CN213166299U

CN213166299U - Cooling device of granulator

Info

Publication number: CN213166299U
Application number: CN202021430194.6U
Authority: CN
Inventors: 周正清; 朱金平; 徐建明; 范维明
Original assignee: Jiangsu Dayi Material Technology Co ltd
Current assignee: Jiangsu Dayi Material Technology Co ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-05-11
Anticipated expiration: 2030-07-20

Abstract

The utility model relates to a cooling device, in particular to a cooling device of a granulator, which comprises a shell, a liquid nitrogen supply mechanism, a liquid nitrogen recovery mechanism and a material particle collection mechanism; the shell comprises an outer wall and an inner wall, a cavity is sealed between the outer wall and the inner wall, a liquid inlet pipe is arranged on one side of the cavity and connected with a liquid nitrogen supply mechanism, and a liquid outlet pipe is arranged on the other side of the cavity and connected with a nitrogen recovery mechanism; one end of the shell is provided with a first variable frequency motor; the first variable frequency motor is provided with a fan; a filter screen is arranged on the side of the fan; the other end of the shell is provided with a second variable frequency motor; the second variable frequency motor is provided with a rotating shaft which penetrates through the shell, and the rotating shaft is connected with a helical blade; a feed hopper is communicated in the shell; the bottom of the shell is communicated with a discharge pipe, and a discharge hole of the discharge pipe is provided with a material particle collecting mechanism; the utility model discloses can effectively reduce material grain temperature, prevent that the material grain from gathering and gluing glutinous, control manufacturing cost, the pollution of the production that significantly reduces to the environment.

Description

Cooling device of granulator

Technical Field

The utility model relates to a cooling device, especially a cooling device of granulator.

Background

The plastic granulator is equipment which changes the physical properties of plastics by adopting the processes of high-temperature melting, plasticizing and extruding according to different purposes, so as to plasticize and form the plastics and prepare plastic raw materials into granular products suitable for secondary processing. The plastic granulator available in the market at present has multiple model structures, and the heating, mixing and grain cutting of granulation process can all be accomplished in equipment automatically, but in current granulator, though be equipped with cooling system, the material grain of discharging from its discharge gate has higher temperature, leads to falling into the granule bonding of ground material grain pond mechanism together, still need the breakage once more during the use, increases work load, and the smell that has the plastics of certain temperature and gives out also influences ambient air quality, causes the pollution to the environment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cooling device of granulator to solve the problem that proposes among the above-mentioned background art.

The utility model adopts the technical proposal that:

a cooling device of a granulator comprises a shell, a liquid nitrogen supply mechanism, a liquid nitrogen recovery mechanism and a material particle collection mechanism; the shell comprises an outer wall and an inner wall, a cavity is sealed between the outer wall and the inner wall, a liquid inlet pipe is arranged on one side of the cavity and connected with a liquid nitrogen supply mechanism, and a liquid outlet pipe is arranged on the other side of the cavity and connected with a nitrogen recovery mechanism;

one end of the shell is provided with a first variable frequency motor; the first variable frequency motor is provided with a fan; a filter screen is arranged on the side of the fan; the other end of the shell is provided with a second variable frequency motor; the second variable frequency motor is provided with a rotating shaft which penetrates through the shell, and the rotating shaft is connected with a helical blade; a feed hopper is communicated in the shell; the bottom of casing intercommunication has the discharging pipe, and the discharge gate of discharging pipe is equipped with material grain and collects the mechanism.

As a further aspect of the present invention: the liquid nitrogen supply mechanism comprises a liquid nitrogen tank and a liquid conveying pipe connected with the liquid nitrogen tank and connected with a liquid inlet pipe, and the liquid conveying pipe is provided with a nitrogen outlet valve, a liquid nitrogen outlet valve and a safety valve.

As a further aspect of the present invention: the nitrogen recovery mechanism comprises a gas storage tank, an exhaust pipe connected with the gas storage tank and an electromagnetic valve arranged on the exhaust pipe; one end of the exhaust pipe is connected with the liquid outlet pipe; the nitrogen recovery mechanism further comprises a bypass exhaust pipe, the exhaust pipe is connected with the liquid outlet pipe, and a bypass electromagnetic valve is installed on the bypass exhaust pipe.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model adopts the fan to act at the feed inlet, blows and scatters the material particles, reduces the temperature of the material particles, effectively prevents the material particles from gathering and sticking, takes away the moisture generated by cooling, and dries the material particles; the helical blades are adopted to continuously turn the material particles in the cooling process, so that the adhesion among the material particles is effectively prevented; the pellets cannot be soaked with liquid nitrogen because soaking pellets with liquid nitrogen can cause the pellets to be too brittle, affecting pellet performance. The utility model discloses a surrounding type's casing cooling makes casing and the abundant contact of material grain, makes the quick even cooling of material grain, prevents that the cooling inequality from causing the material grain size nonconformity, guarantees the quality of material grain.

The utility model discloses a recoverable cooling of liquid nitrogen, the liquid nitrogen that the liquid nitrogen jar came out is gasifying fast at the in-process through the cavity, cools off the aggregate to retrieve the cyclic utilization to the nitrogen gas of vaporization. The method not only greatly reduces the adverse effect of liquid nitrogen soaking material particles on performance, but also has better cooling effect and higher cooling speed than the traditional cooling methods of water cooling, air cooling, combination of water cooling and air cooling and the like, can effectively reduce the space occupied by equipment and effectively control the production cost, has good and stable quality of the material particles, and most importantly, greatly reduces the generation and discharge of sewage and waste gas, thereby greatly reducing the pollution of production to the environment.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is a side view of an embodiment of the present invention;

fig. 3 is a top view of an embodiment of the present invention;

number designation 1 shell in the figure; 101 outer wall of the shell; 102 an inner wall of the housing; 103 a feed inlet; 104, a discharge hole; 105 a first variable frequency motor; 106 a second variable frequency motor; 107 rotating shafts; 108 a helical blade; 109 a fan; a 110 mesh screen; 111 a liquid inlet pipe; 112 liquid outlet pipes; 2 liquid nitrogen supply mechanism; 201 a liquid nitrogen tank; 202 infusion tubes; 203 an outlet valve; 204 an outlet valve; 205 a safety valve; 3 a nitrogen recovery mechanism; 301 air storage tank; 302 an exhaust pipe; 303 electromagnetic valve; 304 bypass the exhaust pipe; 305 bypassing the exhaust valve; 4 a material particle collecting mechanism.

Detailed Description

As shown in the drawings, in the preferred embodiment of the present invention, a cooling device for a pelletizer includes a housing 1, a liquid nitrogen supply mechanism 2, a nitrogen recovery mechanism 3 and a pellet collection mechanism 4; the shell 1 comprises an outer wall 101 and an inner wall 102, a cavity is sealed between the outer wall 101 and the inner wall 102, a liquid inlet pipe 111 is arranged on one side of the cavity and connected with a liquid nitrogen supply mechanism 2, and a liquid outlet pipe 112 is arranged on the other side of the cavity and connected with a nitrogen recovery mechanism 3; the discharge port 104 of the housing 1 is connected to the pellet collecting mechanism 4.

The outer wall 101 of the shell 1 is coated with a vacuum insulation plate, so that heat exchange between the inner layer and the outside is reduced to the maximum extent, and vaporization loss of liquid nitrogen is guaranteed.

A first variable frequency motor 105 is arranged at one end of the shell 1, the first variable frequency motor 105 is electrically connected with an external power supply, and the first variable frequency motor 105 is provided with a fan 109; a filter screen 110 is arranged on the side edge of the fan 109; the other end of the shell 1 is provided with a second variable frequency motor 106, the second variable frequency motor 106 is electrically connected with an external power supply, the second variable frequency motor 106 is provided with a rotating shaft 107 penetrating in the shell 1, and the rotating shaft 107 is connected with a helical blade 108; a feed hopper 103 is communicated with the shell 1; the bottom of the shell 1 is communicated with a discharge pipe 104, and a discharge hole of the discharge pipe 104 is provided with a material particle collecting mechanism 4.

The liquid nitrogen supply mechanism 2 comprises a liquid nitrogen tank 201 for storing liquid nitrogen, and a liquid conveying pipe 202 connected with the liquid nitrogen tank 201 and connected with the liquid inlet pipe 111, wherein a nitrogen outlet valve 203, a liquid nitrogen outlet valve 204 and a safety valve 205 are arranged on the liquid nitrogen tank 201.

The liquid nitrogen tank 201 comprises a liquid nitrogen containing inner container and an outer wall, a gap between the inner container and the outer wall is vacuumized and insulated, and the wall surface of the inner container is coated with multiple layers of radiation-proof aluminum foils and activated carbon, so that the inner container and external heat exchange are reduced to the maximum extent, and the vaporization loss of liquid nitrogen is guaranteed.

The infusion tube 202 adopts a vacuum heat insulation hose. The vacuum heat insulation hose has a good heat insulation effect, so that the loss of liquid nitrogen caused by vaporization in the transmission process is ensured.

The nitrogen recovery mechanism 3 comprises a gas storage tank 301, an exhaust pipe 302 connected with the gas storage tank 301 and an electromagnetic valve 303 arranged on the exhaust pipe 302; one end of the exhaust pipe 302 is connected with the liquid outlet pipe 112; and the bypass exhaust pipe 302 is connected with the liquid outlet pipe 112, and a bypass electromagnetic valve 305 is installed on the bypass exhaust pipe 304.

The exhaust pipe 302 is a bellows.

The utility model discloses a theory of operation is: putting the cut material particles into a feed hopper 103, and starting a first variable frequency motor 105, a second variable frequency motor 106, a liquid nitrogen supply mechanism 2 and a nitrogen recovery mechanism 3; starting a first variable frequency motor 105 to drive a fan 109 to operate; the filter screen 110 at the side of the fan 109 prevents the particles from splashing to the fan 108; a second variable frequency motor 106 is started to be connected with a rotating shaft 107 to drive a helical blade 108 to rotate, the helical blade 108 turns over the material particles to prevent the material particles from being adhered, and the helical blade 108 continuously pushes the material particles to move rightwards; the pellets move to the discharge port 114 and then enter a pellet collection mechanism; liquid nitrogen provided by a liquid nitrogen tank 201 enters the cavity from the liquid inlet pipe 111 through a liquid conveying pipe 202, and air flow provided by a fan 109 pushes cold air to pass through the granules for heat exchange and vaporization, so that nitrogen enters the gas storage tank 301 from the liquid outlet pipe 112 for recovery. In order to ensure the purity of the recovered nitrogen, the nitrogen at the outlet of the liquid outlet pipe 112 is divided into two paths, one path is directly discharged into the air through a bypass exhaust pipe 304 and is controlled by a bypass electromagnetic valve 305; the other way to the air storage tank is controlled by a solenoid valve 303, when the temperature of the shell is reduced to a certain degree, the solenoid valve 303 is closed, a bypass solenoid valve 305 is opened, and before the temperature, the solenoid valve 303 is opened, and the bypass solenoid valve 305 is closed.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A cooling device of a granulator comprises a shell (1), a liquid nitrogen supply mechanism (2), a nitrogen recovery mechanism (3) and a granule collection mechanism (4); the device is characterized in that the shell (1) comprises an outer wall (101) and an inner wall (102), a cavity is sealed between the outer wall (101) and the inner wall (102), a liquid inlet pipe (111) is arranged on one side of the cavity and connected with a liquid nitrogen supply mechanism (2), and a liquid outlet pipe (112) is arranged on the other side of the cavity and connected with a nitrogen recovery mechanism (3);

one end of the shell (1) is provided with a first variable frequency motor (105); the first variable frequency motor (105) is provided with a fan (109), and a filter screen (110) is arranged on the side edge of the fan (109); the other end of the shell (1) is provided with a second variable frequency motor (106), the second variable frequency motor (106) is electrically connected with an external power supply, the second variable frequency motor (106) is provided with a rotating shaft (107) penetrating through the shell (1), and the rotating shaft (107) is connected with a helical blade (108); a feed hopper (103) is communicated with the inside of the shell (1); the bottom of the shell (1) is communicated with a discharge pipe (104), and a discharge hole of the discharge pipe (104) is provided with a material particle collecting mechanism (4).

2. The cooling device of the granulator according to claim 1, wherein the liquid nitrogen supply mechanism (2) comprises a liquid nitrogen tank (201), and a liquid conveying pipe (202) connected with the liquid nitrogen tank (201) is connected with the liquid inlet pipe (111), and the liquid nitrogen tank (201) is provided with a nitrogen outlet valve (203), a liquid nitrogen outlet valve (204) and a safety valve (205).

3. The cooling device of the granulator according to claim 1, wherein the nitrogen recovery mechanism (3) comprises an air storage tank (301), an exhaust pipe (302) connected with the air storage tank (301), and an electromagnetic valve (303) arranged on the exhaust pipe (302); one end of the exhaust pipe (302) is connected with the liquid outlet pipe (112); the nitrogen recovery mechanism (3) further comprises a bypass exhaust pipe (304), the exhaust pipe (302) is connected with the liquid outlet pipe (112), and a bypass electromagnetic valve (305) is installed on the bypass exhaust pipe (304).

4. A cooling device of a granulator according to claim 1, characterized in that the outer wall surface of the outer wall (101) of the housing (1) is covered with vacuum insulation panels.