Defoaming device for biological fermentation

Abstract

The invention belongs to the technical field of biological fermentation, and particularly relates to a defoaming device for biological fermentation, which comprises a fixed seat mounted on a stirring shaft of a biological fermentation tank, a power connection mechanism is arranged at the upper end of the fixed seat, a sliding seat is arranged on the outer side of the fixed seat, and a connecting rod is mounted on the outer side of the sliding seat; the invention aims to solve the problems that the service life of a fermentation tank is affected due to the fact that the fermentation tank is damaged by pressure difference and vibration generated during use of an existing defoaming device, and the elimination efficiency of bubbles at the center position is low during defoaming. The fixed seat is mounted on the stirring shaft, the sliding seat is slidably mounted on the fixed seat, the sliding seat is connected with the moving seat through the connecting rod, the moving seat is driven to rotate when the stirring shaft of the fermentation tank rotates, the defoaming head is matched to absorb bubbles on the edge, and air is sprayed to the middle through the connecting rod and the sliding seat, so that the bubbles in the middle are blown to the edge; therefore, bubbles in the middle and at the edge can be conveniently and fully eliminated.

Description

Technical Field

[0001] The invention belongs to the technical field of biological fermentation, and in particular relates to a defoaming device used for biological fermentation. Background Art

[0002] There are several methods for defoaming during fermentation: manual stirring: use a spoon or a stirrer to stir continuously to gradually eliminate bubbles; funnel method: pour the fermentation liquid into a funnel and let it flow down naturally, and the bubbles will rise and escape along the funnel wall; separation method: pour the fermentation liquid into another container at an angle to separate gases such as oxygen and carbon dioxide, and then pour the liquid back to its original position; in-tank defoaming: mechanical vibration or pressure change is used in the fermentation tank to cause the foam to burst; out-of-tank defoaming: the foam is drawn out of the fermentation tank, accelerated by a nozzle or eliminated by centrifugal force, and then the liquid is returned to the fermentation tank; At present, mechanical defoaming methods usually use mechanical vibration or pressure change, suction, etc. The pressure difference and vibration generated during use will damage the fermentation tank, thereby affecting the service life of the fermentation tank. In addition, the efficiency of bubble elimination at the center position during defoaming is low. Therefore, it is necessary to design a defoaming device for biological fermentation to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a defoaming device for biological fermentation to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a defoaming device for biological fermentation, comprising a fixed seat installed on a stirring shaft of a biological fermentation tank, an upper end of the fixed seat is provided with a power connection mechanism, a sliding seat is provided on the outer side of the fixed seat, a connecting rod is installed on the outer side of the sliding seat, a moving seat is provided at one end of the connecting rod, a defoaming head is provided on one side of the moving seat, a guide seat is provided on the lower side of the moving seat, and a floating seat is provided on the lower side of the guide seat; The sliding seat comprises a sliding ring, an internal channel is arranged inside the sliding ring, one end of the connecting rod is communicated with the inside of the internal channel, an air blowing pipe is arranged at the lower side of the sliding ring, and the upper end of the air blowing pipe is communicated with the inside of the internal channel; The movable seat comprises a mounting seat, an air suction pump is arranged inside the mounting seat, one end of the air suction pump is connected to one end of the defoaming head, and the other end of the air suction pump is connected to one end of the connecting rod; The defoaming head includes a mounting tube mounted on a mounting seat, and the mounting tube is connected to one end of an air suction pump, an air suction pipe is arranged at one end of the mounting tube, a filter screen head is arranged at one end of the air suction pipe, and a bubble breaking needle is arranged on the inner wall of the air suction pipe.

[0005] Preferably, the fixed seat includes a fixed cylinder, the fixed cylinder is fixed on the stirring shaft of the fermentation tank, the surface of the fixed cylinder is provided with a guide groove, the inner wall of the sliding ring is provided with a sliding guide block, and the sliding ring is slidably installed on the fixed cylinder through the sliding guide block and the guide groove.

[0006] Preferably, the air blowing pipe is evenly installed on the lower surface of the sliding ring, the outlet at the lower end of the air blowing pipe is arranged to be inclined, and the inclination angle of the lower end of the air blowing pipe corresponds to the position of the guide seat.

[0007] Preferably, a rotating fan is rotatably mounted on the inner side of the mounting tube via a cross-shaped frame, and a bubble-breaking rotating frame is mounted on the rotating fan via a fixed shaft, and the fixed shaft is rotatably mounted in the mounting tube via the cross-shaped frame.

[0008] Preferably, a moving frame is provided at the lower side of the mounting seat, an auxiliary gear is provided at the inner side of the moving frame, an auxiliary rack is provided at the inner bottom of the guide seat, and the auxiliary gear is meshed on the auxiliary rack.

[0009] Preferably, a positioning frame is fixedly mounted on the outer side of the mounting seat, a sliding ball is provided at the lower end of the positioning frame, and the positioning frame is slidably mounted on the outer side of the guide seat through the sliding ball.

[0010] Preferably, the guide seat includes a guide plate, the sliding ball slides on the surface of the guide plate, a guide frame is provided on one side of the guide plate, the auxiliary rack is installed on the inner side of the guide frame, the shape of the guide frame is set to be an isosceles trapezoid, and connecting protrusions and connecting grooves are provided at both ends of the guide plate, and the connecting protrusions and connecting grooves are engaged with each other and fixed by screws.

[0011] Preferably, the floating seat includes a mounting frame, an airbag ring is arranged on the outer side of the mounting frame, a mounting protrusion is arranged on the surface of the mounting frame, a mounting groove is arranged on the inner side of the airbag ring, the airbag ring is engaged with the outer side of the mounting frame through the mounting protrusion and the mounting groove, the mounting frame includes a main frame body and a mounting head arranged at the upper end of the main frame body, and the mounting head is fixed on the lower side of the guide frame.

[0012] Preferably, the connecting rod comprises a main tube and a sliding rod slidably mounted on one end of the main tube, one end of the sliding rod is provided with a threaded seat, and the threaded seat is screwed into the main tube through a thread.

[0013] Preferably, the power connection mechanism includes a power connection tube installed inside the stirring shaft and a power connection wire installed in the power connection tube, the power connection wire passes through the interior of the connecting rod in a spiral shape, a brush is fixedly installed on the upper end of the power connection tube, a power connection ring is provided on the outer side of the brush, and the brush is electrically connected to one end of the power connection wire.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the designed fixed seat, sliding seat, connecting rod, mobile seat, defoaming head and guide seat, the fixed seat is installed on the stirring shaft when in use, the sliding seat is slidably installed on the fixed seat, the sliding seat is connected to the mobile seat through the connecting rod, and the mobile seat is driven to rotate when the stirring shaft of the fermentation tank rotates, and the defoaming head absorbs the bubbles on the edge, and the connecting rod and the sliding seat are used to spray the air to the middle, so as to blow the bubbles in the middle to the edge, so as to facilitate the full elimination of bubbles in the middle and the edges.

[0015] 2. Through the designed moving seat, the auxiliary gear and the auxiliary rack are engaged to move the guide when in use, and the positioning frame and the sliding ball slide on the outside of the guide seat to position, so that the moving seat drives the defoaming head to move along the guide seat more stably, thereby ensuring the defoaming effect.

[0016] 3. Through the designed floating seat and guide seat, the guide frame is installed through the guide piece when in use, and the curvature of the guide piece is bent as needed. The gap between the guide frames facilitates the guide frame to bend into a certain curvature following the guide piece, and the mounting frame of the floating seat is installed on the guide frame, which facilitates the airbag ring to be installed on the lower side of the guide seat through the mounting frame, thereby auxiliary support for the guide seat to be used on the liquid surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the installation structure of the sliding ring of the present invention; Figure 3 It is a schematic diagram of the structure of the defoaming head of the present invention; Figure 4 It is a schematic diagram of the structure of the moving seat and the guide seat of the present invention; Figure 5 It is a schematic diagram of the position of the mobile rack of the present invention; Figure 6 It is a schematic diagram of the guide seat structure of the present invention; Figure 7 It is a schematic diagram of the power connection mechanism of the present invention; Figure 8 It is a schematic diagram of the structure of the mounting frame of the present invention; Fig. 9 It is a schematic diagram of the connecting rod structure of the present invention; In the figure: 1, fixed seat; 11, fixed cylinder; 12, guide groove; 2, sliding seat; 21, sliding ring; 22, sliding guide block; 23, internal channel; 24, blowing pipe; 3, connecting rod; 31, main cylinder; 32, sliding rod; 33, threaded seat; 4, moving seat; 41, mounting seat; 42, suction pump; 43, positioning frame; 44, sliding ball; 45, moving frame; 46, auxiliary gear; 47, auxiliary rack; 5, defoaming head; 51, mounting pipe; 5 2. Intake pipe; 53. Bubble breaking needle; 54. Filter head; 55. Rotating fan; 56. Bubble breaking rotating frame; 6. Guide seat; 61. Guide plate; 62. Guide frame; 63. Connecting protrusion; 64. Connecting groove; 7. Floating seat; 71. Mounting frame; 711. Main frame; 712. Mounting head; 72. Airbag ring; 73. Mounting protrusion; 74. Mounting slot; 8. Power connection mechanism; 81. Brush; 82. Power connection ring; 83. Power connection pipe; 84. Power connection wire. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1 to 9 The present invention provides a technical solution: a defoaming device for biological fermentation, comprising a fixed seat 1 installed on the stirring shaft of the biological fermentation tank, an electric connection mechanism 8 is arranged at the upper end of the fixed seat 1, a sliding seat 2 is arranged on the outer side of the fixed seat 1, a connecting rod 3 is installed on the outer side of the sliding seat 2, a moving seat 4 is arranged at one end of the connecting rod 3, a defoaming head 5 is arranged on one side of the moving seat 4, a guide seat 6 is arranged on the lower side of the moving seat 4, and a floating seat 7 is arranged on the lower side of the guide seat 6; The fixed seat 1 includes a fixed cylinder 11, which is fixed on the stirring shaft of the fermentation tank. The surface of the fixed cylinder 11 is provided with a guide groove 12, and the inner wall of the sliding ring 21 is provided with a sliding guide block 22. The sliding ring 21 is slidably installed on the fixed cylinder 11 through the sliding guide block 22 and the guide groove 12. The sliding seat 2 includes a sliding ring 21, an internal channel 23 is arranged inside the sliding ring 21, one end of the connecting rod 3 is connected to the inside of the internal channel 23, and an air blowing pipe 24 is arranged on the lower side of the sliding ring 21, the upper end of the air blowing pipe 24 is connected to the inside of the internal channel 23, and the air blowing pipe 24 is evenly installed on the lower surface of the sliding ring 21, and the lower end outlet of the air blowing pipe 24 is arranged to be inclined, and the inclination angle of the lower end of the air blowing pipe 24 corresponds to the position of the guide seat 6, so that the air blowing pipe 24 is convenient to blow evenly to move the bubbles from the middle to the edge when in use; The movable seat 4 includes a mounting seat 41, and an air suction pump 42 is arranged inside the mounting seat 41. One end of the air suction pump 42 is connected to one end of the defoaming head 5, and the other end of the air suction pump 42 is connected to one end of the connecting rod 3. When in use, the air suction pump 42 is operated to evacuate air, so that the air bubbles are extracted and eliminated through the defoaming head 5, and the air extracted by the air suction pump 42 is passed to the sliding guide block 22 and the air blowing pipe 24 through the connecting rod 3, and is blown to the middle position through the air blowing pipe 24, so that the bubbles in the middle are eliminated or the bubbles are blown to the position of the edge air suction pipe 52; The defoaming head 5 includes a mounting tube 51 mounted on the mounting seat 41, and the mounting tube 51 is connected to one end of the suction pump 42, an suction pipe 52 is provided at one end of the mounting tube 51, a filter head 54 is provided at one end of the suction pipe 52, and a bubble breaking needle 53 is provided on the inner wall of the suction pipe 52. The suction pump 42 is operated to evacuate air, so that the bubbles are extracted and eliminated through the mounting tube 51 and the suction pipe 52. The defoaming effect is better through the cooperation of the filter head 54 and the bubble breaking needle 53. A rotating fan 55 is rotatably installed on the inner side of the mounting tube 51 through a M-shaped frame. The rotating fan 55 is installed with a bubble breaking rotating frame 56 through a fixed shaft, and the fixed shaft is rotatably installed in the mounting tube 51 through the M-shaped frame. When in use, the airflow drives the rotating fan 55 and the bubble breaking rotating frame 56 to rotate to further defoam.

[0020] For further information, see Figures 1 to 9 The connecting rod 3 includes a main cylinder 31 and a sliding rod 32 slidably installed at one end of the main cylinder 31. One end of the sliding rod 32 is provided with a threaded seat 33, and the threaded seat 33 is screwed into the main cylinder 31 through a thread. When in use, the position of the sliding rod 32 on the main cylinder 31 is adjusted by rotating the main cylinder 31, so that the two ends of the connecting rod 3 are conveniently connected to the movable seat 4 and the sliding seat 2; the power connection mechanism 8 includes a power connection tube 83 installed in the stirring shaft and a power connection wire 84 installed in the power connection tube 83. The power connection wire 84 passes through the interior of the connecting rod 3 in a spiral shape, so that the power connection wire 84 is stably installed on the inner side of the connecting rod 3 when the connecting rod 3 is extended or retracted. A brush 81 is fixedly installed on the upper end of the power connection tube 83, and a power connection ring 82 is provided on the outer side of the brush 81. The brush 81 is electrically connected to one end of the power connection wire 84. When in use, the brush 81 is fixed on the stirring shaft, and the power connection ring 82 is externally connected to the power supply and connected to the power connection wire 84 through the brush 81.

[0021] From the above description, it can be seen that the present invention has the following beneficial effects: when in use, the fixed seat 1 is installed on the stirring shaft, the sliding seat 2 is slidably installed on the fixed seat 1, and the sliding seat 2 is connected to the movable seat 4 through the connecting rod 3. When the stirring shaft of the fermentation tank rotates, the movable seat 4 is driven to rotate, and the defoaming head 5 absorbs the bubbles at the edge, and the connecting rod 3 and the sliding seat 2 are used to spray the middle part, so that the bubbles in the middle are blown to the edge, so as to facilitate the full elimination of the bubbles in the middle and the edges.

[0022] Example 2: Please refer to Figures 1 to 9As shown, on the basis of the first embodiment, the present invention provides a technical solution: a moving frame 45 is provided on the lower side of the mounting seat 41, an auxiliary gear 46 is provided on the inner side of the moving frame 45, an auxiliary rack 47 is provided on the inner bottom of the guide seat 6, the auxiliary gear 46 is meshed on the auxiliary rack 47, and the auxiliary gear 46 is engaged with the auxiliary rack 47, so that when the mounting seat 41 moves, the auxiliary gear 46 is driven to move and guide on the auxiliary rack 47; a positioning frame 43 is fixedly installed on the outer side of the mounting seat 41, and a sliding ball 44 is provided on the lower end of the positioning frame 43, and the positioning frame 43 is slidably installed on the outer side of the guide seat 6 through the sliding ball 44, and it is more convenient to be supported on the guide seat 6 by the positioning frame 43 and the sliding ball 44 when in use.

[0023] The movable seat 4 adopting the above technical solution is engaged with the auxiliary gear 46 and the auxiliary rack 47 to move and guide when in use, and cooperates with the positioning frame 43 and the sliding ball 44 to slide on the outer side of the guide seat 6 to be positioned, so that the movable seat 4 drives the defoaming head 5 to move along the guide seat 6 more stably, thereby ensuring the defoaming effect.

[0024] For further information, see Figures 1 to 9 The guide seat 6 includes a guide piece 61, and the sliding ball 44 slides on the surface of the guide piece 61. A guide frame 62 is provided on one side of the guide piece 61, and the auxiliary rack 47 is installed on the inner side of the guide frame 62. The shape of the guide frame 62 is set to be an isosceles trapezoid. Connecting protrusions 63 and connecting grooves 64 are provided at both ends of the guide piece 61. The connecting protrusions 63 and the connecting grooves 64 are mutually engaged and fixed by screws. The position is adjusted by bending the curvature of the guide piece 61. The connecting protrusions 63 and the connecting grooves 64 are engaged and fixed by screws, so that the guide pieces 61 are spliced ​​into a ring and installed in the tank, and the isosceles trapezoidal guide frame 62 is convenient to follow the guide piece 61 to be bent into multiple shapes. The floating seat 7 includes a mounting frame 71, an airbag ring 72 is arranged on the outer side of the mounting frame 71, a mounting protrusion 73 is arranged on the surface of the mounting frame 71, and a mounting groove 74 is arranged on the inner side of the airbag ring 72. The airbag ring 72 is engaged with the outer side of the mounting frame 71 through the mounting protrusion 73 and the mounting groove 74. The airbag ring 72 is installed through the mounting frame 71, so that it is convenient to float on the surface of the fermentation liquid through the airbag ring 72, so that it is convenient for the defoaming head 5 to eliminate bubbles on the liquid surface. The mounting frame 71 includes a main frame body 711 and a mounting head 712 arranged at the upper end of the main frame body 711. The mounting head 712 is fixed to the lower side of the guide frame 62, so that it is convenient and quick to install and fix when in use.

[0025] The floating seat 7 and the guide seat 6 of the above-mentioned technical solution are used to install the guide frame 62 through the guide piece 61 when in use. The curvature of the guide piece 61 is bent as needed, and the gap between the guide frames 62 facilitates the guide frame 62 to follow the guide piece 61 to bend into a certain curvature, and the mounting frame 71 of the floating seat 7 is installed on the guide frame 62, which facilitates the installation of the airbag ring 72 on the lower side of the guide seat 6 through the mounting frame 71, thereby auxiliary support The use of the guide seat 6 on the liquid surface.

[0026] The working principle and use process of the present invention are as follows: when in use, the position is adjusted by bending the curvature of the guide piece 61 according to the size of the fermentation tank, and the guide pieces 61 are spliced ​​into a ring and installed in the tank by engaging the connecting protrusions 63 and the connecting grooves 64 and fixing them with screws, and the isosceles trapezoidal guide frame 62 is convenient to follow the guide piece 61 to be bent into multiple sizes, and the air bag ring 72 is installed through the mounting frame 71, so that the air bag ring 72 is convenient to float on the fermentation liquid surface, so as to facilitate the defoaming head 5 to eliminate bubbles on the liquid surface, and the sliding ring 21 is convenient to follow the lifting movement through the guide groove 12 and the sliding guide block 22, and then it is slidably installed on the guide piece 61 and the guide frame 62 through the moving frame 45 and the positioning frame 43, and the position of the sliding rod 32 on the main cylinder 31 is adjusted by rotating the main cylinder 31, so as to facilitate the connection. The two ends of the rod 3 are connected to the movable seat 4 and the sliding seat 2, the brush 81 is fixed on the stirring shaft, the connecting ring 82 is connected to the external power supply and is connected to the connecting wire 84 through the brush 81. When in use, the suction pump 42 is operated to evacuate air, so that the bubbles are extracted and eliminated through the installation pipe 51 and the suction pipe 52. The defoaming effect is better through the cooperation of the filter head 54 and the bubble breaking needle 53, and the air flow drives the rotating fan 55 and the bubble breaking rotating frame 56 to rotate for further defoaming. The air extracted from the suction pump 42 is passed to the sliding guide block 22 and the blowing pipe 24 through the connecting rod 3, and is blown to the middle position through the blowing pipe 24, so as to eliminate the bubbles in the middle or blow the bubbles to the position of the edge suction pipe 52. When the stirring shaft rotates, the sliding seat 2, the connecting rod 3 and the movable seat 4 are driven to move, thereby driving the defoaming head 5 to move, so as to eliminate the bubbles evenly and quickly.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] The above description is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A defoaming device for biological fermentation, characterized in that: It comprises a fixed seat installed on the stirring shaft of the biological fermentation tank, an electric connection mechanism is arranged at the upper end of the fixed seat, a sliding seat is arranged on the outer side of the fixed seat, a connecting rod is arranged on the outer side of the sliding seat, a moving seat is arranged at one end of the connecting rod, a defoaming head is arranged on one side of the moving seat, a guide seat is arranged on the lower side of the moving seat, and a floating seat is arranged on the lower side of the guide seat; The sliding seat comprises a sliding ring, an internal channel is arranged inside the sliding ring, one end of the connecting rod is communicated with the inside of the internal channel, an air blowing pipe is arranged at the lower side of the sliding ring, and the upper end of the air blowing pipe is communicated with the inside of the internal channel; The fixed seat comprises a fixed cylinder, which is fixed on the stirring shaft of the fermentation tank, a guide groove is arranged on the surface of the fixed cylinder, a sliding guide block is arranged on the inner wall of the sliding ring, and the sliding ring is slidably mounted on the fixed cylinder through the sliding guide block and the guide groove; The movable seat comprises a mounting seat, an air suction pump is arranged inside the mounting seat, one end of the air suction pump is connected to one end of the defoaming head, and the other end of the air suction pump is connected to one end of the connecting rod, a movable frame is arranged on the lower side of the mounting seat, an auxiliary gear is arranged on the inner side of the movable frame, an auxiliary rack is arranged on the inner bottom of the guide seat, and the auxiliary gear is meshed on the auxiliary rack; The defoaming head includes a mounting tube mounted on a mounting seat, and the mounting tube is connected to one end of an air suction pump, an air suction pipe is arranged at one end of the mounting tube, a filter head is arranged at one end of the air suction pipe, and a bubble breaking needle is arranged on the inner wall of the air suction pipe; The guide seat comprises a guide piece, a guide frame is arranged on one side of the guide piece, and the auxiliary rack is arranged on the inner side of the guide frame; The floating seat comprises a mounting frame, an airbag ring is arranged on the outer side of the mounting frame, a mounting protrusion is arranged on the surface of the mounting frame, a mounting slot is arranged on the inner side of the airbag ring, and the airbag ring is clamped on the outer side of the mounting frame through the mounting protrusion and the mounting slot; The power connection mechanism includes a power connection pipe installed inside the stirring shaft and a power connection wire installed in the power connection pipe. The power connection wire passes through the interior of the connecting rod in a spiral shape. A brush is fixedly installed on the upper end of the power connection pipe. A power connection ring is provided on the outer side of the brush. The brush is electrically connected to one end of the power connection wire.

2. A defoaming device for biological fermentation according to claim 1, characterized in that: The air blowing pipe is evenly installed on the lower surface of the sliding ring, the lower end outlet of the air blowing pipe is arranged in an inclined shape, and the inclination angle of the lower end of the air blowing pipe corresponds to the position of the guide seat.

3. A defoaming device for biological fermentation according to claim 1, characterized in that: A rotating fan is rotatably mounted on the inner side of the mounting tube through a cross-shaped frame, a bubble-breaking rotating frame is mounted on the rotating fan through a fixed shaft, and the fixed shaft is rotatably mounted in the mounting tube through the cross-shaped frame.

4. A defoaming device for biological fermentation according to claim 1, characterized in that: A positioning frame is fixedly installed on the outer side of the mounting seat, a sliding ball is arranged on the lower end of the positioning frame, and the positioning frame is slidably installed on the outer side of the guide seat through the sliding ball.

5. A defoaming device for biological fermentation according to claim 4, characterized in that: The sliding ball slides on the surface of the guide piece, and the shape of the guide frame is set to be an isosceles trapezoid.

6. A defoaming device for biological fermentation according to claim 1, characterized in that: Both ends of the guide piece are provided with connecting protrusions and connecting grooves, and the connecting protrusions and connecting grooves are engaged with each other and fixed by screws.

7. A defoaming device for biological fermentation according to claim 1, characterized in that: The mounting frame comprises a main frame body and a mounting head arranged at the upper end of the main frame body, and the mounting head is fixed on the lower side of the guide frame.

8. A defoaming device for biological fermentation according to claim 1, characterized in that: The connecting rod comprises a main cylinder and a sliding rod slidably mounted on one end of the main cylinder.

9. A defoaming device for biological fermentation according to claim 8, characterized in that: One end of the sliding rod is provided with a threaded seat, and the threaded seat is screwed into the main cylinder through a thread.

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