Water dispenser

Abstract

The invention relates to the technical field of water dispensers, in particular to a water dispenser which comprises a multi-taste water dispenser body, and the multi-taste water dispenser body comprises a water source connector, a pressure reducing valve, a CO2 gas cylinder, a carbonic acid booster pump, a cold tank, a carbonic acid water tank, a compressor, an annular pipe for cooling the compressor and a carbonic acid water pump. The carbonated water tank is fixed to the upper side in the cold tank. The carbonated water pump is installed on the upper end face of the carbonated water tank and communicated with the interior of the carbonated water tank. The annular pipe for cooling the compressor is wound on the outer surface of the carbonated water tank and connected with the compressor, and the CO2 gas cylinder is connected to the lower end face of the pressure reducing valve; and besides cold water and hot water, carbonated water can be output, so that the taste diversity of the water dispenser is improved, and the market competitiveness of the water dispenser is improved.

Description

Technical Field

[0001] The invention relates to the technical field of water drinking machines, in particular to a water drinking machine. Background Art

[0002] A water dispenser is a device that heats or cools bottled pure water (or mineral water) for people to drink. Water dispensers can be divided into three types according to the water outlet temperature: warm type, hot and cold type, and hot and cold warm type. They will provide water of different temperatures for people to drink. The machine itself has functions such as cooling, heating and insulation.

[0003] Existing water dispensers are also divided into top-mounted water dispensers according to their styles: the bottled water is placed above the water dispenser, and the water flows into the water storage tank inside the machine body and then is heated or cooled. This type of water dispenser requires lifting the water bucket, but the storage space is relatively large; bottom-mounted water dispensers: the water is pumped from the water bucket below to the inner tank of the machine body for heating or cooling through a water suction pump, which saves the trouble of lifting the water bucket and is more beautiful; and tea bar machines: combining the functions of a water dispenser and an electric kettle, usually equipped with a kettle and a thermos pot, suitable for homes or offices that need to frequently make tea or hot water.

[0004] However, this water dispenser can only dispense hot water and cold water, its taste is relatively monotonous, its market competitiveness is low, and as the use time increases, some impurities will gradually adhere to the inner wall of the water tank inside the device, thereby affecting the water quality; therefore, it does not meet the existing needs, and we have proposed a water dispenser. Summary of the invention

[0005] The purpose of the present invention is to provide a water dispenser to solve the problems raised in the above background technology that the water dispenser can only dispense hot water and cold water, its taste is relatively monotonous, its market competitiveness is low, and as the use time increases, some impurities will gradually adhere to the inner wall of the water tank inside the equipment, thereby affecting the water quality.

[0006] To achieve the above object, the present invention provides the following technical solutions: a water dispenser, including a multi-flavor water dispenser, the multi-flavor water dispenser including a water source connection port, a pressure reducing valve, a CO 2 A gas cylinder, a carbonic acid booster pump, a cold tank, a carbonated water tank, a compressor, a compressor cooling annular tube and a carbonated water pump, wherein the water source connection port is communicated with the interior of the cold tank, the carbonated water tank is fixed to the upper side of the interior of the cold tank, and the carbonated water pump is installed on the upper end surface of the cold tank and communicated with the interior of the carbonated water tank;

[0007] The compressor cooling annular pipe is wound around the outer surface of the carbonated water tank and connected to the compressor;

[0008] The CO 2The gas cylinder is connected to the lower end surface of the pressure reducing valve, the pressure reducing valve is communicated with the interior of the carbonated water tank, and the carbonic acid booster pump is communicated with the interiors of the cold tank and the carbonated water tank at the same time.

[0009] Preferably, a telescopic water storage tank self-cleaning mechanism is fixedly installed on the lower side of the interior of the cold tank, and the telescopic water storage tank self-cleaning mechanism includes two first right-angle rods, two second right-angle rods, a synchronous movement mechanism and a rotation mechanism, the two first right-angle rods are respectively located on both sides of the interior of the carbonated water tank, the two second right-angle rods are respectively located on both sides of the interior of the cold tank, and the distance between the first right-angle rod and the inner wall of the carbonated water tank is the same as the distance between the second right-angle rod and the inner wall of the cold tank, the synchronous movement mechanism can synchronously drive the two first right-angle rods and the two second right-angle rods to move outward synchronously, and the rotation mechanism can drive the two first right-angle rods and the two second right-angle rods to revolve around the center point of the interior of the carbonated water tank;

[0010] The surfaces of the first right-angle rod and the second right-angle rod facing the inner walls of the carbonated water tank and the cold tank are both provided with a strip bristle fixing base, and the surfaces of the strip bristle fixing base located inside the carbonated water tank facing the inner wall of the carbonated water tank and the surfaces of the strip bristle fixing base located inside the cold tank facing the inner wall of the cold tank are both provided with bristles.

[0011] Preferably, the multi-flavor water dispenser also includes a condenser fan assembly, a preheating tank is provided behind the condenser fan assembly, a hot water pump is provided below the preheating tank, a heating element is provided above the preheating tank, and the water source connection port is communicated with the interior of the preheating tank and the cold tank at the same time.

[0012] Preferably, a cold water pump is provided between the hot water pump and the compressor, and the cold water pump and the hot water pump are communicated with the interior of the cold tank and the preheating tank respectively.

[0013] Preferably, a water level probe is provided on the upper side of the middle position inside the carbonated water tank, a temperature sensor located inside the cold tank is provided in front of the water level probe, and a water level sensor is provided in front of and below the temperature sensor.

[0014] Preferably, the synchronous movement mechanism includes a circular base, the bottom end of the circular base is connected to the inner wall of the cold tank via a roller bearing, and the lower end surface of the carbonated water tank is also connected to the circular base via a roller bearing.

[0015] Preferably, a mobile stepping motor is fixedly installed on the upper side of the middle position inside the circular base, and the output shaft of the mobile stepping motor is connected to the transmission shaft through a coupling. The outer surface of the transmission shaft is fixedly sleeved with a second bevel gear, and two of the outer surfaces of the second bevel gears are meshed with a first bevel gear.

[0016] Preferably, the axis of the first bevel gear is connected to a threaded rod transmission shaft, one end of the threaded rod transmission shaft is connected to a threaded rod, both sides of the outer surface of the threaded rod are sleeved with an internal threaded sleeve matching its external thread, a push rod is provided above the internal threaded sleeve, and the surface of the internal threaded sleeve facing the push rod is fixed to the push rod.

[0017] Preferably, the first and fourth pushing rods from left to right are respectively fixed between two of the second right-angle rods, and the second and third pushing rods from left to right are respectively fixed between two of the first right-angle rods.

[0018] Preferably, the rotating mechanism comprises a rotating stepping motor, the output shaft of the rotating stepping motor is connected to a rotating shaft via a coupling, and the upper end surface of the rotating shaft is fixed to the center point of the lower end surface of the circular base.

[0019] When the device is needed, the water source pipe is connected through the water source connection port, and the water source entering the water source connection port will enter the interior of the cold tank. The compressor can cool the water source entering the cold tank, and the carbonation booster pump can pump the cooled water source from the interior of the cold tank to the interior of the carbonated water tank, and pressurize it to make it contact with the carbonation tank located in the CO2 tank. 2 CO inside the gas cylinder 2 The gases are mixed to produce carbonated water. The above technical solution enables the device to output carbonated water in addition to cold water and hot water, thereby increasing the diversity of its flavors and improving the market competitiveness of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the present invention as a whole;

[0022] Figure 3 This is a front view of the internal structure of the first embodiment of the present invention;

[0023] Figure 4 This is a front view of the internal structure of the second embodiment of the present invention;

[0024] Figure 5 For the present invention Figure 4 A magnified view of the structure at center A;

[0025] Figure 6 For the present invention Figure 5 A magnified view of the structure at point B. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Two embodiments provided by the present invention are:

[0028] See also Figures 1 to 3 The first embodiment of the present invention is shown. The water dispenser includes a multi-flavor water dispenser 1. The multi-flavor water dispenser 1 includes a water source connection port 9, a pressure reducing valve 3, a CO 2 The gas cylinder 4, the carbonic acid booster pump 8, the cold tank 16, the carbonated water tank 10, the compressor 6, the compressor cooling annular pipe 18 and the carbonated water pump 17, the water source connection port 9 is communicated with the interior of the cold tank 16, the carbonated water tank 10 is fixed to the upper side of the interior of the cold tank 16, and the carbonated water pump 17 is installed on the upper end surface of the cold tank 16 and communicated with the interior of the carbonated water tank 10;

[0029] The compressor cooling annular pipe 18 is wound around the outer surface of the carbonated water tank 10 and connected to the compressor 6;

[0030] CO 2 The gas cylinder 4 is connected to the lower end surface of the pressure reducing valve 3, the pressure reducing valve 3 is communicated with the interior of the carbonated water tank 10, and the carbonation booster pump 8 is communicated with the interior of the cold tank 16 and the carbonated water tank 10 at the same time;

[0031] The water source connection port 9 can deliver the water source to the inside of the cold tank 16, the compressor 6 can cool the water source through the compressor cooling loop pipe 18, the carbonation booster pump 8 can extract the cooled water source in the cold tank 16 and deliver it to the inside of the carbonated water tank 10, and the carbonation booster pump 8 can pressurize the water source while pouring it into the carbonated water tank 10;

[0032] Pressure reducing valve 3 can extract the CO 2 CO in cylinder 4 2 The gas is then injected into the carbonated water tank 10. The CO 2 The gas will mix with the pressurized water source, and when CO 2 When the gas is mixed with the pressurized water source, it will become carbonated water, which can be pumped out by the carbonated water pump 17 and discharged.

[0033] Furthermore, the multi-flavor water dispenser 1 also includes a condenser fan assembly 5, a preheating tank 14 is provided at the rear of the condenser fan assembly 5, a hot water pump 15 is provided below the preheating tank 14, a heating element 13 is provided above the preheating tank 14, and a water source connection port 9 is communicated with the interior of the preheating tank 14 and the cold tank 16 at the same time; a cold water pump 7 is provided between the hot water pump 15 and the compressor 6, and the cold water pump 7 and the hot water pump 15 are respectively communicated with the interior of the cold tank 16 and the preheating tank 14; the cold water pump 7 can directly draw the water source cooled in the cold tank 16 and discharge it through the drain port on the multi-flavor water dispenser 1, and the above technical solution enables the device to discharge cold water.

[0034] A portion of the water source that enters the water source connection port 9 will enter the interior of the preheating tank 14, and the water source can be heated by the heating element 13, and the water source can be extracted by the hot water pump 15 and discharged through the drain port on the multi-flavor water dispenser 1. Through the above technical solution, the device itself can produce carbonated water in addition to cold water and hot water, which increases the diversity of its flavors, thereby improving the market competitiveness of the device.

[0035] In actual application, a water level probe 19 is provided on the upper side of the middle position inside the carbonated water tank 10, a temperature sensor 12 located inside the cold tank 16 is provided in front of the water level probe 19, and a water level sensor 11 is provided in front of and below the temperature sensor 12; the water level probe 19 can monitor the amount of carbonated water inside the carbonated water tank 10 in real time, the temperature sensor 12 located inside the cold tank 16 can monitor the temperature of carbonated water and the water source located inside the cold tank 16 in real time, and the two water level sensors 11 can monitor the amount of water source located inside the cold tank 16 in real time. When the water level is low, the multi-flavor water dispenser 1 will automatically add water to the inside of the cold tank 16.

[0036] like Figures 4 to 6 As shown, based on the above first embodiment, the present invention also provides a second embodiment, the water dispenser includes a multi-flavor water dispenser 1, the multi-flavor water dispenser 1 includes a water source connection port 9, a pressure reducing valve 3, a CO 2 The gas cylinder 4, the carbonic acid booster pump 8, the cold tank 16, the carbonated water tank 10, the compressor 6, the compressor cooling annular pipe 18 and the carbonated water pump 17, the water source connection port 9 is communicated with the interior of the cold tank 16, the carbonated water tank 10 is fixed to the upper side of the interior of the cold tank 16, and the carbonated water pump 17 is installed on the upper end surface of the cold tank 16 and communicated with the interior of the carbonated water tank 10;

[0037] The compressor cooling annular pipe 18 is wound around the outer surface of the carbonated water tank 10 and connected to the compressor 6;

[0038] CO 2The gas cylinder 4 is connected to the lower end surface of the pressure reducing valve 3, the pressure reducing valve 3 is communicated with the interior of the carbonated water tank 10, and the carbonation booster pump 8 is communicated with the interior of the cold tank 16 and the carbonated water tank 10 at the same time;

[0039] The water source connection port 9 can deliver the water source to the inside of the cold tank 16, the compressor 6 can cool the water source through the compressor cooling loop pipe 18, the carbonation booster pump 8 can extract the cooled water source in the cold tank 16 and deliver it to the inside of the carbonated water tank 10, and the carbonation booster pump 8 can pressurize the water source while pouring it into the carbonated water tank 10;

[0040] Pressure reducing valve 3 can extract the CO 2 CO in cylinder 4 2 The gas is then injected into the carbonated water tank 10. The CO 2 The gas will mix with the pressurized water source, and when CO 2 When the gas is mixed with the pressurized water source, it will become carbonated water. The carbonated water can be pumped out by the carbonated water pump 17 and discharged through the water outlet 1 of the multi-flavor water dispenser.

[0041] The multi-flavor water dispenser 1 also includes a condenser fan assembly 5, a preheating tank 14 is provided at the rear of the condenser fan assembly 5, a hot water pump 15 is provided below the preheating tank 14, a heating element 13 is provided above the preheating tank 14, and a water source connection port 9 is communicated with the interior of the preheating tank 14 and the cold tank 16 at the same time.

[0042] Furthermore, a water level probe 19 is provided on the upper side of the middle position inside the carbonated water tank 10 , a temperature sensor 12 located inside the cold tank 16 is provided in front of the water level probe 19 , and a water level sensor 11 is provided in front of and below the temperature sensor 12 .

[0043] Specifically, a telescopic water tank self-cleaning mechanism 2 is fixedly installed on the lower side of the cold tank 16. The telescopic water tank self-cleaning mechanism 2 includes two first right-angle rods 211, two second right-angle rods 212, a synchronous movement mechanism and a rotation mechanism. The two first right-angle rods 211 are respectively located on both sides of the carbonated water tank 10, and the two second right-angle rods 212 are respectively located on both sides of the cold tank 16. The distance between the first right-angle rod 211 and the inner wall of the carbonated water tank 10 is the same as the distance between the second right-angle rod 212 and the inner wall of the cold tank 16. The synchronous movement mechanism can synchronously drive the two first right-angle rods 211 and The two second right-angle rods 212 move outward synchronously, and through the rotating mechanism, the two first right-angle rods 211 and the two second right-angle rods 212 can be driven to revolve around the central point inside the carbonated water tank 10; the synchronous moving mechanism includes a circular base 203, and the bottom end of the circular base 203 is connected to the inner wall of the cold tank 16 through a roller bearing, and the lower end surface of the carbonated water tank 10 is also connected to the circular base 203 through a roller bearing; the roller bearing between the carbonated water tank 10 and the circular base 203 can prevent the water source inside the cold tank 16 and the water source inside the carbonated water tank 10 from mixing.

[0044] A moving stepper motor 204 is fixedly installed on the upper side of the middle position inside the circular base 203, and the output shaft of the moving stepper motor 204 is connected to the transmission shaft 205 through a coupling. The outer surface of the transmission shaft 205 is fixedly sleeved with a second bevel gear 213, and the outer surfaces of the second bevel gears 213 are meshed with a first bevel gear 206; when the device has been running for more than a week, the moving stepper motor 204 is started, and the moving stepper motor 204 can drive the transmission shaft 205 connected thereto and the two bevel gears 213 fixedly sleeved on the outer surface of the transmission shaft 205 to rotate, and the rotating two bevel gears 213 can drive the two first bevel gears 206 meshed therewith to rotate synchronously.

[0045] The axis of the first bevel gear 206 is connected to a threaded rod transmission shaft 207, one end of the threaded rod transmission shaft 207 is connected to a threaded rod 208, both sides of the outer surface of the threaded rod 208 are sleeved with an internal threaded sleeve 209 matching its external thread, a push rod 210 is provided above the internal threaded sleeve 209, and the surface of the internal threaded sleeve 209 facing the push rod 210 is fixed to the push rod 210; when the first bevel gear 206 rotates, the threaded rod transmission shaft 207 connected to the axis of the first bevel gear 206 and the threaded rod 208 fixed thereto will rotate together with it, and when the threaded rod 208 rotates, the internal threaded sleeve 209 sleeved on its outer surface and threadedly connected thereto will move on the outer surface of the threaded rod 208 under the transmission of the threaded structure, and at this time, the four internal threaded sleeves 209 respectively sleeved on the outer surfaces of the two threaded rods 208 will move outward synchronously.

[0046] The first and fourth push rods 210 from left to right are fixed between the two second right-angle rods 212, respectively, and the second and third push rods 210 from left to right are fixed between the two first right-angle rods 211, respectively; the first right-angle rod 211 and the second right-angle rod 212 are both provided with a strip bristle fixing base on the surface facing the inner wall of the carbonated water tank 10 and the cold tank 16, and the surface of the strip bristle fixing base located inside the carbonated water tank 10 facing the inner wall of the carbonated water tank 10 and the surface of the strip bristle fixing base located inside the cold tank 16 facing the inner wall of the cold tank 16 are both provided with There are bristles; as the four internally threaded sleeves 209 move, the two second right-angle rods 212 and the two first right-angle rods 211 respectively connected to the four internally threaded sleeves 209 through the push rod 210 will move outward synchronously therewith. Since the distances between the first right-angle rod 211 and the second right-angle rod 212 and the inner walls of the carbonated water tank 10 and the cold tank 16 are the same, when the bristles indirectly connected between the first right-angle rods 211 contact the inner wall of the carbonated water tank 10, the bristles indirectly connected between the second right-angle rods 212 will also contact the inner wall of the cold tank 16.

[0047] Please continue reading Figures 4 to 6 The rotating mechanism provided by the present invention includes a rotating stepper motor 201, the output shaft of the rotating stepper motor 201 is connected to a rotating shaft 202 through a coupling, and the upper end surface of the rotating shaft 202 is fixed to the center point of the lower end surface of the circular base 203; when the bristles indirectly connected to the first right-angle rod 211 and the second right-angle rod 212 respectively contact the inner walls of the carbonated water tank 10 and the cold tank 16, the rotating stepper motor 201 is started to drive the circular base 203 connected to it through the rotating shaft 202 to rotate, when When the circular base 203 rotates, the two first right-angle rods 211 and the two second right-angle rods 212 indirectly connected thereto will revolve therewith. When the first right-angle rod 211 and the second right-angle rod 212 revolve, the bristles indirectly connected thereto will generate friction with the inner walls of the carbonated water tank 10 and the cold tank 16, respectively, so as to clean the scale on their inner walls. Through the above technical solution, the inner walls of the carbonated water tank 10 and the cold tank 16 can be automatically cleaned to ensure the quality of the water source output by the equipment.

[0048] When the cleaning is completed, the moving stepper motor 204 is started again, and the transmission shaft 205 is rotated in the opposite direction to move the first right-angle rod 211 and the second right-angle rod 212 back to their original positions. Through the above technical solution, when the first right-angle rod 211 and the second right-angle rod 212 are not in use, they can be kept away from the inner walls of the carbonated water tank 10 and the cold tank 16 to prevent friction between the two, which would cause the first right-angle rod 211 and the second right-angle rod 212 to wear quickly and reduce their service life. In addition, the first right-angle rod 211 and the second right-angle rod 212 can be moved outward synchronously through the synchronous moving mechanism until they come into contact with the carbonated water tank 10 and the cold tank 16. This structure can prevent the first right-angle rod 211 and the second right-angle rod 212 from being worn out, thereby preventing them from being unable to contact the inner walls of the carbonated water tank 10 and the cold tank 16 and losing their original functions.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A water dispenser, characterized in that: The invention comprises a multi-flavor water dispenser; the multi-flavor water dispenser comprises a water source connection port, a pressure reducing valve, a CO2 gas cylinder, a carbonic acid booster pump, a cold tank, a carbonated water tank, a compressor, a compressor cooling annular pipe and a carbonated water pump, the water source connection port is communicated with the interior of the cold tank, the carbonated water tank is fixed on the upper side of the interior of the cold tank, and the carbonated water pump is installed on the upper end surface of the cold tank and communicated with the interior of the carbonated water tank; The compressor cooling annular pipe is wound around the outer surface of the carbonated water tank and connected to the compressor; The CO2 gas cylinder is connected to the lower end surface of the pressure reducing valve, the pressure reducing valve is communicated with the interior of the carbonated water tank, and the carbonic acid booster pump is communicated with the interior of the cold tank and the carbonated water tank at the same time.

2. The water dispenser according to claim 1, characterized in that: A telescopic water storage tank self-cleaning mechanism is fixedly installed on the lower side of the interior of the cold tank, and the telescopic water storage tank self-cleaning mechanism includes two first right-angle rods, two second right-angle rods, a synchronous movement mechanism and a rotation mechanism, the two first right-angle rods are respectively located on both sides of the interior of the carbonated water tank, the two second right-angle rods are respectively located on both sides of the interior of the cold tank, and the distance between the first right-angle rod and the inner wall of the carbonated water tank is the same as the distance between the second right-angle rod and the inner wall of the cold tank, the synchronous movement mechanism synchronously drives the two first right-angle rods and the two second right-angle rods to move outward synchronously, and the rotation mechanism drives the two first right-angle rods and the two second right-angle rods to revolve around the center point of the interior of the carbonated water tank; The surfaces of the first right-angle rod and the second right-angle rod facing the inner walls of the carbonated water tank and the cold tank are both provided with a strip bristle fixing base, and the surfaces of the strip bristle fixing base located inside the carbonated water tank facing the inner wall of the carbonated water tank and the surfaces of the strip bristle fixing base located inside the cold tank facing the inner wall of the cold tank are both provided with bristles.

3. The water dispenser according to claim 1, characterized in that: The multi-flavor water dispenser also includes a condenser fan assembly, a preheating tank is provided at the rear of the condenser fan assembly, a hot water pump is provided below the preheating tank, a heating element is provided above the preheating tank, and the water source connection port is communicated with the interior of the preheating tank and the cold tank at the same time.

4. The water dispenser according to claim 3, characterized in that: A cold water pump is provided between the hot water pump and the compressor, and the cold water pump and the hot water pump are communicated with the interior of the cold tank and the preheating tank respectively.

5. The water dispenser according to claim 1, characterized in that: A water level probe is provided on the upper side of the middle position inside the carbonated water tank, a temperature sensor located inside the cold tank is provided in front of the water level probe, and a water level sensor is provided in front of and below the temperature sensor.

6. The water dispenser according to claim 2, characterized in that: The synchronous moving mechanism comprises a circular base, the bottom end of the circular base is connected to the inner wall of the cold tank via a roller bearing, and the lower end surface of the carbonated water tank is also connected to the circular base via a roller bearing.

7. The water dispenser according to claim 6, characterized in that: A moving stepper motor is fixedly installed on the upper side of the middle position inside the circular base, and the output shaft of the moving stepper motor is connected to a transmission shaft through a coupling. A second bevel gear is fixedly sleeved on the outer surface of the transmission shaft, and two of the outer surfaces of the second bevel gears are meshed with a first bevel gear.

8. The water dispenser according to claim 7, characterized in that: The axis of the first bevel gear is connected to a threaded rod transmission shaft, one end of the threaded rod transmission shaft is connected to a threaded rod, both sides of the outer surface of the threaded rod are sleeved with an internal thread sleeve matching its external thread, a push rod is provided above the internal thread sleeve, and the surface of the internal thread sleeve facing the push rod is fixed to the push rod.

9. The water dispenser according to claim 8, characterized in that: The first and fourth pushing rods from left to right are respectively fixed between the two second right-angle rods, and the second and third pushing rods from left to right are respectively fixed between the two first right-angle rods.

10. The water dispenser according to claim 2, characterized in that: The rotating mechanism comprises a rotating stepping motor, the output shaft of the rotating stepping motor is connected to a rotating shaft via a coupling, and the upper end surface of the rotating shaft is fixed to the center point of the lower end surface of the circular base.

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