Underwater granulator die head heating device

Abstract

The utility model discloses an underwater granulator die head heating device which comprises a die head, an extrusion pipeline is arranged in the die head, a mounting ring is sleeved on the die head, the mounting ring is rotatably connected with the die head through a bearing, two groups of symmetrically distributed connecting ports are arranged on the mounting ring, and an air inlet pipe and an air outlet pipe are arranged on the mounting ring. The air inlet pipe and the air outlet pipe are symmetrically distributed relative to the mounting ring, a gear ring is adjusted on the mounting ring, a mounting frame is mounted below the die head, a gear is mounted on the mounting frame and rotationally connected with the mounting frame through a rotating shaft, a motor is arranged on the mounting frame, and the gear is in meshed connection with the gear ring; by arranging a mounting ring, a toothed ring, an air inlet pipe, an air outlet pipe and the like, uniform heating in the die head is realized, so that high-temperature steam enters the die head from all directions of the die head and then flows out of the air outlet pipe, and each group of extrusion pipelines and polymers in the extrusion pipelines are heated; and the problem that the polymer is condensed at the discharge hole or the raw material is blocked due to non-uniform temperature is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pelletizers, in particular to a die head heating device for an underwater pelletizer. Background Technique

[0002] A pelletizer is a multifunctional mechanical device widely used in many fields such as grain processing, food processing, chemical industry, pharmaceutical industry, plastic processing, and agriculture. Its main function is to cut materials into small particles or small pieces to meet the needs of different industries and improve production efficiency. When the pelletizer works, after the melt is extruded from the head of the extruder, it is directly sent to the cutting knife in contact with the cross-section of the die head and cut off. The cut pellets are then air-cooled or water-cooled. The equipment for hot cutting granulation is collectively called a die face hot cutting granulator.

[0003] During the working process of the pelletizer, the die head needs to have enough heat to maintain the temperature of the polymer throughout the extrusion process. Otherwise, condensation at the discharge port during the extrusion of the polymer is likely to cause problems such as raw material blockage. Currently, for the heating of the die head, oil, steam, cylindrical or belt-type electric heaters are mostly used. In the prior art, when using oil or steam to heat the die head, the flow direction of the oil or steam is fixed. As a result, the heating degrees of the polymer extrusion holes in the die head are different, and the viscosities of the polymers extruded from each hole are different, thus affecting the quality of subsequent pelletizing. Content of the Utility Model

[0004] The purpose of the utility model is to provide a die head heating device for an underwater pelletizer to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A die head heating device for an underwater pelletizer, including a die head. An extrusion pipeline is arranged inside the die head. An installation ring is sleeved on the die head. The installation ring is rotationally connected to the die head through a bearing. Two groups of symmetrically distributed connection ports are opened on the installation ring. An air inlet pipe and an air outlet pipe are arranged on the installation ring. The air inlet pipe and the air outlet pipe are symmetrically distributed with respect to the installation ring. A toothed ring is adjusted on the installation ring. An installation frame is installed below the die head, and a gear is installed on the installation frame.

[0006] As a further preferred of this technical solution, the gear is rotationally connected to the installation frame through a rotating shaft. A motor is arranged on the installation frame. The gear is meshed with the toothed ring, and the gear is connected to the output end of the motor through the rotating shaft.

[0007] As a further preferred of this technical solution, a fixed ring is fixedly sleeved on the installation ring. Two groups of symmetrically distributed through holes are opened on the fixed ring. The two groups of through holes are correspondingly arranged with the connection ports. The air inlet pipe and the air outlet pipe are both wound around the fixed ring in a ring shape. The air inlet pipe and the air outlet pipe both pass through the through holes and are connected to the connection ports.

[0008] As a further preference of this technical solution, two groups of symmetrically distributed mounting pipes are provided on the fixed ring. A piston is provided in the mounting pipe. A fixing frame is provided in the mounting pipe. A sliding rod is fixedly installed on the fixing frame. A spring is sleeved on the sliding rod.

[0009] As a further preference of this technical solution, the piston is slidably connected to the mounting pipe, and the piston is slidably sleeved on the sliding rod.

[0010] As a further preference of this technical solution, a stop block is fixedly installed at one end of the sliding rod away from the fixing frame. Two ends of the spring are respectively fixedly connected to the piston and the fixing frame.

[0011] The utility model provides an underwater pelletizer die head heating device, which has the following beneficial effects:

[0012] (1) The utility model realizes uniform heating of the die head by setting an installation ring, a toothed ring, an air inlet pipe and an air outlet pipe, etc., so as to ensure that high-temperature steam enters the die head from all directions of the die head and then flows out from the air outlet pipe, so as to heat each group of extrusion pipes and the polymer in the extrusion pipes, and avoid the problems of polymer condensation at the discharge port or raw material blockage caused by uneven temperature; during the heating process of the die head, high-temperature steam enters the installation ring from the air inlet pipe and flows out from the air outlet pipe. The steam is evenly filled in the whole interior of the installation ring and the outside of the extrusion pipe under the action of the pump body, and the polymer in the extrusion pipe is heated. At the same time, the motor is started to drive the gear to rotate, and the gear drives the installation ring to rotate evenly on the die head, so that the steam enters and flows out from different directions, and the flow direction of the steam is evenly changed, so as to ensure that the heating degree of each polymer extrusion hole in the die head is the same, reduce the viscosity difference of the polymer extruded from each extrusion pipe caused by temperature difference, and ensure the pelletizing quality.

[0013] (2) The utility model reduces the loss of the steam temperature in the installation ring by setting a fixed ring and winding the air inlet pipe and the air outlet pipe on the fixed ring. And the steam dissipates heat to the outside of the air inlet pipe and the air outlet pipe during the flowing process. The air inlet pipe and the air outlet pipe are wound on the fixed ring, and the dissipated heat is transferred to the inside of the fixed ring and the installation ring, reducing the heat loss during the steam flowing process. And the high temperature has a certain pressure on the installation ring and the die head during the heating process of the die head by the flowing steam in the installation ring. The installation ring expands under the pressure of the steam, and then squeezes the air between the fixed ring and the installation ring. After the installation ring expands to a certain extent, the air between the installation ring and the fixed ring squeezes the piston in the mounting pipe, and the piston is pushed out to realize the pressure relief of the air in the fixed ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the whole of the utility model;

[0015] Figure 2 Structural schematic diagram of the die head of the present utility model;

[0016] Figure 3 Structural schematic diagram of the mounting ring of the present utility model;

[0017] Figure 4 Structural schematic diagram of the fixing ring of the present utility model;

[0018] Figure 5 For the present utility model Figure 4 Enlarged structural view of location A;

[0019] In the figure: 1, die head; 2, extrusion pipe; 3, mounting ring; 4, connection port; 5, intake pipe; 6, exhaust pipe; 7, toothed ring; 8, gear; 9, motor; 10, fixing ring; 11, through hole; 12, mounting pipe; 13, piston; 14, slide bar; 15, spring; 16, fixing bracket; 17, stop block; 18, mounting bracket. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0021] The present utility model provides a technical solution: As Figure 1 , Figure 2 and Figure 3 shown, in this embodiment, an underwater pelletizer die head heating device includes a die head 1, an extrusion pipe 2 is provided inside the die head 1, a mounting ring 3 is sleeved on the die head 1, the mounting ring 3 is rotationally connected to the die head 1 through a bearing, two groups of symmetrically distributed connection ports 4 are provided on the mounting ring 3, an intake pipe 5 and an exhaust pipe 6 are provided on the mounting ring 3, the intake pipe 5 and the exhaust pipe 6 are symmetrically distributed with respect to the mounting ring 3, a toothed ring 7 is adjusted on the mounting ring 3, a mounting bracket 18 is installed below the die head 1, a gear 8 is installed on the mounting bracket 18, the gear 8 is rotationally connected to the mounting bracket 18 through a rotating shaft, a motor 9 is provided on the mounting bracket 18, the gear 8 is meshed with the toothed ring 7, and the gear 8 is connected to the output end of the motor 9 through a rotating shaft.

[0022] By setting up the installation ring 3, the toothed ring 7, the intake pipe 5, the outlet pipe 6, etc., uniform heating inside the die head 1 is achieved to ensure that high-temperature steam enters the die head 1 from all directions of the die head 1 and then flows out from the outlet pipe 6, so as to heat each group of extrusion pipes 2 and the polymer inside the extrusion pipes 2, and avoid problems such as polymer condensation at the discharge port or raw material blockage caused by uneven temperature; during the heating process of the die head 1, high-temperature steam enters the installation ring 3 from the intake pipe 5 and flows out from the outlet pipe 6. The steam is evenly filled inside the entire installation ring 3 and outside the extrusion pipes 2 under the action of the pump body to heat the polymer inside the extrusion pipes 2. At the same time, the motor 9 is started to drive the gear 8 to rotate, and the gear 8 drives the installation ring 3 to rotate evenly on the die head 1, so that the steam enters and flows out from different directions, uniformly changing the flow direction of the steam to ensure that the heating degree of each polymer extrusion hole inside the die head 1 is the same, reducing the viscosity difference of the polymer extruded from each extrusion pipe 2 caused by temperature difference, and ensuring the pelletizing quality.

[0023] As Figure 4 and Figure 5 shown, a fixed ring 10 is fixedly sleeved on the installation ring 3. Two groups of symmetrically distributed through holes 11 are opened on the fixed ring 10. The two groups of through holes 11 are arranged corresponding to the connection port 4. The intake pipe 5 and the outlet pipe 6 are both wound around the fixed ring 10 in a ring shape. The intake pipe 5 and the outlet pipe 6 both pass through the through holes 11 and are connected to the connection port 4. Two groups of symmetrically distributed installation pipes 12 are provided on the fixed ring 10. A piston 13 is arranged inside the installation pipe 12. A fixed frame 16 is arranged inside the installation pipe 12. A slide rod 14 is fixedly installed on the fixed frame 16. A spring 15 is sleeved on the slide rod 14. The piston 13 is slidably connected to the installation pipe 12. The piston 13 is slidably sleeved on the slide rod 14. One end of the slide rod 14 away from the fixed frame 16 is fixedly installed with a stop block 17. The two ends of the spring 15 are respectively fixedly connected to the piston 13 and the fixed frame 16.

[0024] By setting up the fixed ring 10 and winding the intake pipe 5 and the outlet pipe 6 around the fixed ring 10 to reduce the loss of steam temperature inside the installation ring 3, and the steam dissipates heat to the outside of the intake pipe 5 and the outlet pipe 6 during the flow process. The intake pipe 5 and the outlet pipe 6 are wound around the fixed ring 10, and the dissipated heat is transferred to the inside of the fixed ring 10 and the installation ring 3, reducing the heat loss during the steam flow process. During the heating process of the die head 1 by the flowing steam inside the installation ring 3, the high temperature has a certain pressure on both the installation ring 3 and the die head 1. The installation ring 3 expands under the pressure of the steam, and then squeezes the air between the fixed ring 10 and the installation ring 3. After the installation ring 3 expands to a certain extent, the air between the installation ring 3 and the fixed ring 10 squeezes the piston 13 inside the installation pipe 12, pushing the piston 13 out to realize the pressure relief of the air inside the fixed ring 10.

[0025] The utility model provides a die head heating device for an underwater pelletizer, and the specific working principle is as follows: during the heating process of the die head 1, high-temperature steam enters the mounting ring 3 from the air inlet pipe 5 and flows out from the air outlet pipe 6. The steam is evenly filled inside the entire mounting ring 3 and outside the extrusion pipe 2 under the action of the pump body, heating the polymer inside the extrusion pipe 2. Meanwhile, the motor 9 is started to drive the gear 8 to rotate, and the gear 8 drives the mounting ring 3 to rotate evenly on the die head 1, so that the steam enters and flows out from different directions, uniformly changing the flow direction of the steam to ensure that the heating degrees of the polymer extrusion holes in the die head 1 are consistent, reducing the viscosity difference of the polymer extruded from each extrusion pipe 2 caused by temperature difference, and ensuring the pelletizing quality. By setting the fixing ring 10 and winding the air inlet pipe 5 and the air outlet pipe 6 around the fixing ring 10, the loss of the steam temperature inside the mounting ring 3 is reduced. Moreover, the steam dissipates heat to the outside of the air inlet pipe 5 and the air outlet pipe 6 during the flowing process. The air inlet pipe 5 and the air outlet pipe 6 are wound around the fixing ring 10, and the dissipated heat is transferred to the inside of the fixing ring 10 and the mounting ring 3, reducing the heat loss during the steam flowing process. During the heating process of the die head 1 by the flowing steam inside the mounting ring 3, the high temperature has a certain pressure on both the mounting ring 3 and the die head 1. The mounting ring 3 expands under the pressure of the steam, thereby squeezing the air between the fixing ring 10 and the mounting ring 3. After the mounting ring 3 expands to a certain extent, the air between the mounting ring 3 and the fixing ring 10 squeezes the piston 13 inside the mounting pipe 12, pushing out the piston 13 to realize the pressure relief of the air inside the fixing ring 10.

[0026] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A die head heating device for an underwater pelletizer, comprising a die head (1), characterized in that: An extrusion pipe (2) is provided in the die head (1), a mounting ring (3) is sleeved on the die head (1), the mounting ring (3) is rotatably connected to the die head (1) via a bearing, two groups of symmetrically distributed connection ports (4) are provided on the mounting ring (3), an air inlet pipe (5) and an air outlet pipe (6) are provided on the mounting ring (3), the air inlet pipe (5) and the air outlet pipe (6) are symmetrically distributed with respect to the mounting ring (3), a gear ring (7) is adjusted on the mounting ring (3), a mounting frame (18) is installed below the die head (1), and a gear (8) is installed on the mounting frame (18).

2. The underwater pelletizer die head heating device according to claim 1, characterized in that: The gear (8) is rotatably connected to the mounting frame (18) via a rotating shaft, a motor (9) is provided on the mounting frame (18), the gear (8) is meshingly connected to the gear ring (7), and the gear (8) is connected to the output end of the motor (9) via the rotating shaft.

3. The underwater pelletizer die head heating device according to claim 1, characterized in that: A fixing ring (10) is fixedly sleeved on the mounting ring (3), and two groups of symmetrically distributed through holes (11) are provided on the fixing ring (10). The two groups of through holes (11) are arranged corresponding to the connecting port (4), and the air inlet pipe (5) and the air outlet pipe (6) are both annularly wound around the fixing ring (10), and the air inlet pipe (5) and the air outlet pipe (6) are both connected to the connecting port (4) by passing through the through holes (11).

4. The underwater pelletizer die head heating device according to claim 3, characterized in that: The fixing ring (10) is provided with two groups of symmetrically distributed mounting tubes (12), a piston (13) is provided in the mounting tube (12), a fixing frame (16) is provided in the mounting tube (12), a sliding rod (14) is fixedly mounted on the fixing frame (16), and a spring (15) is sleeved on the sliding rod (14).

5. The underwater pelletizer die head heating device according to claim 4, characterized in that: The piston (13) is slidably connected to the mounting tube (12), and the piston (13) is slidably sleeved to the sliding rod (14).

6. The underwater pelletizer die head heating device according to claim 4, characterized in that: A stopper (17) is fixedly mounted on one end of the slide rod (14) away from the fixing frame (16), and two ends of the spring (15) are fixedly connected to the piston (13) and the fixing frame (16) respectively.

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