnected with the nozzles. When the first suction pump 24 is started, the water sprayed from the nozzles provided on the support platform 20 can be sprayed all around to clean the inner wall of the pipe pile. The nozzles at the bottom spray water to the bottom, and can impact the soil before the soil is dredged, so as to disperse the soil in the pipe pile and facilitate downward penetration.

[0044] The lifting member 13 can extend from the cavity 11 and expand to catch the water and mud cleaned from the pipe wall. Specifically, after the mud blocking the entire pipe pile is cleared, the receiving member 10 can be extended to below the depth of the docking port to be poured, and then the lifting member 13 can be expanded to clean the pipe pile wall. The cleaned mud and water can be caught by the lifting member 13 for easy discharge.

[0045] A first suction pipe 15 is provided in the cavity 11, and a suction source for extracting water and mud is connected to the first suction pipe 15. Specifically, the suction source is a second suction pump 25 fixedly provided on the mobile platform 23 for sucking out the injected water and mud.

[0046] As the instruction manual Figure 1As shown, it is further optimized on the basis of the above embodiment: the lifting member 13 includes a plurality of support rods 131 hingedly arranged between the movable sleeve 12, and a flexible support part 132 fixed to the movable sleeve 12 is arranged between the support rods 131. In this embodiment, the flexible support part 132 is made of rubber, which can be contracted and expanded, and has a certain strength. A stretching ring 133 is fixedly arranged between the support rods 131 and is located at the edge of the flexible support part 132. The stretching ring 133 is also made of rubber. After the support rods 131 are expanded, the flexible support part 132 can be spread out to the maximum area, thereby temporarily closing the pipe pile hole. The stretching ring 133 plays a role in sealing the edge, which can lift water and soil, facilitate the collection of water and soil, and after overflowing the bottom of the storage part 10, sucked out. A pull rope is also provided between the movable sleeve 12 and the lifting member 13 to improve the supporting strength of the lifting member 13.

[0047] As the instruction manual Figure 4 、 5 As shown, it is further optimized on the basis of the above embodiment: a plurality of through holes 122 are provided on the slide 121, and a first baffle 123 is provided on the top of the slide 121 so that only the sucked soil can flow in one direction. The first baffle 123 is a filter screen plate used. One end of the first baffle 123 is connected to the top wall of the slide 121 in a hinged manner. When the second suction pump 25 starts to suck outward, water and soil smoothly pass through the through holes 122 into the cavity 11. A filter screen is provided on the first suction pipe 15 to isolate large particles of soil. Soil is sucked into the second suction pump 25 to prevent it from being damaged; when the second suction pump 25 stops working, the first baffle 123 automatically closes the through hole 122 due to its own weight, and water can flow downward from the through hole 122, but the large particles of soil that enter the cavity 11 are retained in the cavity 11, playing the role of collection and storage, and finally taken out from the pipe pile and manually cleaned and discharged. In this way, when cleaning the pipe pile wall, the washed soil and water can be easily discharged to the outside, and the pump can be protected;

[0048] The movable sleeve 12 is fixedly provided with a piston plate 124, and the piston plate 124 can seal the cavity 11 when the movable sleeve 12 is retracted upward into the cavity 11, thereby preventing water and mud from entering the cavity 11; a second suction pipe 17 is fixedly provided in the movable sleeve 12, which passes through the slide 121 upward, and the top of the second suction pipe 17 and the movable rod 22 are fixed to each other, and a sleeve 16 is fixedly provided on the top wall of the cavity 11, which is sleeved on the outside of the second suction pipe 17, and the sleeve 16 and the second suction pipe 17 are provided with water outlets that can be communicated with each other. Specifically, water outlets are respectively provided on the sleeve 16 and the second suction pipe 17. When When the movable sleeve 12 moves upward, the water outlets between the second suction pipe 17 and the sleeve 16 are connected to each other, and the piston plate 124 closes the cavity 11, which can change the water suction position so that the sucked water and mud flow upward from the second suction pipe 17 into the cavity 11. In this way, when the mud in the pile has not been completely dredged, the second suction pump 25 sucks the mud that is above the blocked mud and then can pump water and mud outward. Because the mud in the pile has not been completely dredged, the lifting member 13 is still collected in the cavity 11 and has not been deployed outward. The lifting member 13 will be deployed to work only after the mud is completely dredged.

[0049] A collecting hood 18 is fixedly provided in the movable sleeve 12. The collecting hood 18 is specifically arranged at the center position of the movable sleeve 12. A second baffle 19 that allows mud to flow in only one direction is provided between the collecting hood 18 and the inner cavity wall of the movable sleeve 12. The second baffle 19 is also provided with the same filter screen plate as the first baffle 123, and is mainly used to prevent the backflow of mud. After the second suction pump 25 stops working, the sucked mud enters the collecting hood 18 for collection and is finally removed manually.

[0050] As the instruction manual Figure 5 、 6As shown, it is further optimized on the basis of the above embodiment: the driving source for driving the stirring member 14 to rotate is a motor arranged on the horizontal arm of the vertical platform 26. Specifically, a driving shaft arranged in a vertical direction is rotatably set on the horizontal arm of the vertical platform 26. The driving shaft and the motor are arranged to rotate downward between the driving shaft and the support platform 20. A gear is fixed at the lower end of the driving shaft. The part that rotates between the stirring member 14 and the support platform 20 is provided with an internal gear ring that meshes with the gear. In this way, the stirring member 14 can be driven to rotate and clean the soil by starting the motor. Part 14 includes a first stirring rod 141, and the downward length of the first stirring rod 141 exceeds the bottom of the storage part 10. This ensures that after the movable sleeve 12 is completely received in the cavity 11, the first stirring rod 141 can first contact the soil and then break up the soil. The end of the first stirring rod 141 is hingedly provided with a second stirring rod 142, and the end of the second stirring rod 142 is hingedly provided with a third stirring rod 143. The second stirring rod 142 and the third stirring rod 143 are extensions of the first stirring rod 141, which can facilitate the cleaning of the pipe pile wall.

[0051] The specific usage of the present invention is as follows: first, when dredging downward, the motor connected to the stirring member 14 is started, so that the motor drives the stirring member 14 to rotate, and the first suction pump 24 is controlled to start. The first suction pump 24 draws water into the accommodating chamber 201 and sprays it out through the nozzles on the side of the support platform 20 and the bottom of the receiving member 10. Under the impact of the sprayed water and the stirring impact of the stirring member 14, the mud blocking the pipe pile mouth is dispersed.

[0052] Then the second suction pump 25 is started, the movable sleeve 12 is now contracted in the cavity 11, and the dispersed soil and water enter the cavity 11 through the second suction pipe 17 and are discharged outward through the second suction pump 25. By controlling the lifting assembly connected to the lifting rod 21, the lifting rod 21 is moved downward, and the soil blocking the pile opening can be gradually cleared downward.

[0053] When the receiving member 10 moves downward and the soil blocking the pile opening is completely cleared, the receiving member 10 is controlled to move to a height below the depth required for concrete pouring, and the motor connected to the movable rod 22 is controlled to start. The motor drives the movable rod 22 to move downward, causing the movable sleeve 12 to extend from the cavity 11. Then, under the elastic action of the flexible support portion 132 and the stretching ring 133, the movable sleeve 12 is expanded to the surrounding area, temporarily closing the pile hole, so that the water outlets between the sleeve 16 and the second suction pipe 17 are disconnected from each other, and the piston plate 124 extends from the cavity 11.

[0054] Then, by continuing to add water to the accommodating chamber 201, the water sprayed from the nozzle on the support platform 20 will clean the dirt adhered to the wall of the pipe pile. Under the action of the rotation of the second stirring rod 142 and the third stirring rod 143, the dirt that is difficult to clean around can be scraped off. The scraped water and dirt fall onto the flexible support part 132, which can prevent the water and dirt from falling into the pipe pile. Then, the second suction pump 25 is controlled to start, allowing the water and dirt to enter the cavity 11 through the through hole 122.

[0055] By continuously cleaning and pumping out water and mud to the outside, the pipe pile wall is cleaned from bottom to top. The height and position of the entire cleaning process are at the position of pouring concrete at the pipe pile mouth, which can facilitate subsequent concrete pouring. The mud falling into the pipe pile has little effect on the poured concrete.

[0056] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0057] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method of the present invention and its core ideas. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A device for salvaging foreign matter in a prefabricated pipe pile hole, comprising a receiving member (10), characterized in that: A cavity (11) is provided in the receiving part (10), a movable sleeve (12) is movably provided in the receiving part (10), and a lifting part (13) is provided at one end of the movable sleeve (12) and can be retracted into the cavity (11); a plurality of stirring parts (14) and nozzles for cleaning mud are provided on the receiving part (10); The lifting member (13) can extend from the cavity (11) to expand and receive the water and mud cleaned off the wall of the pipe pile; A first suction pipe (15) is provided in the cavity (11), and a suction source for extracting water and mud outwards is connected to the first suction pipe (15); A slide (121) is fixedly provided on the top of the movable sleeve (12) and is slidable with the receiving member (10); a plurality of through holes (122) are provided on the slide (121); and a first baffle (123) is provided on the top of the slide (121) for allowing the sucked soil to flow in only one direction. A piston plate (124) is fixedly provided on the movable sleeve (12), and the piston plate (124) can seal the cavity (11) when the movable sleeve (12) is retracted upward into the cavity (11); A second suction pipe (17) passing through the slide (121) upward is fixedly provided in the movable sleeve (12), a sleeve (16) sleeved on the outside of the second suction pipe (17) is fixedly provided on the top wall of the cavity (11), and water outlets that can be communicated with each other are respectively provided on the sleeve (16) and the second suction pipe (17), and the sucked water flows upward through the second suction pipe (17) and enters the cavity (11) through the water outlet; A lifting rod (21) is provided above the storage member (10) to drive the lifting member to move up and down, a movable platform (23) is provided outside the lifting rod (21), and a lifting assembly is provided on the movable platform (23) to drive the lifting rod (21) to move up and down; A movable rod (22) is movably provided in the lifting rod (21) for controlling the movable sleeve (12) to move up and down in the cavity (11).

2. The foreign body salvaging device for prefabricated pipe pile holes according to claim 1, characterized in that: The lifting member (13) comprises a plurality of support rods (131) hingedly arranged between the movable sleeve (12), and a flexible support portion (132) fixed to the movable sleeve (12) is arranged between the support rods (131); A stretching ring (133) located at the edge of the flexible support portion (132) is fixedly arranged between the support rods (131).

3. The foreign body salvaging device for prefabricated pipe pile holes according to claim 1, characterized in that: A support platform (20) is fixedly provided on the top of the storage member (10), an accommodating cavity (201) is provided in the support platform (20), the accommodating cavity (201) is connected to a water source, and a nozzle is provided on the side of the support platform (20).

4. The foreign body salvaging device for prefabricated pipe pile holes according to claim 1, characterized in that: A collecting cover (18) is provided in the movable sleeve (12), and a second baffle (19) is provided between the collecting cover (18) and the inner cavity wall of the movable sleeve (12) so as to allow the sucked mud to flow in one direction only.

5. The foreign body salvaging device for prefabricated pipe pile holes according to claim 3, characterized in that: The stirring member (14) and the supporting platform (20) are arranged to rotate relative to each other; The stirring member (14) comprises a first stirring rod (141), a second stirring rod (142) is hingedly provided at the end of the first stirring rod (141), and a third stirring rod (143) is hingedly provided at the end of the second stirring rod (142).

6. The foreign body salvaging device for prefabricated pipe pile holes according to claim 1, characterized in that: A first suction pump (24) in communication with the nozzle is fixedly provided on the mobile platform (23), and a second suction pump (25) for sucking out the sprayed water is also fixedly provided on the mobile platform (23); The stirring member (14) is also connected to a driving source provided on the moving platform (23).

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