Automatic stirring and forming device for soft fish gelatin

Abstract

The utility model relates to the technical field of soft fish glue processing, and discloses an automatic stirring and forming device for soft fish glue, which comprises a base, an outer barrel is fixedly connected to the top of the base, an inner barrel is fixedly connected to the inside of the outer barrel, the bottom of the inner barrel adopts a conical design, a liquid storage layer is arranged between the outer barrel and the inner barrel, and the liquid storage layer is arranged in the inner barrel. A plurality of electric heating rods are fixedly connected to the exterior of the inner barrel at equal intervals, a stirring motor is fixedly connected to the bottom of the base, a stirring mechanism is arranged at the output end of the stirring motor, and an access cover plate is fixedly connected to the top of the base. The liquid storage layer between the outer barrel and the inner barrel and the electric heating rod are used for cooperative heating, local overheating or supercooling of raw materials is avoided, soft fish gelatin components are uniform, the conical design of the bottom of the inner barrel is beneficial to material rolling during stirring, the materials automatically flow to the discharging pipe during discharging, efficient heating greatly shortens the manufacturing time, and the production efficiency is improved. And meanwhile, the device can continuously and efficiently produce high-quality soft fish gelatin.

Description

Technical Field

[0001] This utility model relates to the field of fish glue processing technology, and in particular to an automatic mixing and molding device for fish glue. Background Technology

[0002] Fish glue, a viscous colloidal substance formed from processed fish glue, is used in the food industry as a thickener, stabilizer, and gelling agent to improve the texture and taste of food. It can be added to high-end desserts, meat products, and beverages. In the cosmetics field, fish glue, with its good moisturizing and film-forming properties, is added to skin care and makeup products to effectively improve product quality. From a medical perspective, it is also used in health products because it is rich in collagen. Its unique chemical properties make it an important raw material.

[0003] The existing equipment uses a single stirring blade for mixing. The motor drives the stirring blade to rotate inside the container holding the fish glue soft gelatin raw material to achieve mixing of the raw material. Although this method can avoid the accumulation of raw material to a certain extent and make the raw material initially mixed evenly, the structure of the stirring blade is relatively simple. During the mixing process, only the raw material near the blade can be moved to flow, while the raw material far from the blade flows slowly, resulting in low overall production efficiency. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an automatic mixing and molding device for fish glue soft gelatin, which aims to improve the problem of low overall production efficiency caused by the use of a single mixing blade in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an automatic mixing and molding device for fish glue soft gelatin, comprising a base, an outer barrel fixedly connected to the top of the base, an inner barrel fixedly connected to the inside of the outer barrel, the bottom of the inner barrel adopting a conical design, a liquid storage layer provided between the outer barrel and the inner barrel, multiple electric heating rods fixedly connected at equal intervals to the outside of the inner barrel, a stirring motor fixedly connected to the bottom of the base, a stirring mechanism provided at the output end of the stirring motor, a maintenance cover plate fixedly connected to the top of the base, a feeding cylinder fixedly connected to the top right side of the maintenance cover plate, and a discharge pipe connected to the bottom left side of the base.

[0006] As a further description of the above technical solution:

[0007] The stirring mechanism includes a stirring shaft, the bottom end of which is fixedly connected to the output end of a stirring motor. A stirring blade is fixedly connected to the middle of the outer side of the stirring shaft. Connecting rods are fixedly connected to the upper and lower middle parts of the front and rear sides of the stirring shaft. The front ends of the two front connecting rods and the rear ends of the two rear connecting rods are fixedly connected to barrel wall scrapers. The outer sides of the two barrel wall scrapers are attached to the inner side of the inner barrel. Residual material scrapers are fixedly connected to the lower middle parts of the left and right sides of the stirring shaft. The bottoms of the two residual material scrapers are attached to the bottom of the inner side of the inner barrel.

[0008] As a further description of the above technical solution:

[0009] A support plate is fixedly connected to the front side of the base, and a control console is fixedly connected to the top right side of the support plate. The control console is electrically connected to multiple electric heating rods and a stirring motor. A tachometer is fixedly connected to the top left side of the support plate, and the tachometer is electrically connected to the stirring motor.

[0010] As a further description of the above technical solution:

[0011] A water supply pipe is connected to the right side of the inner tub, and a connecting flange is connected to the right end of the water supply pipe.

[0012] As a further description of the above technical solution:

[0013] A solenoid valve is fixedly installed in the middle of the discharge pipe, and the solenoid valve is electrically connected to the control console.

[0014] As a further description of the above technical solution:

[0015] The top of the inside of the feeding cylinder is provided with a sealing cap, and a handle is fixedly connected to the top of the sealing cap. Two sealing rings are fixedly connected to the outside of the sealing cap, and the outside of the two sealing rings are both attached to the inside of the feeding cylinder.

[0016] As a further description of the above technical solution:

[0017] A vent valve is fixedly installed on the top left side of the inspection cover plate. The vent valve is a one-way structure.

[0018] As a further description of the above technical solution:

[0019] The inspection cover is perforated around its top perimeter by mounting bolts, and the ends of the mounting bolts are threaded at equal intervals to the top of the base.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the liquid storage layer between the outer and inner barrels and the electric heating rod work together to heat the material. At the same time, the stirring motor drives the stirring mechanism to operate, which avoids local overheating or overcooling of the raw materials and makes the fish glue soft glue composition uniform. The conical design at the bottom of the inner barrel facilitates the rolling of the material during stirring and the automatic flow to the discharge pipe during discharge. The efficient heating greatly shortens the production time and speeds up the production speed, while ensuring that the device continuously and efficiently produces high-quality fish glue soft glue.

[0022] 2. In this utility model, the stirring shaft is driven to rotate by the output end of the stirring motor, which in turn drives the stirring blades to rotate, pushing the raw materials in the inner barrel to form convection and tumbling. The rotational motion is then transmitted to the scraper on the barrel wall through the connecting rod, causing it to scrape off the raw materials along the inner wall of the barrel. At the same time, the scraper for residual material is driven by the stirring shaft to scrape up the residual material at the bottom of the inner barrel. This achieves thorough mixing of the fish glue and soft gelatin raw materials, avoids the accumulation of raw materials on the barrel wall and the residue in the bottom corners, eliminates stirring dead corners, ensures full utilization of raw materials, greatly improves the uniformity of the fish glue and soft gelatin composition, and ensures stable final product quality. Attached Figure Description

[0023] Figure 1 This is a perspective view of the automatic mixing and molding device for fish glue soft gel proposed in this utility model;

[0024] Figure 2 This is a front view of the automatic mixing and molding device for fish glue soft gel proposed in this utility model;

[0025] Figure 3 This is a cross-sectional view of the outer barrel in the automatic mixing and molding device for fish glue soft gel proposed in this utility model.

[0026] Figure 4 This is a schematic diagram of the stirring mechanism in the automatic stirring and molding device for fish glue soft gel proposed in this utility model;

[0027] Figure 5 This is a structural exploded view of the sealing cap in the automatic mixing and molding device for fish glue soft gel proposed in this utility model.

[0028] Legend:

[0029] 1. Base; 2. Stirring mechanism; 201. Stirring shaft; 202. Stirring blade; 203. Connecting rod; 204. Tank wall scraper; 205. Residual material scraper; 3. Outer tank; 4. Inner tank; 5. Liquid storage layer; 6. Electric heating rod; 7. Stirring motor; 8. Inspection cover plate; 9. Feeding cylinder; 10. Discharge pipe; 11. Support plate; 12. Control console; 13. Tachometer; 14. Water supply pipe; 15. Connecting flange; 16. Solenoid valve; 17. Sealing cover; 18. Handle; 19. Sealing ring; 20. Vent valve; 21. Mounting bolts. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of this utility model provides an automatic mixing and molding device for fish glue soft gelatin, including a base 1, an outer barrel 3 fixedly connected to the top of the base 1, an inner barrel 4 fixedly connected to the inside of the outer barrel 3, the bottom of the inner barrel 4 adopts a conical design, a liquid storage layer 5 is provided between the outer barrel 3 and the inner barrel 4, multiple electric heating rods 6 are fixedly connected at equal intervals to the outside of the inner barrel 4, a stirring motor 7 is fixedly connected to the bottom of the base 1, a stirring mechanism 2 is provided at the output end of the stirring motor 7, a maintenance cover plate 8 is fixedly connected to the top of the base 1, a feeding cylinder 9 is fixedly connected to the top right side of the maintenance cover plate 8, and a discharge pipe 10 is connected to the bottom left side of the base 1.

[0032] Specifically, various raw materials for making fish glue are added to the inner barrel 4 through the feeding cylinder 9 located on the top right side of the inspection cover plate 8. The inner barrel 4 is firmly fixed inside the outer barrel 3. After the raw materials are added, the device enters the heating stage. At this time, the electric heating rod 6 in the liquid storage layer 5 between the outer barrel 3 and the inner barrel 4 is energized and heats up rapidly. The heat is transferred to the inside through the barrel wall of the inner barrel 4, directly heating the raw materials. At the same time, the liquid with good thermal conductivity filled in the liquid storage layer 5 will evenly distribute the heat generated by the electric heating rod 6, helping the raw materials in the inner barrel 4 to be heated evenly, effectively avoiding local overheating or overcooling, and greatly promoting the full fusion and molding of the various components of the fish glue. As the heating process progresses, the stirring motor 7 starts, and the stirring mechanism 2 connected to its output end also rotates. During the rotation of the stirring mechanism 2... The heated raw materials in the inner barrel 4 are thoroughly stirred. Due to the conical structure at the bottom of the inner barrel 4, the material rolls continuously along the slope of the bottom of the cone during stirring, which makes the stirring effect more excellent and the components of the fish glue soft gelatin are more evenly distributed. After sufficient heating and stirring, the fish glue soft gelatin is produced and the device enters the discharge stage. The discharge pipe 10 connected to the bottom left of the device allows the fish glue soft gelatin to flow naturally and smoothly to the discharge pipe 10 under the action of gravity, completing the discharge process conveniently and efficiently. The inspection cover plate 8 fixedly connected to the top of the device provides great convenience for the daily maintenance and repair of the equipment. The staff can open the inspection cover plate 8 to inspect and repair the internal components, thereby ensuring that the equipment is always in good operating condition. Throughout the process, efficient heating greatly shortens the production time and speeds up the production speed.

[0033] Reference Figure 3 and Figure 4 The stirring mechanism 2 includes a stirring shaft 201. The bottom end of the stirring shaft 201 is fixedly connected to the output end of the stirring motor 7. A stirring blade 202 is fixedly connected to the middle of the outer side of the stirring shaft 201. Connecting rods 203 are fixedly connected to the upper and lower middle parts of the front and rear sides of the stirring shaft 201. The front ends of the two front connecting rods 203 and the rear ends of the two rear connecting rods 203 are fixedly connected to the barrel wall scrapers 204. The outer sides of the two barrel wall scrapers 204 are attached to the inner side of the inner barrel 4. The lower middle parts of the left and right sides of the stirring shaft 201 are fixedly connected to the residual material scrapers 205. The bottoms of the two residual material scrapers 205 are attached to the bottom of the inner side of the inner barrel 4.

[0034] Specifically, after the stirring motor 7 is turned on, the power output from the motor is quickly transmitted to the stirring shaft 201, causing it to start rotating. The stirring blade 202, located in the middle of the outer side of the stirring shaft 201, immediately follows the rotation of the stirring shaft 201. The stirring blade 202 can exert a strong thrust on the raw materials in the inner barrel 4 during the rotation process. Under the continuous action of the stirring blade 202, the raw materials form a violent convection and tumbling in the inner barrel 4, which promotes the initial mixing of the fish glue. Connecting rods 203 are firmly fixed to the upper and lower middle parts of the front and rear sides of the stirring shaft 201 to connect to the barrel wall scrapers 204, accurately transmitting the rotational motion of the stirring shaft 201 to the barrel wall scrapers 204. The front ends of the two connecting rods 203 and the rear ends of the two connecting rods 203 are firmly connected to the barrel wall scrapers 204 respectively. The outer sides of the two barrel wall scrapers 204 are tightly attached to the inner wall of the inner barrel 4. As the stirring shaft 201 continues to rotate, the connecting rods 203 drive the... The barrel wall scraper 204 moves in a circular motion along the inner wall of the inner barrel 4. During the movement, the barrel wall scraper 204 can scrape off the raw materials adhering to the inner wall of the inner barrel 4, effectively preventing the raw materials from accumulating on the barrel wall and eliminating the occurrence of dead corners in the mixing process. This ensures that all raw materials in the inner barrel 4 can fully participate in the mixing process, greatly improving the uniformity and thoroughness of the mixing. On the lower left and right sides of the mixing shaft 201, there are also fixed scraper 205s for residual materials. The bottom of the two scraper 205s is in close contact with the bottom of the inner barrel 4. Since the bottom of the inner barrel 4 adopts a conical design, some raw materials tend to accumulate in the bottom corners during the mixing process. The scraper 205s, along with the rotation of the mixing shaft 201, can scrape up and push the residual materials accumulated at the bottom of the inner barrel 4, allowing them to be reintegrated into the overall mixing cycle. This not only achieves full utilization of raw materials and avoids waste, but also effectively ensures that the final produced fish glue soft glue has stable and reliable quality and uniform composition without deviation.

[0035] Reference Figure 1 , Figure 2 and Figure 5A support plate 11 is fixedly connected to the front side of the base 1. A control console 12 is fixedly connected to the top right side of the support plate 11. The control console 12 is electrically connected to multiple electric heating rods 6 and a stirring motor 7. A tachometer 13 is fixedly connected to the top left side of the support plate 11. The tachometer 13 is electrically connected to the stirring motor 7. A water supply pipe 14 is connected to the right side of the inner tank 4. A connecting flange 15 is connected to the right end of the water supply pipe 14. A solenoid valve 16 is fixedly installed in the middle of the discharge pipe 10. The solenoid valve 16 is electrically connected to the control console 12. The feeding cylinder 9 has a sealing cover 17 at its inner top, a handle 18 is fixedly connected to the top of the sealing cover 17, and two sealing rings 19 are fixedly connected to the outside of the sealing cover 17. The outside of the two sealing rings 19 are both attached to the inside of the feeding cylinder 9. A vent valve 20 is fixedly installed on the top left side of the inspection cover plate 8. The vent valve 20 is a one-way structure. Mounting bolts 21 are passed through the top of the inspection cover plate 8. The ends of the multiple mounting bolts 21 are threaded at equal intervals to the top of the base 1.

[0036] Specifically, the control console 12, located on the top right side of the front support plate 11 of the base 1, is electrically connected to multiple electric heating rods 6 and a stirring motor 7. The control console 12 allows for precise control of the heating power of the electric heating rods 6 and the start, stop, and speed of the stirring motor 7. During the heating stage, appropriate heating parameters are set on the control console 12 according to the temperature requirements of the fish glue production process. The electric heating rods 6 then turn on and heat up according to the instructions, precisely heating the raw materials. Simultaneously, the control console 12 allows for flexible adjustment of the speed of the stirring motor 7 to accommodate different sizes and densities. For raw material mixing, a tachometer 13 fixedly connected to the top left side of the support plate 11 is electrically connected to the stirring motor 7, providing real-time feedback on the stirring motor 7's speed. The control console 12 allows for fine-tuning of the stirring motor 7's speed, ensuring efficient and stable mixing. The water supply pipe 14 connected to the right side of the inner tank 4 can be easily connected to an external water source via a connecting flange 15. This facilitates connection to water supply pipes of different specifications, improving the equipment's versatility. During the discharge process, a solenoid valve 16 fixedly installed in the middle of the discharge pipe 10 is electrically connected to the control console 12. The system is connected to the control panel 12. Upon receiving the signal, the solenoid valve 16 opens, allowing the fish maw to flow smoothly out through the discharge pipe 10 under gravity. The sealing cap 17 at the top of the feeding cylinder 9 provides a good sealing environment for the addition of raw materials. The handle 18 at the top facilitates opening and closing the sealing cap 17. Two sealing rings 19, fixedly connected to the outside of the sealing cap 17, fit snugly against the inside of the feeding cylinder 9, effectively preventing raw material leakage and the entry of external impurities during the feeding process, ensuring the purity of the raw materials for fish maw production. The inspection cover 8... The vent valve 20, which is fixedly installed on the top left, is a one-way structure. If the air pressure inside the inner tank 4 is too high due to heating or other reasons, the vent valve 20 will automatically open to release the excess gas and prevent excessive internal pressure from causing safety hazards. The mounting bolts 21 that run around the top of the inspection cover 8 are threaded to the top of the base 1, ensuring the stability of the connection between the inspection cover 8 and the base 1. During normal operation of the equipment, this prevents the inspection cover 8 from loosening due to vibration, and also makes it easy for staff to disassemble and install the inspection cover 8 during maintenance.

[0037] Working Principle: The raw materials required for making fish glue are added to the inner barrel 4 through the feeding cylinder 9. The inner barrel 4 is fixed inside the outer barrel 3, and its bottom adopts a conical design. This design facilitates the smooth flow of materials during subsequent stirring and discharging processes. After the raw materials are added, the heating stage begins. The liquid storage layer 5 set between the outer barrel 3 and the inner barrel 4, as well as multiple electric heating rods 6 fixedly connected at equal intervals to the outside of the inner barrel 4, play a key role. After the electric heating rods 6 are powered on, they start to generate heat. The heat is transferred to the inside of the inner barrel 4 through the barrel wall, heating the raw materials. At the same time, the liquid storage layer 5 is filled with a liquid with good thermal conductivity, which plays a role in assisting uniform heat transfer, ensuring that the raw materials in the inner barrel 4 are heated more evenly, avoiding local overheating or undercooling, which is conducive to the full fusion and molding of the fish glue. Then, the stirring mechanism 2 set at the output end of the stirring motor 7 will move in sync with the electric motor. The machine starts and rotates. During the rotation, the stirring mechanism 2 stirs the raw materials in the inner barrel 4, fully mixing the heated raw materials. Due to the conical design at the bottom of the inner barrel 4, the material will roll along the slope of the bottom of the cone during the stirring process, making the stirring more thorough and the composition of the fish glue soft gel more even. After thorough heating and stirring, the fish glue soft gel is made and enters the discharge stage. The discharge pipe 10 connected to the bottom left of the base 1 is used to discharge the made fish glue soft gel. Due to the conical design at the bottom of the inner barrel 4, the fish glue soft gel will flow naturally to the discharge pipe 10 under the action of gravity, making the discharge process convenient and quick. The inspection cover plate 8 fixedly connected to the top of the base 1 provides convenience for the daily maintenance and repair of the equipment. The internal components can be inspected and repaired by opening the inspection cover plate 8 to ensure that the equipment is always in good operating condition.

[0038] Furthermore, when the stirring motor 7 starts, its output end drives the stirring shaft 201 to rotate. The stirring blades 202, located in the middle of the outer side of the stirring shaft 201, rotate under the drive of the stirring shaft 201. The shape and installation angle of the stirring blades 202 can powerfully push the raw materials in the inner barrel 4 during rotation, causing the raw materials to form strong convection and tumbling in the barrel. Through the continuous stirring of the stirring blades 202, the fish glue and soft glue can be initially mixed. Connecting rods 203 are fixedly connected to the upper and lower middle parts of the front and rear sides of the stirring shaft 201. These connecting rods 203 play a connecting and supporting role, transmitting the rotational motion of the stirring shaft 201 to the barrel wall scrapers 204. The front ends of the two front connecting rods 203 and the rear ends of the two rear connecting rods 203 are respectively fixedly connected to the barrel wall scrapers 204. The outer sides of the two barrel wall scrapers 204 are tightly attached to the inner side of the inner barrel 4. As the stirring shaft 201 rotates, the connecting rods 203... Rod 203 drives the barrel wall scraper 204 to move in a circular motion along the inner wall of the inner barrel 4. The barrel wall scraper 204 can scrape off the raw materials adhering to the inner wall of the inner barrel 4, preventing the raw materials from accumulating on the barrel wall and avoiding the formation of dead corners in the mixing process. This ensures that all the raw materials in the inner barrel 4 can participate in the mixing process, further improving the uniformity and thoroughness of the mixing. On the lower left and right sides of the mixing shaft 201, there are also scraper 205s for residual materials. The bottoms of the two scraper 205s are also attached to the bottom of the inner barrel 4. Since the bottom of the inner barrel 4 adopts a conical design, some raw materials will accumulate in the bottom corner during the mixing process. As the mixing shaft 201 rotates, the scraper 205 can scrape up and push the residual materials at the bottom of the inner barrel 4, so that they can re-participate in the overall mixing cycle. This not only ensures the full utilization of the raw materials and avoids waste, but also ensures that the final fish glue soft glue produced has stable quality and uniform composition.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic stirring and molding device for fish glue soft glue, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected with an outer barrel (3), the inside of the outer barrel (3) is fixedly connected with an inner barrel (4), the bottom of the inner barrel (4) is designed in a conical shape, a liquid storage layer (5) is arranged between the outer barrel (3) and the inner barrel (4), the outside of the inner barrel (4) is fixedly connected with a plurality of electric heating rods (6) at equal intervals, the bottom of the base (1) is fixedly connected with a stirring motor (7), the output end of the stirring motor (7) is provided with a stirring mechanism (2), the top of the base (1) is fixedly connected with an inspection cover plate (8), the top right side of the inspection cover plate (8) is fixedly connected with a feeding cylinder (9), and the bottom left side of the base (1) is communicated with a discharging pipe (10).

2. The automatic kneading and molding apparatus for fish glue soft glue according to claim 1, wherein: The stirring mechanism (2) comprises a stirring shaft (201), the bottom end of the stirring shaft (201) is fixedly connected with the output end of the stirring motor (7), the outside middle part of the stirring shaft (201) is fixedly connected with a stirring blade (202), the front and rear middle upper parts and the middle lower parts of the stirring shaft (201) are fixedly connected with connecting rods (203), the front ends of the front two connecting rods (203) and the rear ends of the rear two connecting rods (203) are fixedly connected with barrel wall scrapers (204), the outside of the two barrel wall scrapers (204) is attached to the inside of the inner barrel (4), and the left and right middle lower parts of the stirring shaft (201) are fixedly connected with excess material scrapers (205).

3. The automatic kneading and molding apparatus for fish glue soft glue according to claim 1, wherein: The front side of the base (1) is fixedly connected with a support plate (11), the top right side of the support plate (11) is fixedly connected with a control console (12), the control console (12) is electrically connected with the plurality of electric heating rods (6) and the stirring motor (7), the top left side of the support plate (11) is fixedly connected with a tachometer (13), and the tachometer (13) is electrically connected with the stirring motor (7).

4. The automatic kneading and molding apparatus for fish glue soft glue according to claim 1, wherein: The right side of the inner barrel (4) is communicated with a water supply pipe (14), and the right end of the water supply pipe (14) is communicated with a connecting flange (15).

5. The automatic kneading and molding apparatus for fish glue soft glue according to claim 1, wherein: The middle part of the discharging pipe (10) is fixedly installed with a solenoid valve (16), and the solenoid valve (16) is electrically connected with the control console (12).

6. The automatic kneading and molding apparatus for fish glue soft glue according to claim 1, wherein: The inside top end of the feeding cylinder (9) is provided with a sealing cover (17), the top of the sealing cover (17) is fixedly connected with a handle (18), the outside of the sealing cover (17) is fixedly connected with two sealing rings (19), and the outside of the two sealing rings (19) is attached to the inside of the feeding cylinder (9).

7. The automatic kneading and molding apparatus for fish glue soft glue according to claim 1, wherein: The top left side of the inspection cover plate (8) is fixedly installed with a deflation valve (20), and the deflation valve (20) is a one-way structure.

8. The automatic kneading and molding apparatus for fish glue soft glue according to claim 1, wherein: The top of the inspection cover plate (8) is penetrated by mounting bolts (21) around, and the ends of the mounting bolts (21) are threadedly connected to the top of the base (1) at equal intervals.

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