CN111998582A

CN111998582A - Ice cutting device of tube ice maker

Info

Publication number: CN111998582A
Application number: CN202011019058.2A
Authority: CN
Inventors: 龚千; 杨红波
Original assignee: Guangzhou Icesource Refrigeration Equipment Co ltd
Current assignee: Guangzhou Icesource Refrigeration Equipment Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2020-11-27

Abstract

The invention discloses an ice cutting device of a tube ice maker, which comprises an outer barrel and an ice outlet arranged on one side of the outer barrel, wherein a rotatable turntable is arranged in the outer barrel; the center of the bottom of the turntable is connected with a main shaft, and the main shaft is driven by a first motor arranged outside the outer barrel; the rotary table is provided with a plurality of sawing mechanisms, each sawing mechanism comprises a sawing shaft which is rotatably arranged on the rotary table, one end of each sawing shaft is connected with a saw blade, and the other end of each sawing shaft is connected with an output shaft of a second motor fixed at the bottom of the rotary table. The first motor drives the main shaft to enable the saw blade arranged on the turntable to do revolution motion around the center of the turntable; meanwhile, a second motor arranged on the turntable drives the saw blade to rotate; the outer barrel of the tube ice machine is not attached when the tube ice is cut, and the tube ice machine is a mechanism independently; the pipe ice is not driven by gears, so that the phenomenon that metal dust pollutes the pipe ice due to gear abrasion is avoided; the transmission driving is carried out from the lower part of the turntable, ice falls from the upper part of the turntable without mutual interference, and the installation and maintenance are convenient.

Description

Ice cutting device of tube ice maker

Technical Field

The invention relates to the technical field of pipe ice production equipment, in particular to an ice cutting device of a pipe ice machine.

Background

A Tube ice machine (Tube ice machine) is one type of ice machine. The ice cubes produced by the method are named as hollow tubes; the ice making part of the tube ice machine is an evaporator, and the evaporator is internally composed of a plurality of vertical parallel steel tubes. The fluid director at the top of the evaporator evenly sprinkles water into each steel pipe in a spiral manner. The refrigerant flows in the outer space of the steel pipe and exchanges heat with the water in the steel pipe, and the water in the steel pipe is gradually cooled to form ice. When the thickness of the tube ice reaches the desired value, the water automatically stops flowing. The hot refrigerant gas enters the evaporator to melt and shed the tube ice. When the pipe ice falls, the pipe ice is cut into sections by the ice cutting device.

The first type of ice cutting device in the market is to cut ice by impacting tube ice through a rotating cutter, such as the ice cutting device disclosed in patent publication No. CN211012024U, but the tube ice produced by the method is irregular and has more chips; the second is by means of sawing, such as the ice cutting device shown in patent publication No. CN102183111A, but the sawing mechanism is attached to the outer barrel of the ice tube maker, and cannot be a separate mechanism, which is large in size and inconvenient to install and maintain; in addition, the cutting feed motion of the ice cutting device is realized by driving a large gear on the outer ring of a turntable by a small gear, and metal dust generated by gear abrasion is directly mixed into a product, so that the ice cutting device is not clean enough; and the ice cutting device cuts the feed motion by running through the inside axle of pipe ice machine bucket, and power spreads into from the top, drives the carousel rotation of axle lower extreme, and the transmission shaft size is great, and the preparation is maintained more difficultly. Therefore, the structure of the existing ice cutting device is in need of improvement.

Disclosure of Invention

Accordingly, the present invention is directed to an ice cutting device for a tube ice maker, which can solve at least one of the above problems to some extent.

The technical scheme of the invention is realized as follows:

an ice cutting device of a tube ice machine comprises an outer barrel and an ice outlet arranged on one side of the outer barrel, wherein a rotatable turntable is arranged in the outer barrel; the center of the bottom of the turntable is connected with a main shaft, and the main shaft is driven by a first motor arranged outside the outer barrel; the rotary table is provided with a plurality of sawing mechanisms, each sawing mechanism comprises a sawing shaft which is rotatably arranged on the rotary table, one end of each sawing shaft is connected with a saw blade, and the other end of each sawing shaft is connected with an output shaft of a second motor fixed at the bottom of the rotary table.

As a further alternative of the ice cutting device of the tube ice machine, a supporting seat extends inwards from the side wall of the outer barrel, the supporting seat is positioned below the turntable, a cavity is arranged inside the supporting seat, and the spindle extends into the cavity and is in sealed rotatable connection with the supporting seat; the first motor drives the main shaft in the cavity through a transmission belt or a transmission chain.

As a further alternative of the ice cutting device of the tube ice maker, the main shaft is hollow, the bottom end of the main shaft is connected with an electric slip ring, the second motor is connected with a cable, the cable enters the main shaft and is connected with the upper end of the electric slip ring, and the lower end of the electric slip ring is connected with a power line.

As a further alternative of the ice cutting device of the tube ice machine, an ice falling plate is arranged between the saw blade and the turntable and is fixed on the turntable through a support rod; an ice discharging opening is formed in the ice falling plate corresponding to the saw blade; the ice falling plate is characterized in that an ice falling port of the ice falling plate is connected with an inclined plate used for transferring the pipe ice from the ice falling port to the rotary plate; the bottom of the turntable is provided with a slideway capable of enabling the pipe ice to slide downwards; an inclined sliding plate is arranged between the slide way and the supporting seat, is fixed on the outer barrel and is obliquely arranged to guide the pipe ice to the ice outlet; and a plurality of through holes are formed in the oblique sliding plate.

As a further alternative of the ice cutting device of the tube ice maker, the ice outlet is connected with an ice outlet channel, a separating sieve which is obliquely arranged is arranged in the ice outlet channel, and the separating sieve comprises a plurality of light rods which are arranged at intervals.

As a further alternative of the ice cutting device of the tube ice maker, a protective cover covers the second motor, the protective cover is fixed on the rotary table, and a sieve plate is arranged at the bottom of the protective cover.

As a further alternative of the ice cutting device of the tube ice machine, a water tank is connected below the outer barrel.

As a further alternative of the ice cutting device of the tube ice machine, a base is arranged on the turntable, and the sawing shaft is rotatably connected with the base; a bearing group is arranged between the sawing shaft and the base; and the sawing shaft and the base are connected by adopting non-contact sealed labyrinth seals above and below the bearing group.

As a further alternative of the ice cutting device of the tube ice maker, the bearing set comprises a first angular contact ball bearing, a second angular contact ball bearing and a non-contact double-sided sealed deep groove ball bearing which are arranged from top to bottom; the first angular contact ball bearing and the second angular contact ball bearing are installed oppositely, and spacer bushes are arranged between the first angular contact ball bearing, the second angular contact ball bearing and the deep groove ball bearing.

As a further alternative of the ice cutting device of the tube ice machine, the saw blade is hermetically connected to the upper end of the saw cutting shaft through a connecting plate, a first shaft shoulder and a second shaft shoulder are arranged on the upper portion of the saw cutting shaft from bottom to top, a shoulder sleeve for pressing and fixing a bearing set from top to bottom is abutted to the end face of the first shaft shoulder, and the outer side wall of the shoulder sleeve protrudes out of the outer side face of the first shaft shoulder; the upper end of the base is hermetically connected with a gland, and a transition cover is arranged between the shoulder sleeve and the gland; the shoulder sleeve and the transition cover form labyrinth seal connection, the transition cover and the sawing shaft form labyrinth seal connection, and the gland and the sawing shaft form labyrinth seal connection; a labyrinth seal connection is formed between the upper end surface of the gland and the lower end surface of the connecting plate, and a V-shaped sealing ring is arranged between the gland and the connecting plate; a third shaft shoulder used for supporting the bearing group from bottom to top is arranged on the inner wall of the base, and a sealing sleeve used for pressing and fixing the bearing group from bottom to top is sleeved on the lower portion of the sawing shaft; a labyrinth seal connection is formed between the seal sleeve and a third shaft shoulder of the base; a locking nut in threaded connection with the sawing shaft is arranged below the sealing sleeve; and a dustproof cover connected to the base is arranged below the locking nut.

The invention has the following beneficial effects: the first motor drives the main shaft to enable the turntable to rotate, and the saw blade arranged on the turntable revolves around the center of the turntable; meanwhile, the second motor arranged on the turntable drives the saw blade to rotate; the outer barrel of the tube ice machine is not attached when the tube ice is cut, and the tube ice machine is a mechanism independently; the pipe ice is not driven by gears, so that the phenomenon that metal dust pollutes the pipe ice due to gear abrasion is avoided; the transmission driving is carried out from the lower part of the turntable, ice falls from the upper part of the turntable without mutual interference, and the installation and maintenance are convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of a section of an ice cutting device of a tube ice maker according to the present invention;

fig. 2 is a schematic structural diagram of an ice cutting device of a tube ice maker according to the present invention;

fig. 3 is a cross-sectional side view of an ice cutting device of a tube ice maker according to the present invention;

fig. 4 is a top view of an ice cutting device of a tube ice maker according to the present invention;

FIG. 5 is a schematic view of the ice chute and the saw blade in cooperation;

FIG. 6 is an enlarged view of A in FIG. 2;

FIG. 7 is a cross-sectional schematic view of the saw mechanism;

FIG. 8 is a view showing a connection structure of the sawing shaft and the base;

fig. 9 is an enlarged view of B in fig. 8.

In the figure: 1. an outer tub; 11. a supporting seat; 111. a cavity; 12. an inclined slide plate; 13. an ice outlet; 14. an ice outlet channel; 15. separating and screening; 2. a turntable; 21. a main shaft; 22. a first motor; 23. an electrical slip ring; 24. a slideway; 3. a sawing mechanism; 31. sawing the shaft; 311. a first shoulder; 312. a second shoulder; 313. a shoulder sleeve; 314. sealing sleeves; 315. locking the nut; 32. a saw blade; 321. a connecting plate; 33. a second motor; 331. a protective cover; 332. a sieve plate; 34. a base; 341. a gland; 342. a transition cover; 343. a V-shaped sealing ring; 344. a dust cover; 345. a third shoulder; 35. a bearing set; 351. a first angular contact ball bearing; 352. a second angular contact ball bearing; 353. a deep groove ball bearing; 354. a spacer sleeve; 4. an ice falling plate; 41. a support bar; 42. a ice discharging opening; 43. a sloping plate; 44. an ice guide plate; 5. a water tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 9, an ice cutting device of a tube ice maker is shown, which comprises an outer barrel 1 and an ice outlet 13 arranged at one side of the outer barrel 1, wherein a rotatable turntable 2 is arranged in the outer barrel 1; the center of the bottom of the turntable 2 is connected with a main shaft 21, and the main shaft 21 is driven by a first motor 22 arranged outside the outer barrel 1; the rotary table 2 is provided with a plurality of sawing mechanisms 3, each sawing mechanism 3 comprises a sawing shaft 31 rotatably arranged on the rotary table 2, one end of each sawing shaft 31 is connected with a saw blade 32, and the other end of each sawing shaft is connected with an output shaft of a second motor 33 fixed at the bottom of the rotary table 2. Wherein, the output shaft of the second motor 33 is connected with the sawing shaft 31 through a flat key.

Thus, the outer barrel 1 is used for receiving an ice making part of the tube ice machine, and tube ice enters the outer barrel 1 from top to bottom; a first motor 22 drives a main shaft 21 to rotate the turntable 2, so that a saw blade 32 arranged on the turntable 2 performs revolution motion around the center of the turntable 2; meanwhile, a second motor 33 arranged on the turntable 2 drives a saw blade 32 to rotate, so that tube ice is cut; the outer barrel 1 of the tube ice machine is not attached during cutting tube ice, and is a mechanism independently; the pipe ice is not driven by gears, so that the phenomenon that metal dust pollutes the pipe ice due to gear abrasion is avoided; the transmission driving is carried out from the lower part of the turntable 2, and the ice falling is carried out from the upper part of the turntable 2 without mutual interference, thereby being convenient for installation and maintenance.

In the above solution, in order to provide positioning and supporting for the spindle 21, referring to fig. 1, a supporting seat 11 extends inward from a side wall of the outer tub 1, the supporting seat 11 is located below the turntable 2, a cavity 111 is disposed inside the supporting seat 11, and the spindle 21 extends into the cavity 111 and is rotatably connected to the supporting seat 11 in a sealed manner; the first motor 22 drives the main shaft 21 in the cavity 111 through a belt or a chain. In this way, the transmission mechanism of the electromechanical part of the spindle 21 is separated in the cavity 111 and is not in contact with ice and water, so as to avoid short circuit of the circuit; in addition, for convenience of electrifying the second motor 33, referring to fig. 1 and 7, the main shaft 21 is hollow, the bottom end of the main shaft 21 is connected with the electric slip ring 23, the second motor 33 is connected with a cable wire, the cable wire enters the main shaft 21 and is connected with the upper end of the electric slip ring 23, and the lower end of the electric slip ring 23 is connected with a power wire. Referring to fig. 7, a hole is opened in a side wall of the main shaft 21, and the cable may enter the main shaft 21 through the hole. In addition, in order to avoid the water and ice from affecting the second motor 33, referring to fig. 2 and 6, the second motor 33 is covered by a protective cover 331, the protective cover 331 is fixed on the turntable 2, and the protective cover 331 can reduce the contact of the second motor 33 with the water and ice; in practical applications, water may inevitably enter the shield 331, and referring to fig. 6, a sieve plate 332 may be disposed at the bottom of the shield 331 to prevent the water from staying and accumulating inside the shield 331.

In the above solution, specifically, referring to fig. 1, fig. 2, fig. 3, fig. 5 and fig. 6, an ice falling plate 4 is disposed between the saw blade 32 and the turntable 2, and the ice falling plate 4 is fixed on the turntable 2 through a support rod 41; the ice falling plate 4 is provided with an ice falling opening 42 corresponding to the saw blade 32; the ice falling port 42 of the ice falling plate 4 is connected with an inclined plate 43 which is used for transferring the pipe ice from the ice falling port 42 to the rotary disc 2; the bottom of the turntable 2 is provided with a slideway 24 which can enable the pipe ice to slide downwards; an inclined sliding plate 12 is arranged between the slide way 24 and the supporting seat 11, the inclined sliding plate 12 is fixed on the outer barrel 1 and is obliquely arranged to guide the pipe ice to the ice outlet 13; the inclined sliding plate 12 is provided with a plurality of through holes. Specifically, the tube ice falls onto the ice falling plate 4 from top to bottom, a certain distance is formed between the ice falling plate 4 and the saw blade 32, the distance is the cutting length of the tube ice, and the distance between the ice falling plate 4 and the saw blade 32 can be adjusted by replacing the support rod 41; the first motor 22 and the second motor 33 respectively drive the saw blade 32 to revolve and rotate, the saw blade 32 cuts the tube ice into sections, the cut tube ice enters the ice discharge opening 42 on the ice falling plate 4 and then slides down onto the turntable 2 along the inclined plate 43, an opening for the tube ice to pass through is formed in the turntable 2, the tube ice enters the slideway 24 through the opening and slides down onto the inclined sliding plate 12 along the slideway 24, then slides from the inclined sliding plate 12 to the ice discharge opening 13, and water flows down from a through hole in the inclined sliding plate 12; the inclined plate 43, the slide way 24 and the inclined slide plate 12 are transition parts for avoiding severe collision of the pipe ice in the process of sliding to the ice outlet 13; of course, the second motor 33 needs to be avoided when the slide way 24 is arranged, so that the space is reasonably utilized. It should be noted that the inclined plate 43 and the slide 24 rotate with the main shaft 21, and the inclined slide plate 12 is fixed to the outer tub 1 without rotation.

In the above-described embodiments, since water and crushed ice are inevitably generated in the production of the tube ice, the conventional ice cutting device separates only water, but cannot separate crushed ice, by providing holes in the plate member for separation. Referring to fig. 1 and 2, the ice outlet 13 is connected to an ice outlet channel 14, a separating sieve 15 is obliquely arranged in the ice outlet channel 14, and the separating sieve 15 includes a plurality of light bars arranged at intervals. In this manner, the separating screen 15 can simultaneously separate water and crushed ice. In addition, referring to fig. 2, a water tank 5 is connected to a lower portion of the tub 1; in this way, the water separated from the inclined slide plate 12 and the water and crushed ice separated from the separating screen 15 fall into the water tank 5 to be reused. It should be noted that the supporting seat 11 does not completely block the inner passage of the outer tub 1, so that the water separated from the inclined sliding plate 12 can enter the water tank 5.

In the above embodiment, after falling onto the ice falling plate 4, the tube ice produced by the ice making part of the tube ice machine is cut by the saw blade 32, and meanwhile, because the saw blade 32 revolves, the upper surface of the saw blade 32 moves along the lower surface of the tube ice, and after the saw blade 32 is separated from the tube ice, the tube ice falls onto the ice falling plate 4 again, because a certain distance is provided between the saw blade 32 and the ice falling plate 4, in order to avoid the tube ice falling onto the ice falling plate 4 and causing broken ice due to violent collision, referring to fig. 4 and 5, an ice guide plate 44 is provided on the ice falling plate 4, the ice guide plate 44 is located behind the moving direction of the saw blade 32, and an inclined surface for guiding the ice is provided on the ice guide plate 44, so that the tube ice can slide onto the ice falling plate 4 along the inclined surface, thereby avoiding violent collision.

In the above scheme, a maintenance window (not marked in the figure) can be arranged on the outer barrel 1, and the saw cutting mechanism 3 can be integrally taken out through the maintenance window without integrally disassembling the ice cutting device after the equipment is fixedly installed, so that the saw blade 32 can be conveniently replaced and maintained.

In some embodiments, when cutting the ice, the water flow is turbulent and splashed, and the air humidity is high, so that the saw shaft 31 needs to be sufficiently protected; in addition, in order to ensure that the pipe ice cuts are flush, the sawing shaft 31 needs to maintain a high rotation speed, so that the sawing shaft 31 needs to reduce heat generation to avoid shortened service life; referring to fig. 7, 8 and 9, a base 34 is provided on the turntable 2, and the sawing shaft 31 is rotatably connected to the base 34; a bearing set 35 is arranged between the sawing shaft 31 and the base 34; the sawing shaft 31 and the base 34 are connected by a non-contact type sealed labyrinth seal above and below the bearing set 35. The labyrinth seal connection of the non-contact seal can ensure the sealing performance and simultaneously avoid friction heating of the sawing shaft 31 and the base 34; on the one hand, heating can be reduced to ensure the service life, and on the other hand, the situation that the pipe ice is polluted by debris generated by abrasion can be avoided.

In the above embodiment, referring to fig. 8, the bearing set 35 includes a first angular contact ball bearing 351, a second angular contact ball bearing 352, and a non-contact double-sided sealed deep groove ball bearing 353 arranged from top to bottom; the first angular contact ball bearing 351 and the second angular contact ball bearing 352 are oppositely arranged, and spacer bushes 354 are arranged between every two of the first angular contact ball bearing 351, the second angular contact ball bearing 352 and the deep groove ball bearing 353. The first angular contact ball bearing 351 and the second angular contact ball bearing 352 are arranged in a mode capable of bearing axial force excellently, the deep groove ball bearing 353 can bear radial load and overturning moment, the three bearings are combined to maintain rotation precision, and are separated through the spacer sleeve 354, so that lubricating grease can be stored conveniently, enough lubricating grease allowance space can be reserved conveniently, heating caused by stirring of the lubricating grease is reduced, the saw-cut shaft 31 can bear higher rotating speed, the rotation precision is maintained, and higher overturning moment is borne; so that the sawing shaft 31 can withstand rotating speeds below 5000 r/min.

In the above embodiment, with reference to fig. 8, regarding connection between the lower portion of the sawing shaft 31 and the base 34, a third shaft shoulder 345 for supporting the bearing assembly 35 from bottom to top is disposed on an inner wall of the base 34, a sealing sleeve 314 for fixing the bearing assembly 35 from bottom to top is sleeved on the lower portion of the sawing shaft 31, wherein the third shaft shoulder 345 supports an outer ring of the bearing assembly 35, the sealing sleeve 314 supports an inner ring of the bearing assembly 35, the sealing sleeve 314 forms a contact seal with the sawing shaft 31 through a sealing ring, and the sealing sleeve 314 rotates with the sawing shaft 31; the outer side wall of the sealing sleeve 314 forms a labyrinth seal connection with the inner side wall of the third shaft shoulder 345; in order to avoid the sealing sleeve 314 from falling out, a locking nut 315 which is in threaded connection with the sawing shaft 31 is arranged below the sealing sleeve 314; a dust cover 344 connected to the base 34 is arranged below the locking nut 315, and the dust cover 344 has a certain waterproof effect in addition to dust prevention.

With regard to the connection between the upper portion of the sawing shaft 31 and the base 34, referring to fig. 8 and 9 again, the saw blade 32 is hermetically connected to the upper end of the sawing shaft 31 through a connecting plate 321, the upper portion of the sawing shaft 31 is provided with a first shaft shoulder 311 and a second shaft shoulder 312 from bottom to top, the end surface of the first shaft shoulder 311 abuts against a shoulder sleeve 313 for pressing and fixing a bearing set from top to bottom, and the outer side wall of the shoulder sleeve 313 protrudes out of the outer side surface of the first shaft shoulder 311; a gland 341 is hermetically connected to the upper end of the base 34, and a transition cover 342 is arranged between the shoulder sleeve 313 and the gland 341; wherein the gland 341 compresses the outer ring of the bearing set through the transition cover 342, and the end of the first shoulder 311 compresses the inner ring of the bearing set through the shoulder sleeve 313; the shoulder sleeve 313 forms a contact seal with the sawing shaft 31, the shoulder sleeve 313 rotates along with the sawing shaft 31, and the outer side surface and the upper end surface of the shoulder sleeve 313 form a labyrinth seal connection with the transition cover 342; the inner side surface of the transition cover 342 and the outer side surface of the first shaft shoulder 311 form a labyrinth seal connection, and the upper end surface of the transition cover 342 and the end surface of the second shaft shoulder 312 form a labyrinth seal connection; the inner side surface of the gland 341 and the outer side surface of the second shoulder 312 form a labyrinth seal connection; a labyrinth seal connection is formed between the upper end surface of the gland 341 and the lower end surface of the connecting plate 321, an annular groove is formed between the gland 341 and the connecting plate 321, and a V-shaped sealing ring 343 is arranged in the annular groove. It should be noted that the upper part of the sawing shaft 31 encounters more water current than the lower part, so that the upper part of the sawing shaft 31 is provided with more than three labyrinth joints and is provided with a V-shaped sealing ring for further sealing, so as to ensure good sealing performance.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An ice cutting device of a tube ice machine comprises an outer barrel and an ice outlet arranged on one side of the outer barrel, and is characterized in that a rotatable turntable is arranged in the outer barrel; the center of the bottom of the turntable is connected with a main shaft, and the main shaft is driven by a first motor arranged outside the outer barrel; the rotary table is provided with a plurality of sawing mechanisms, each sawing mechanism comprises a sawing shaft which is rotatably arranged on the rotary table, one end of each sawing shaft is connected with a saw blade, and the other end of each sawing shaft is connected with an output shaft of a second motor fixed at the bottom of the rotary table.

2. The ice cutting device of the tube ice maker as claimed in claim 1, wherein a supporting seat extends from a side wall of the outer barrel, the supporting seat is located below the turntable, a cavity is formed in the supporting seat, and the main shaft extends into the cavity and is rotatably connected with the supporting seat in a sealing manner; the first motor drives the main shaft in the cavity through a transmission belt or a transmission chain.

3. The ice cutting device of the tube ice maker as claimed in claim 2, wherein the main shaft is hollow, an electric slip ring is connected to the bottom end of the main shaft, the second motor is connected with a cable, the cable enters the inside of the main shaft and is connected with the upper end of the electric slip ring, and the lower end of the electric slip ring is connected with a power line.

4. The ice cutting device of the tube ice machine as claimed in claim 3, wherein an ice falling plate is arranged between the saw blade and the turntable, and the ice falling plate is fixed on the turntable through a support rod; an ice discharging opening is formed in the ice falling plate corresponding to the saw blade; the ice falling plate is characterized in that an ice falling port of the ice falling plate is connected with an inclined plate used for transferring the pipe ice from the ice falling port to the rotary plate; the bottom of the turntable is provided with a slideway capable of enabling the pipe ice to slide downwards; an inclined sliding plate is arranged between the slide way and the supporting seat, is fixed on the outer barrel and is obliquely arranged to guide the pipe ice to the ice outlet; and a plurality of through holes are formed in the oblique sliding plate.

5. The ice cutting device of the tube ice maker as claimed in claim 4, wherein the ice outlet is connected to an ice channel, an inclined separating screen is disposed in the ice channel, and the separating screen includes a plurality of light bars arranged at intervals.

6. An ice cutting device of a tube ice maker according to claim 4 or 5, wherein the second motor is covered with a shield, the shield is fixed on the rotary disc, and a screen plate is arranged at the bottom of the shield.

7. The ice cutting device of the tube ice maker as claimed in claim 6, wherein a water tank is connected to a lower portion of the outer tub.

8. The ice cutting device of the tube ice maker as claimed in claim 1, wherein a base is disposed on the turntable, and the saw shaft is rotatably connected with the base; a bearing group is arranged between the sawing shaft and the base; and the sawing shaft and the base are connected by adopting non-contact sealed labyrinth seals above and below the bearing group.

9. The ice cutting device of the tube ice maker as claimed in claim 8, wherein the bearing set comprises a first angular contact ball bearing, a second angular contact ball bearing and a non-contact double-sided sealed deep groove ball bearing which are arranged from top to bottom; the first angular contact ball bearing and the second angular contact ball bearing are installed oppositely, and spacer bushes are arranged between the first angular contact ball bearing, the second angular contact ball bearing and the deep groove ball bearing.

10. The ice cutting device of the tube ice maker as claimed in claim 9, wherein the saw blade is connected to the upper end of the saw shaft in a sealing manner through a connecting plate, a first shaft shoulder and a second shaft shoulder are arranged on the upper portion of the saw shaft from bottom to top, a shoulder sleeve for pressing and fixing a bearing set from top to bottom is abutted to the end face of the first shaft shoulder, and the outer side wall of the shoulder sleeve protrudes out of the side face of the first shaft shoulder; the upper end of the base is hermetically connected with a gland, and a transition cover is arranged between the shoulder sleeve and the gland; the shoulder sleeve and the transition cover form labyrinth seal connection, the transition cover and the sawing shaft form labyrinth seal connection, and the gland and the sawing shaft form labyrinth seal connection; a labyrinth seal connection is formed between the upper end surface of the gland and the lower end surface of the connecting plate, and a V-shaped sealing ring is arranged between the gland and the connecting plate; a third shaft shoulder used for supporting the bearing group from bottom to top is arranged on the inner wall of the base, and a sealing sleeve used for pressing and fixing the bearing group from bottom to top is sleeved on the lower portion of the sawing shaft; a labyrinth seal connection is formed between the seal sleeve and a third shaft shoulder of the base; a locking nut in threaded connection with the sawing shaft is arranged below the sealing sleeve; and a dustproof cover connected to the base is arranged below the locking nut.