CN217177015U

CN217177015U - Hydraulic control system

Info

Publication number: CN217177015U
Application number: CN202220088417.8U
Authority: CN
Inventors: 张西劲; 郭政; 徐啸; 闫宪勇
Original assignee: Tengzhou Hange Hydraulic Machinery Co Ltd
Current assignee: Tengzhou Hange Hydraulic Machinery Co Ltd
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-08-12
Anticipated expiration: 2032-01-14

Abstract

The utility model relates to the technical field of hydraulic control, in particular to a hydraulic control system, the hydraulic oil in the oil tank is discharged into the hydraulic cylinder through the hydraulic pump, meanwhile, the connecting pipe is closed by the sealing plug through the extension of the electric push rod in the top pressure-maintaining device, so that the hydraulic cylinder is extended, and then when the first hydraulic cylinder is retracted, the electric push rod in the top pressure-retaining device is contracted to open the connecting pipe and discharge the hydraulic oil in the hydraulic cylinder, impurities in the hydraulic oil are filtered by the filtering device, the hydraulic oil is cooled by the cooling device, and the flow velocity of the hydraulic oil is detected in real time by the flow velocity sensors in the two groups of pressure-maintaining devices, when pressure maintaining is carried out on the hydraulic cylinder, the two groups of connecting pipes are closed by extending the electric push rods in the two groups of pressure maintaining devices, so that the energy consumption of the hydraulic pump is reduced, and the practicability of the equipment is improved; the hydraulic pump comprises a hydraulic pump, a hydraulic cylinder, a first oil delivery pipe, a second oil delivery pipe, two groups of pressure maintaining devices, a cooling device and a filtering device.

Description

Hydraulic control system

Technical Field

The utility model relates to a hydraulic control's technical field especially relates to a hydraulic control system.

Background

The hydraulic system functions to increase the force by changing the pressure. But current hydraulic system structure is fairly simple, and the pressurize effect is relatively poor to hydraulic system long-time during operation, the hydraulic oil temperature among the hydraulic system risees easily, influences hydraulic system's normal use, leads to the practicality relatively poor, consequently needs to improve current equipment.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model provides a go into the inside to the pneumatic cylinder through the hydraulic pump with the hydraulic oil in the oil tank, electric putter through among the top pressure equipment extends to make the sealing plug close the connecting pipe simultaneously, make the pneumatic cylinder extend, during later the pneumatic cylinder shrink, through the electric putter shrink among the top pressure equipment, make the connecting pipe open, discharge the hydraulic oil in the pneumatic cylinder, impurity through filter equipment in to the hydraulic oil filters, there is cooling to hydraulic pressure through the heat sink, and detect the velocity of flow of hydraulic oil through the flow rate sensor among two sets of pressure equipment in real-time, when carrying out the pressurize to the pneumatic cylinder, electric putter through among two sets of pressure equipment extends, close two sets of connecting pipes, reduce the energy consumption of hydraulic pump, thereby improve a hydraulic control system of equipment's practicality.

The utility model discloses a hydraulic control system, including the hydraulic pump, the pneumatic cylinder, first defeated oil pipe, the second defeated oil pipe, two sets of pressurizers, heat sink and filter equipment, be provided with the oil tank on the hydraulic pump, the right-hand member of hydraulic pump is provided with the delivery outlet, the left end of pneumatic cylinder is provided with oil inlet and oil drain port, two sets of pressurizers are installed respectively on the oil inlet and the oil drain port of pneumatic cylinder, the bottom pressurizer is installed on the delivery outlet of hydraulic pump through first defeated oil pipe, the right-hand member of second defeated oil pipe is installed on top pressurizer, filter equipment installs in the left end of second defeated oil pipe, the left end of filter equipment is installed on heat sink, the left end of heat sink is installed on the oil tank, pressurize is carried out the pneumatic cylinder through the pressurizer, filter hydraulic oil through the filter equipment, there is cooling to the hydraulic pressure through heat sink;

the pressure maintaining device comprises a connecting pipe, a sealing box, an electric push rod, a tension spring, a sealing plug and a flow velocity sensor, wherein the bottom end of the sealing box is connected with the top end of the connecting pipe;

the inside to the pneumatic cylinder is discharged to through the hydraulic pump with the hydraulic oil in the oil tank, extend through the electric putter in the top pressure equipment simultaneously and make the sealing plug close the connecting pipe, make the pneumatic cylinder extend, later during the second pneumatic cylinder shrink, through the electric putter shrink in the top pressure equipment, make the connecting pipe open, discharge the hydraulic oil in the pneumatic cylinder, filter the impurity in the hydraulic oil through filter equipment, there is cooling down to hydraulic pressure through the heat sink, and detect the real-time velocity of flow to the hydraulic oil through the velocity of flow sensor in two sets of pressure equipment, when carrying out the pressurize to the pneumatic cylinder, extend through the electric putter in two sets of pressure equipment, close two sets of connecting pipes, reduce the energy consumption of hydraulic pump, thereby improve equipment's practicality.

Preferably, the filtering device comprises a filtering bin, a plurality of groups of filter screens and a plurality of groups of magnets, a cavity is arranged inside the filtering bin, the left end of the filtering bin is installed on the cooling device, the right end of the filtering bin is connected with the left end of the second oil conveying pipe, the plurality of groups of filter screens are all installed inside the filtering bin, and the plurality of groups of magnets are respectively connected with the side ends of the plurality of groups of filter screens; the inside that pneumatic cylinder exhaust hydraulic oil got into to filtering the storehouse through the defeated oil pipe of second makes the multiunit filter screen in the filter storehouse filter the impurity in the hydraulic oil, adsorbs the metal particle in the hydraulic oil through multiunit magnet simultaneously, reduces the influence of impurity and metal particle to the hydraulic pump to reduce the fault rate of equipment.

Preferably, the cooling device comprises a cooling box, a cooling pipe, a refrigeration box, a circulating pump, a conveying pipe and a plurality of groups of exhaust fans, wherein the left end of the cooling box is connected with the right end of the oil tank, the top of the side end of the cooling box is provided with an exhaust port, the cooling pipe is positioned inside the cooling box, the left end of the cooling pipe is communicated with the inside of the oil tank, the right end of the cooling pipe is connected with the left end of the filter bin, the bottom end of the refrigeration box is connected with the top end of the cooling box, the top end of the refrigeration box is provided with a feed valve, the inside of the refrigeration box is provided with a refrigeration plate, the side end of the circulating pump is connected with the right end of the refrigeration box, the left end of the circulating pump is provided with a water suction port, the bottom end of the circulating pump is provided with a water outlet, the water suction port of the circulating pump is communicated with the inside of the refrigeration box, the bottom end of the conveying pipe is connected with the bottom end inside of the cooling box, and one end of the conveying pipe is connected with the water outlet of the circulating pump, the other end of the conveying pipe is communicated with the inside of the refrigeration box, and the plurality of groups of exhaust fans are all arranged on the conveying pipe; discharge the coolant liquid to the inside of refrigeration case, cool down the coolant liquid through the refrigeration board of refrigeration incasement, the hydraulic oil of crossing in the filter house simultaneously gets into the inside to the cooling tube, later the circulating pump discharges the coolant liquid into the inside to the conveyer pipe, the other end of rethread conveyer pipe discharges the coolant liquid back to the inside of refrigeration case, the low temperature that makes the coolant liquid is cooled down to the inside of cooling case, blow low temperature air to the cooling tube through opening the multiunit exhaust fan, cool down the hydraulic oil in the cooling tube, later discharge steam through the gas vent of cooling case, and discharge back to the oil tank through the hydraulic oil after the cooling tube after, thereby improve equipment is to the cooling effect of hydraulic oil.

Preferably, the device also comprises a plurality of groups of sealing rings which are respectively arranged in connecting pipes on the two groups of pressurizers; the connecting pipe is closed by the sealing ring matched with the sealing plug, so that the sealing effect of the sealing plug is improved.

Preferably, the refrigerator further comprises a transmission case, a driving motor and a stirring shaft, wherein the bottom end of the transmission case is connected with the top end of the refrigeration case, an input end is arranged at the side end of the transmission case, an output end is arranged at the bottom end of the transmission case, the driving motor is installed at the side end of the transmission case, the side end of the driving motor is connected with the input end of the transmission case, the top end of the stirring shaft is connected with the output end of the transmission case, and the bottom end of the stirring shaft extends into the refrigeration case from the top end of the refrigeration case; through opening driving motor, through the transmission of transmission case, make the (mixing) shaft rotate, stir the coolant liquid of refrigeration incasement, make the refrigeration board of refrigeration incasement evenly cool down to the coolant liquid to improve equipment's practicality.

Preferably, the cooling device also comprises a plurality of groups of radiating fins which are all arranged on the surface of the cooling pipe; through the inside of multiunit fin with the intraductal heat diffusion of cooling to cooling box, make things convenient for the multiunit exhaust fan to have the hydraulic pressure in the cooling pipe and cool down to improve equipment's practicality.

Preferably, the refrigerator also comprises an observation window, and the rear end of the observation window is connected with the front end of the refrigeration box; through setting up the observation window, make things convenient for the staff to observe the liquid level of cooling liquid in the refrigeration case to improve equipment's convenience.

Compared with the prior art, the beneficial effects of the utility model are that: the inside to the pneumatic cylinder is discharged to through the hydraulic pump with the hydraulic oil in the oil tank, extend through the electric putter in the top pressure equipment simultaneously and make the sealing plug close the connecting pipe, make the pneumatic cylinder extend, later during the second pneumatic cylinder shrink, through the electric putter shrink in the top pressure equipment, make the connecting pipe open, discharge the hydraulic oil in the pneumatic cylinder, filter the impurity in the hydraulic oil through filter equipment, there is cooling down to hydraulic pressure through the heat sink, and detect the real-time velocity of flow to the hydraulic oil through the velocity of flow sensor in two sets of pressure equipment, when carrying out the pressurize to the pneumatic cylinder, extend through the electric putter in two sets of pressure equipment, close two sets of connecting pipes, reduce the energy consumption of hydraulic pump, thereby improve equipment's practicality.

Drawings

Fig. 1 is a schematic front sectional view of the present invention;

fig. 2 is a schematic front view of the present invention;

FIG. 3 is an enlarged front view of the pressurizer of the present invention;

FIG. 4 is an enlarged schematic view of the axial section of the filtering device of the present invention;

in the drawings, the reference numbers: 1. a hydraulic pump; 2. a hydraulic cylinder; 3. an oil tank; 4. a first oil delivery pipe; 5. a second oil delivery pipe; 6. a connecting pipe; 7. a sealing box; 8. an electric push rod; 9. a tension spring; 10. a sealing plug; 11. a flow rate sensor; 12. a filtering bin; 13. filtering with a screen; 14. a magnet; 15. a cooling box; 16. a cooling pipe; 17. a refrigeration case; 18. a circulation pump; 19. a delivery pipe; 20. an exhaust fan; 21. a seal ring; 22. a transmission case; 23. a drive motor; 24. a stirring shaft; 25. a heat sink; 26. and (4) an observation window.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Example 1

An oil tank 3 is arranged on the hydraulic pump 1, an output port is arranged at the right end of the hydraulic pump 1, an oil inlet and an oil discharge port are arranged at the left end of the hydraulic cylinder 2, two groups of pressure maintaining devices are respectively installed on the oil inlet and the oil discharge port of the hydraulic cylinder 2, a bottom pressure maintaining device is installed on the output port of the hydraulic pump 1 through a first oil pipeline 4, the right end of a second oil pipeline 5 is installed on a top pressure maintaining device, a filtering device is installed at the left end of the second oil pipeline 5, the left end of the filtering device is installed on a cooling device, the left end of the cooling device is installed on the oil tank 3, the hydraulic cylinder 2 is subjected to pressure maintaining through the pressure maintaining device, hydraulic oil is filtered through the filtering device, and the hydraulic oil is cooled through the cooling device;

the pressure maintaining device comprises a connecting pipe 6, a sealing box 7, an electric push rod 8, a tension spring 9, a sealing plug 10 and a flow velocity sensor 11, wherein the bottom end of the sealing box 7 is connected with the top end of the connecting pipe 6, the top ends of the electric push rod 8 and the tension spring 9 are both connected with the top end in the sealing box 7, the bottom ends of the electric push rod 8 and the tension spring 9 are both connected with the top end of the sealing plug 10, and the flow velocity sensor 11 is installed inside the connecting pipe 6;

the filtering device comprises a filtering bin 12, a plurality of groups of filtering screens 13 and a plurality of groups of magnets 14, a cavity is arranged inside the filtering bin 12, the left end of the filtering bin 12 is installed on the cooling device, the right end of the filtering bin 12 is connected with the left end of the second oil conveying pipe 5, the plurality of groups of filtering screens 13 are all installed inside the filtering bin 12, and the plurality of groups of magnets 14 are respectively connected with the side ends of the plurality of groups of filtering screens 13;

the hydraulic oil in the oil tank 3 is discharged into the hydraulic cylinder 2 through the hydraulic pump 1, meanwhile, the connecting pipe 6 is closed by the sealing plug 10 through the extension of the electric push rod 8 in the top pressure-holding device, the hydraulic cylinder 2 is extended, then, when the hydraulic cylinder 2 is retracted, the connecting pipe 6 is opened through the contraction of the electric push rod 8 in the top pressure-holding device, the hydraulic oil in the hydraulic cylinder 2 is discharged, then, the hydraulic oil discharged from the hydraulic cylinder 2 enters the inside of the filtering bin 12 through the second oil conveying pipe 5, a plurality of groups of filter screens 13 in the filtering bin 12 filter impurities in the hydraulic oil, and simultaneously, metal particles in the hydraulic oil are adsorbed through a plurality of groups of magnets 14, so that the influence of the impurities and the metal particles on the hydraulic pump 1 is reduced, the hydraulic pressure is cooled through the cooling device, and the flow rate of the hydraulic oil is detected through the flow rate sensors 11 in the two groups of pressure-holding devices in real time, when carrying out the pressurize to pneumatic cylinder 2, extend through electric putter 8 among two sets of pressure protecting devices, close two sets of connecting pipes 6, reduce the energy consumption of hydraulic pump 1 to improve equipment's practicality.

Example 2

the cooling device comprises a cooling box 15, a cooling pipe 16, a refrigerating box 17, a circulating pump 18, a conveying pipe 19 and a plurality of groups of exhaust fans 20, wherein the left end of the cooling box 15 is connected with the right end of the oil tank 3, the top of the side end of the cooling box 15 is provided with an exhaust port, the cooling pipe 16 is positioned inside the cooling box 15, the left end of the cooling pipe 16 is communicated with the inside of the oil tank 3, the right end of the cooling pipe 16 is connected with the left end of the filtering bin 12, the bottom end of the refrigerating box 17 is connected with the top end of the cooling box 15, the top end of the refrigerating box 17 is provided with a feed valve, the inside of the refrigerating box 17 is provided with a refrigerating plate, the side end of the circulating pump 18 is connected with the right end of the refrigerating box 17, the left end of the circulating pump 18 is provided with a water suction port, the bottom end of the circulating pump 18 is provided with a water discharge port, the water suction port of the circulating pump 18 is communicated with the inside of the refrigerating box 17, the bottom end of the conveying pipe 19 is connected with the bottom end inside of the cooling box 15, one end of the delivery pipe 19 is connected with a water outlet of the circulating pump 18, the other end of the delivery pipe 19 is communicated with the inside of the refrigeration box 17, and a plurality of groups of exhaust fans 20 are all arranged on the delivery pipe 19;

the hydraulic oil in the oil tank 3 is discharged into the hydraulic cylinder 2 through the hydraulic pump 1, meanwhile, the sealing plug 10 is enabled to close the connecting pipe 6 through the extension of the electric push rod 8 in the top pressure-holding device, the hydraulic cylinder 2 is enabled to extend, then, when the first hydraulic cylinder 2 is retracted, the electric push rod 8 in the top pressure-holding device is retracted, the connecting pipe 6 is enabled to be opened, the hydraulic oil in the hydraulic cylinder 2 is discharged, impurities in the hydraulic oil are filtered through the filtering device, then, the cooling liquid is discharged into the refrigerating box 17, the cooling liquid is cooled through the refrigerating plate in the refrigerating box 17, meanwhile, the hydraulic oil in the filtering bin 12 enters the cooling pipe 16, then, the circulating pump 18 discharges the cooling liquid into the conveying pipe 19, the cooling liquid is discharged back into the refrigerating box 17 through the other end of the conveying pipe 19, and the low temperature of the cooling liquid is enabled to cool the inside of the cooling box 15, blow low temperature air to cooling tube 16 through opening multiunit exhaust fan 20, cool down to the hydraulic oil in cooling tube 16, later discharge steam through the gas vent of cooling box 15, hydraulic oil after the rethread cooling tube 16 will cool down is arranged back to in oil tank 3, and detect the real-time velocity of flow to hydraulic oil of velocity sensor 11 through two sets of pressure retaining devices, when carrying out the pressurize to pneumatic cylinder 2, extend through electric putter 8 in two sets of pressure retaining devices, close two sets of connecting pipes 6, reduce the energy consumption of hydraulic pump 1, thereby improve equipment's practicality.

As shown in fig. 1 to 4, the utility model discloses a hydraulic control system, when it works, at first, arrange the hydraulic oil in the oil tank 3 into the inside of pneumatic cylinder 2 through hydraulic pump 1, extend simultaneously through the electric putter 8 in the top pressure equipment and make the sealing plug 10 close connecting pipe 6, make pneumatic cylinder 2 extend, later when pneumatic cylinder 2 contracts, through the electric putter 8 shrink in the top pressure equipment, make connecting pipe 6 open, discharge the hydraulic oil in the pneumatic cylinder 2, then the hydraulic oil that pneumatic cylinder 2 discharged enters into the inside of filter bin 12 through second defeated oil pipe 5, make the multiunit filter screen 13 in the filter bin 12 filter the impurity in the hydraulic oil, adsorb the metal particles in the hydraulic oil through multiunit magnet 14 simultaneously, reduce the influence of impurity and metal particles to hydraulic pump 1, later discharge the coolant liquid into the inside of refrigeration case 17, the cooling liquid in the refrigerating box 17 is stirred by turning on the driving motor 23 and transmitting the driving motor through the transmission box 22, the cooling liquid is cooled by the refrigerating plate in the refrigerating box 17, meanwhile, the hydraulic oil in the filtering bin 12 enters the cooling pipe 16, then the cooling liquid is discharged into the conveying pipe 19 by the circulating pump 18, then the cooling liquid is discharged back into the refrigerating box 17 by the other end of the conveying pipe 19, meanwhile, the heat in the cooling pipe 16 is diffused into the cooling box 15 by the plurality of groups of radiating fins 25, so that the low temperature of the cooling liquid cools the inside of the cooling box 15, then, the low-temperature air is blown to the cooling pipe 16 by turning on the plurality of groups of exhaust fans 20, the hydraulic oil in the cooling pipe 16 is cooled, then, the hot air is discharged through the exhaust port of the cooling box 15, and the cooled hydraulic oil is discharged back into the oil tank 3 by the cooling pipe 16, and the flow velocity of the hydraulic oil is detected in real time through the flow velocity sensors 11 in the two groups of pressure maintaining devices, when the hydraulic cylinder 2 is subjected to pressure maintaining, the electric push rods 8 in the two groups of pressure maintaining devices are extended to close the two groups of connecting pipes 6, and the energy consumption of the hydraulic pump 1 is reduced.

The utility model discloses the main function who realizes does: pressurize the pneumatic cylinder 2 when needing to carry out edulcoration and cooling to the hydraulic oil of recycling.

The installation mode, the connection mode or the setting mode of the hydraulic control system of the utility model are common mechanical modes, and the hydraulic control system can be implemented as long as the beneficial effects can be achieved; the utility model discloses a hydraulic control system's hydraulic pump 1, pneumatic cylinder 2, electric putter 8, circulating pump 18, exhaust fan 20 and driving motor 23 for purchase on the market, this industry technical staff only need according to its subsidiary service instruction install and operate can, and need not the technical staff in the field and pay out creative work.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic control system is characterized by comprising a hydraulic pump (1), a hydraulic cylinder (2), a first oil delivery pipe (4), a second oil delivery pipe (5), two groups of pressure maintaining devices, a cooling device and a filtering device, wherein the hydraulic pump (1) is provided with an oil tank (3), the right end of the hydraulic pump (1) is provided with an output port, the left end of the hydraulic cylinder (2) is provided with an oil inlet and an oil outlet, the two groups of pressure maintaining devices are respectively arranged on the oil inlet and the oil outlet of the hydraulic cylinder (2), the bottom pressure maintaining device is arranged on the output port of the hydraulic pump (1) through the first oil delivery pipe (4), the right end of the second oil delivery pipe (5) is arranged on the top pressure maintaining device, the filtering device is arranged at the left end of the second oil delivery pipe (5), the left end of the filtering device is arranged on the cooling device, the left end of the cooling device is arranged on the oil tank (3), the hydraulic cylinder (2) is subjected to pressure maintaining through the pressure maintaining devices, filtering the hydraulic oil through a filtering device, and cooling the hydraulic oil through a cooling device;

the pressurizer includes connecting pipe (6), seal box (7), electric putter (8), extension spring (9), sealing plug (10) and velocity of flow sensor (11), and the bottom of seal box (7) is connected with the top of connecting pipe (6), and the top of electric putter (8) and extension spring (9) all is connected with the top in seal box (7), and the bottom of electric putter (8) and extension spring (9) all is connected with the top of sealing plug (10), and velocity of flow sensor (11) are installed in the inside of connecting pipe (6).

2. A hydraulic control system according to claim 1, wherein the filtering device comprises a filtering bin (12), a plurality of sets of filtering screens (13) and a plurality of sets of magnets (14), a chamber is arranged inside the filtering bin (12), the left end of the filtering bin (12) is mounted on the cooling device, the right end of the filtering bin (12) is connected with the left end of the second oil delivery pipe (5), the plurality of sets of filtering screens (13) are mounted inside the filtering bin (12), and the plurality of sets of magnets (14) are respectively connected with the side ends of the plurality of sets of filtering screens (13).

3. A hydraulic control system as claimed in claim 1, characterized in that the cooling device comprises a cooling box (15), a cooling pipe (16), a refrigerating box (17), a circulating pump (18), a conveying pipe (19) and a plurality of sets of exhaust fans (20), the left end of the cooling box (15) is connected with the right end of the oil tank (3), an exhaust port is arranged at the top of the side end of the cooling box (15), the cooling pipe (16) is positioned inside the cooling box (15), the left end of the cooling pipe (16) is communicated with the inside of the oil tank (3), the right end of the cooling pipe (16) is connected with the left end of the filtering bin (12), the bottom end of the refrigerating box (17) is connected with the top end of the cooling box (15), a feeding valve is arranged at the top end of the refrigerating box (17), a refrigerating plate is arranged inside the refrigerating box (17), the side end of the circulating pump (18) is connected with the right end of the refrigerating box (17), and the left end of the circulating pump (18) is provided with a water suction port, the bottom end of the circulating pump (18) is provided with a water discharge port, the water suction port of the circulating pump (18) is communicated with the inside of the refrigeration box (17), the bottom end of the conveying pipe (19) is connected with the bottom end in the cooling box (15), one end of the conveying pipe (19) is connected with the water discharge port of the circulating pump (18), the other end of the conveying pipe (19) is communicated with the inside of the refrigeration box (17), and a plurality of groups of exhaust fans (20) are all arranged on the conveying pipe (19).

4. A hydraulic control system according to claim 1, further comprising a plurality of sets of seal rings (21), the plurality of sets of seal rings (21) being respectively mounted in the connecting pipes (6) of the two sets of pressurizers.

5. A hydraulic control system according to claim 3, further comprising a transmission box (22), a driving motor (23) and a stirring shaft (24), wherein the bottom end of the transmission box (22) is connected with the top end of the refrigeration box (17), the side end of the transmission box (22) is provided with an input end, the bottom end of the transmission box (22) is provided with an output end, the driving motor (23) is installed at the side end of the transmission box (22), the side end of the driving motor (23) is connected with the input end of the transmission box (22), the top end of the stirring shaft (24) is connected with the output end of the transmission box (22), and the bottom end of the stirring shaft (24) extends into the refrigeration box (17) from the top end of the refrigeration box (17).

6. A hydraulic control system according to claim 3, further comprising a plurality of sets of fins (25), the plurality of sets of fins (25) being mounted to the surface of the drop tube (16).

7. A hydraulic control system as claimed in claim 3, characterised by further comprising a sight glass (26), the rear end of the sight glass (26) being connected to the front end of the refrigeration cassette (17).