A ring mold for biomass pellet forming machine and preparation method thereof

Abstract

The invention discloses a ring die for a biomass particle forming machine and a preparation method thereof, comprising a ring die assembly, a water tank, a water pump and a cooling fan, wherein a water inlet of the water tank is connected to an upper end of the ring die assembly through a pipeline, a water outlet of the water tank is connected to a water inlet of a water pump through a pipeline, and a water outlet of the water pump is connected to a lower end of the ring die assembly through a pipeline; the ring die assembly comprises an upper die seat, a middle die seat, a lower die seat and an outer die sealing cover; a plurality of positive spiral grooves and reverse spiral grooves are arranged on an outer wall of the middle die seat, and the positive spiral grooves and the reverse spiral grooves are crossed to form a cooling water network; each die outlet hole is surrounded by the cooling water network, so that the cooling water and the metal arm surface of the cooling water network have sufficient contact area, thereby improving the cooling efficiency; the temperature of the ring die assembly is maintained within a reasonable range during long-term continuous operation, thereby ensuring that the metal properties of the ring die assembly are not affected, ensuring the strength of the ring die assembly, reducing the wear speed of the ring die assembly, improving the service life of the ring die assembly, and reducing the use cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of particle forming machines, and in particular, relates to a ring die for a biomass particle forming machine and a preparation method thereof. Background Art

[0002] my country is a large agricultural country with abundant crop straw resources, but due to unreasonable use, it not only wastes resources but also causes environmental pollution. Biomass pellet forming machine provides a way to reasonably use biomass resources.

[0003] The working principle of the biomass ring die pellet forming machine is as follows: the quenched and tempered crushed biomass material enters the ring die from the feeding port, and is evenly fed into the pressing space in the ring die by gravity, the centrifugal force generated by the rotation of the pressure roller, and the action of the feeding scraper. Under the strong squeezing action of the pressure roller and the ring die, the material is gradually compacted, squeezed into the die hole of the ring die and formed in the die hole. Since the extrusion of the material is continuous, the formed material is continuously discharged from the die hole in a columnar shape, and then cut into particles of the required length by the cutter.

[0004] Biomass ring die pellet forming machine has become the mainstream forming equipment due to its advantages of low energy consumption, large output and high quality of formed products. In order to increase the output of biomass ring die pellet forming machine, the machine generally works for a long time. Due to long-term continuous work, the internal temperature of the ring die continues to rise, which affects the metal properties of the ring die, reduces the strength of the ring die, accelerates the wear of the ring die, reduces the service life of the ring die, and increases the cost of use. Summary of the invention

[0005] The present invention provides a ring die for a biomass pellet forming machine and a preparation method thereof, so as to solve the problems existing in the above-mentioned background technology.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: a ring die for a biomass pellet forming machine, comprising a ring die assembly, a water tank, a water pump and a cooling fan, wherein the water inlet of the water tank is connected to the upper end of the ring die assembly through a pipeline, the water outlet of the water tank is connected to the water inlet of the water pump through a pipeline, and the water outlet of the water pump is connected to the lower end of the ring die assembly through a pipeline;

[0007] The ring die assembly comprises an upper die base, a middle die base, a lower die base and an outer die sealing cover, wherein the upper die base is connected to the upper end of the middle die base, the lower die base is connected to the lower end of the middle die base, the outer die sealing cover is sleeved on the outer sides of the upper die base, the middle die base and the lower die base for sealing, and a plurality of positive spiral grooves and reverse spiral grooves are arranged on the outer wall of the middle die base, and the positive spiral grooves and the reverse spiral grooves are crossed to form a cooling water network;

[0008] A water inlet is provided at the lower end of the outer mold sealing cover, and the water inlet is connected to the water outlet of the water pump through a pipeline. A water outlet is provided at the upper end of the outer mold sealing cover, and the water outlet is connected to the water inlet of the water tank through a pipeline.

[0009] Preferably, an annular cavity 1 is provided in the upper die seat, an annular cavity 2 is provided in the lower die seat, the upper end of the cooling water net is connected to the annular cavity 1, and the lower end is connected to the annular cavity 2.

[0010] Preferably, an annular groove 1 is provided on the outer wall of the upper die base, an annular groove 2 is provided on the lower end surface of the upper die base, an annular groove 3 is provided on the outer wall of the lower die base, and an annular groove 4 is provided on the upper end surface of the lower die base, annular sealing rings are sleeved in the annular groove 1 and the annular groove 2 and are sealed and connected to the outer die sealing cover, and annular sealing rings are sleeved in the annular groove 2 and the annular groove 4 and are sealed and connected to the middle die base.

[0011] Preferably, a plurality of die ejection holes are provided in a ring shape on the outer wall of the middle die base, and the die ejection holes are located in the middle of the grid formed by the intersection of the positive spiral groove and the reverse spiral groove to form the cooling water network.

[0012] Preferably, a demoulding sleeve is provided in the demoulding hole.

[0013] A method for preparing a ring die for a biomass pellet forming machine comprises the following steps:

[0014] Step S1: Milling a positive spiral groove clockwise on the middle die base;

[0015] Step S2: counterclockwise milling of the middle die base into a reverse spiral groove, so that the positive spiral groove and the reverse spiral groove intersect to form a cooling water network;

[0016] Step S3: drilling a mold hole in the middle of the grid formed by the intersection of the positive spiral groove and the reverse spiral groove to form a cooling water network.

[0017] The beneficial effects of adopting the above technical solution are:

[0018] 1. After the water pump of the ring die of the biomass pellet forming machine is turned on, the cooling water in the water tank is pumped into the annular cavity 2 in the lower die seat through the water inlet hole, and then the cooling water enters the cooling water network formed by the intersection of the positive spiral groove and the reverse spiral groove until it enters the annular cavity 1 in the upper die seat, taking away the heat in the ring die assembly, and then returns to the water tank through the pipeline and is cooled by the cooling fan, so that the temperature of the ring die assembly is kept within a reasonable range during long-term continuous operation, ensuring that the metal properties of the ring die assembly are not affected, ensuring the strength of the ring die assembly, reducing the wear rate of the ring die assembly, increasing the service life of the ring die assembly, and reducing the cost of use.

[0019] The ring die assembly includes an upper die base, a middle die base, a lower die base and an outer die sealing cover. The upper die base is connected to the upper end of the middle die base, the lower die base is connected to the lower end of the middle die base, and the outer die sealing cover is sealed on the outer sides of the upper die base, the middle die base and the lower die base, so that the middle die base can be detached from the upper die base and the lower die base, which facilitates the replacement and cleaning of the middle die base and reduces the cost of use.

[0020] The outer wall of the middle mold base is provided with a plurality of positive spiral grooves and reverse spiral grooves, and the positive spiral grooves and reverse spiral grooves intersect to form a cooling water network; the outer wall of the middle mold base is provided with a plurality of die-out holes in a ring shape, and the die-out holes are located in the middle position of the grid formed by the positive spiral grooves and reverse spiral grooves intersecting to form the cooling water network; each die-out hole is surrounded by the cooling water network, so that the cooling water and the metal arm surface of the cooling water network inside the middle mold base have sufficient contact area, which greatly improves the cooling efficiency. In addition, an annular cavity 1 is provided in the upper mold base, and an annular cavity 2 is provided in the lower mold base. The upper end of the cooling water network is connected to the annular cavity 1, and the lower end is connected to the annular cavity 2, which increases the cross-sectional area of ​​the cooling water, increases the amount of cooling water passing through the water cavity per unit time, and improves the cooling efficiency.

[0021] 2. A water inlet is provided at the lower end of the outer mold sealing cover, and the water inlet is connected to the water outlet of the water pump through a pipeline. A water outlet is provided at the upper end of the outer mold sealing cover, and the water outlet is connected to the water inlet of the water tank through a pipeline to realize the circulation of cooling water. An annular groove 1 is provided on the outer wall of the upper mold base, and an annular groove 2 is provided on the lower end surface of the upper mold base. An annular groove 3 is provided on the outer wall of the lower mold base, and an annular groove 4 is provided on the upper end surface of the lower mold base. Annular sealing rings are provided in the annular grooves 1 and 2 to be sealed with the outer mold sealing cover, and annular sealing rings are provided in the annular grooves 2 and 4 to be sealed with the middle mold base to ensure the sealing of annular cavity 1 and annular cavity 2.

[0022] 3. The preparation method of the ring die for the biomass pellet forming machine of the present invention comprises the following steps: milling a positive spiral groove clockwise on the middle die base; then milling a reverse spiral groove counterclockwise on the middle die base so that the positive spiral groove and the reverse spiral groove intersect to form a cooling water network; and then drilling a die hole in the middle position of the grid formed by the intersection of the positive spiral groove and the reverse spiral groove to form the cooling water network, so that each die hole is surrounded by the cooling water network without affecting the strength of the middle die base. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the working of the ring die for the biomass pellet forming machine of the present invention.

[0024] Figure 2 This is an assembly diagram of a ring die for a biomass pellet forming machine of the present invention;

[0025] Figure 3 This is a front view of the ring die for the biomass pellet forming machine of the present invention;

[0026] Figure 4 yes Figure 3 Sectional view at the middle AA position;

[0027] Figure 5 It is a schematic diagram of the upper die base structure;

[0028] Figure 6 It is a schematic diagram of the structure of the middle mold base;

[0029] Figure 7 It is a schematic diagram of the structure of the lower die base;

[0030] Figure 8 1 is a schematic diagram of the structure of the outer mold sealing cover;

[0031] Fig. 9 2. It is a schematic diagram of the structure of the ejection sleeve;

[0032] in:

[0033] 1. Ring die assembly; 2. Water tank; 3. Water pump; 4. Cooling fan;

[0034] 10. Upper die seat; 10-1. Annular cavity one; 10-2. Annular groove one; 10-3. Annular groove two; 11. Middle die seat; 11-1. Positive spiral groove; 11-2. Reverse spiral groove; 11-3. De-die hole; 11-4. De-die sleeve; 12. Lower die seat; 12-1. Annular cavity two; 12-2. Annular groove three; 12-3. Annular groove four; 13. Outer die sealing cover; 13-1. Water inlet hole; 13-2. Water outlet hole. DETAILED DESCRIPTION

[0035] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0036] like Figures 1 to 9 As shown, the present invention is a ring die for a biomass pellet forming machine and a preparation method, so that each die outlet hole is surrounded by a cooling water network, so that the cooling water and the metal arm surface of the cooling water network inside the middle die seat have sufficient contact area, which greatly improves the cooling efficiency; the temperature of the ring die assembly is maintained within a reasonable range during long-term continuous operation, ensuring that the metal properties of the ring die assembly are not affected, ensuring the strength of the ring die assembly, reducing the wear rate of the ring die assembly, increasing the service life of the ring die assembly, and reducing the cost of use.

[0037] Specifically, Figures 1 to 9As shown, it includes a ring mold assembly 1, a water tank 2, a water pump 3 and a cooling fan 4, the water inlet of the water tank 2 is connected to the upper end of the ring mold assembly 1 through a pipeline, the water outlet of the water tank 2 is connected to the water inlet of the water pump 3 through a pipeline, and the water outlet of the water pump 3 is connected to the lower end of the ring mold assembly 1 through a pipeline;

[0038] The ring die assembly 1 comprises an upper die base 10, a middle die base 11, a lower die base 12 and an outer die sealing cover 13, wherein the upper die base 10 is connected to the upper end of the middle die base 11, the lower die base 12 is connected to the lower end of the middle die base 11, and the outer die sealing cover 13 is sleeved on the outer sides of the upper die base 10, the middle die base 11 and the lower die base 12 for sealing, and a plurality of positive spiral grooves 11-1 and reverse spiral grooves 11-2 are arranged on the outer wall of the middle die base 11, and the positive spiral grooves 11-1 and the reverse spiral grooves 11-2 are crossed to form a cooling water network;

[0039] The outer mold sealing cover 13 has a water inlet 13-1 at the lower end, and the water inlet 13-1 is connected to the water outlet of the water pump 3 through a pipe. The outer mold sealing cover 13 has a water outlet 13-2 at the upper end, and the water outlet 13-2 is connected to the water inlet of the water tank 2 through a pipe.

[0040] The upper die base 10 is provided with an annular cavity 10-1, the lower die base 12 is provided with an annular cavity 12-1, the upper end of the cooling water net is connected to the annular cavity 10-1, and the lower end is connected to the annular cavity 12-1.

[0041] The upper die base 10 is provided with an annular groove 10-2 on its outer wall, and an annular groove 10-3 on its lower end surface; the lower die base 12 is provided with an annular groove 12-2 on its outer wall, and an annular groove 12-3 on its upper end surface; annular sealing rings are sleeved inside the annular groove 10-2 and the annular groove 12-2 to be sealed and connected to the outer die sealing cover 13; annular sealing rings are sleeved inside the annular groove 10-3 and the annular groove 12-3 to be sealed and connected to the middle die base 11.

[0042] The outer wall of the middle mold base 11 is provided with a plurality of die-out holes 11 - 3 in a ring shape, and the die-out holes 11 - 3 are located in the middle of the cooling water network formed by the intersection of the positive spiral groove 11 - 1 and the reverse spiral groove 11 - 2.

[0043] A demoulding sleeve 11 - 4 is inserted through the demoulding hole 11 - 3 .

[0044] A method for preparing a ring die for a biomass pellet forming machine comprises the following steps:

[0045] Step S1: Milling a positive spiral groove 11 - 1 clockwise on the middle die base 11 ;

[0046] Step S2: counterclockwise milling of the reverse spiral groove 11 - 2 is performed on the middle mold base 11 so that the positive spiral groove 11 - 1 and the reverse spiral groove 11 - 2 intersect to form a cooling water network;

[0047] Step S3: Drilling a mold hole 11 - 3 at the middle position of the cooling water network formed by the intersection of the positive spiral groove 11 - 1 and the reverse spiral groove 11 - 2.

[0048] The specific working method is described below with specific embodiments: Example

[0049] The ring die for the biomass pellet forming machine, after the water pump 3 is turned on, the cooling water in the water tank 2 is pumped into the annular cavity 2 12-1 in the lower die seat 12 through the water inlet hole 13-1, and then the cooling water enters the cooling water network formed by the intersection of the positive spiral groove 11-1 and the reverse spiral groove 11-2, until it enters the annular cavity 10-1 in the upper die seat 10, takes away the heat in the ring die assembly 1, and then returns to the water tank 2 through the pipeline, and is cooled by the cooling fan 4, so that the temperature of the ring die assembly 1 is maintained within a reasonable range during long-term continuous operation, ensuring that the metal properties of the ring die assembly 1 are not affected, ensuring the strength of the ring die assembly 1, reducing the wear rate of the ring die assembly 1, increasing the service life of the ring die assembly 1, and reducing the use cost.

[0050] The ring die assembly 1 includes an upper die base 10, a middle die base 11, a lower die base 12 and an outer die sealing cover 13. The upper die base 10 is connected to the upper end of the middle die base 11, and the lower die base 12 is connected to the lower end of the middle die base 11. The outer die sealing cover 13 is sealed on the outer sides of the upper die base 10, the middle die base 11 and the lower die base 12, so that the middle die base 11 can be detached from the upper die base 10 and the lower die base 12, which facilitates the replacement and cleaning of the middle die base 11 and reduces the cost of use.

[0051] The outer wall of the middle mold base 11 is provided with a plurality of positive spiral grooves 11-1 and reverse spiral grooves 11-2, and the positive spiral grooves 11-1 and reverse spiral grooves 11-2 intersect to form a cooling water network; the outer wall of the middle mold base 11 is provided with a plurality of die-out holes 11-3 in an annular shape, and the die-out holes 11-3 are located in the middle position of the grid formed by the positive spiral grooves 11-1 and reverse spiral grooves 11-2 intersecting to form the cooling water network; each die-out hole 11-3 is surrounded by the cooling water network, so that the cooling water and the metal arm surface of the cooling water network inside the middle mold base 11 have sufficient contact area, which greatly improves the cooling efficiency. In addition, an annular cavity 10-1 is provided in the upper mold base 10, and an annular cavity 2 12-1 is provided in the lower mold base 12. The upper end of the cooling water network is connected to the annular cavity 10-1, and the lower end is connected to the annular cavity 2 12-1, which increases the cross-sectional area of ​​the cooling water, increases the amount of cooling water passing through the water cavity per unit time, and improves the cooling efficiency. Example

[0052] On the basis of Example 1, a water inlet hole 13-1 is provided at the lower end of the outer mold sealing cover 13, and the water inlet hole 13-1 is connected to the water outlet of the water pump 3 through a pipeline, and a water outlet hole 13-2 is provided at the upper end of the outer mold sealing cover 13, and the water outlet hole 13-2 is connected to the water inlet of the water tank 2 through a pipeline to realize the circulation of cooling water; an annular groove 10-2 is provided on the outer wall of the upper mold base 10, and an annular groove 2 10-3 is provided on the lower end surface of the upper mold base 10, an annular groove 3 12-2 is provided on the outer wall of the lower mold base 12, and an annular groove 4 12-3 is provided on the upper end surface of the lower mold base 12, an annular groove 10-2 and annular groove 2 10-3 are sleeved with annular sealing rings to be sealed with the outer mold sealing cover 13, and annular sealing rings are sleeved in the annular groove 2 10-3 and annular groove 4 12-3 to be sealed with the middle mold base 11 to ensure the sealing of the annular cavity 10-1 and the annular cavity 2 12-1. Example

[0053] The preparation method of the ring die for the biomass pellet forming machine of the present invention comprises the following steps: milling a positive spiral groove 11-1 clockwise on the middle die base 11; then milling a reverse spiral groove 11-2 counterclockwise on the middle die base 11, so that the positive spiral groove 11-1 and the reverse spiral groove 11-2 intersect to form a cooling water network; and then drilling a die hole 11-3 at the middle position of the grid formed by the intersection of the positive spiral groove 11-1 and the reverse spiral groove 11-2 to form the cooling water network, so that each die hole 11-3 is surrounded by the cooling water network without affecting the strength of the middle die base 11.

[0054] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above-mentioned concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A ring die for a biomass pellet forming machine, characterized in that: It comprises a ring mold assembly (1), a water tank (2), a water pump (3) and a cooling fan (4), wherein the water inlet of the water tank (2) is connected to the upper end of the ring mold assembly (1) via a pipeline, the water outlet of the water tank (2) is connected to the water inlet of the water pump (3) via a pipeline, and the water outlet of the water pump (3) is connected to the lower end of the ring mold assembly (1) via a pipeline; The ring die assembly (1) comprises an upper die base (10), a middle die base (11), a lower die base (12) and an outer die sealing cover (13); the upper die base (10) is connected to the upper end of the middle die base (11); the lower die base (12) is connected to the lower end of the middle die base (11); the outer die sealing cover (13) is sleeved on the outer sides of the upper die base (10), the middle die base (11) and the lower die base (12) for sealing; a plurality of positive spiral grooves (11-1) and reverse spiral grooves (11-2) are provided on the outer wall of the middle die base (11); and the positive spiral grooves (11-1) and the reverse spiral grooves (11-2) are crossed to form a cooling water network; A water inlet hole (13-1) is provided at the lower end of the outer mold sealing cover (13), and the water inlet hole (13-1) is connected to the water outlet of the water pump (3) via a pipe; a water outlet hole (13-2) is provided at the upper end of the outer mold sealing cover (13), and the water outlet hole (13-2) is connected to the water inlet of the water tank (2) via a pipe; The upper die seat (10) is provided with an annular cavity 1 (10-1), the lower die seat (12) is provided with an annular cavity 2 (12-1), the upper end of the cooling water net is connected to the annular cavity 1 (10-1), and the lower end is connected to the annular cavity 2 (12-1); The upper die seat (10) is provided with an annular groove 1 (10-2) on its outer wall, and an annular groove 2 (10-3) is provided on its lower end surface; the lower die seat (12) is provided with an annular groove 3 (12-2) on its outer wall, and an annular groove 4 (12-3) is provided on its upper end surface; annular sealing rings are sleeved inside the annular grooves 1 (10-2) and 12-2 to be sealed with an outer die sealing cover (13); annular sealing rings are sleeved inside the annular grooves 2 (10-3) and 12-3 to be sealed with a middle die seat (11); A plurality of die-out holes (11-3) are provided in an annular manner on the outer wall of the middle die base (11), and the die-out holes (11-3) are located in the middle of a grid formed by the intersection of the positive spiral groove (11-1) and the reverse spiral groove (11-2) to form a cooling water network; The method for preparing the ring die for the biomass pellet forming machine specifically comprises the following steps: Step S1: Milling a positive spiral groove (11-1) in a clockwise direction on the middle die base (11); Step S2: counterclockwise milling of the reverse spiral groove (11-2) on the middle mold base (11) so that the positive spiral groove (11-1) and the reverse spiral groove (11-2) intersect to form a cooling water network; Step S3: drilling a mold hole (11-3) at the middle position of the grid formed by the intersection of the positive spiral groove (11-1) and the reverse spiral groove (11-2) to form a cooling water network.

2. The ring die for a biomass pellet forming machine according to claim 1, characterized in that: A demoulding sleeve (11-4) is inserted through the demoulding hole (11-3).

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