Hammer mill device

Abstract

The utility model discloses a hammer mill device, which solves the problems of overhigh material temperature, non-uniform feeding, insufficient feeding and material residue in a cavity after production when materials are crushed in a workshop, and adopts the main scheme that the hammer mill device comprises a screw cavity, a screw motor, a screw, a feeding reducing pipeline, a feeding funnel and a crushing cavity, the problem that the temperature of materials is too high due to the fact that the temperature of the cavity is too high is solved. The problem of non-uniform particle size caused by discontinuous feeding is solved; and after crushing is finished, part of residual materials exist at corners in the crushing cavity and the feeding system, so that the product quality is guaranteed, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dry powder culture medium crushing, and particularly relates to a hammer mill device. Background Art

[0002] Concept and Significance of Crushing Crushing is an operation process of breaking large materials into smaller particles or powders, and its main purpose is to reduce the particle size and increase the specific surface area. The significance of dry powder culture medium crushing lies in: ① It is beneficial to improve the uniformity and dispersibility of dry powder culture medium; ② Fine powder is beneficial to the uniform mixing of each component in the dry powder culture medium, and the degree of uniform mixing is related to the particle size of each component; ③ It helps to increase the surface area of dry powder culture medium powder and increase the solubility.

[0003] When the rotor of the hammer mill rotates at a high speed, due to the action of centrifugal force, the hammers become radial (for the rotor with suspended hammers). The material enters the machine after being rolled by the feeding roller, and is immediately broken into particles by the impact and tearing action of the hammers. The particles are discharged from the discharge sieve holes at the bottom of the machine. If the large materials that cannot pass through the sieve holes remain, they will be impacted by the hammers again until they pass through the sieve holes. The hammer mill does not break materials by the total energy of the rotor components, but mainly by the work done by the kinetic energy of the hammers to complete the crushing of materials.

[0004] In the actual crushing process, especially when the amount of crushed material is large, it is found that there are at least the following technical problems:

[0005] 1. When using a butterfly valve for feeding in the workshop, due to hardware reasons, the material falls into the crushing chamber in sections, affecting the uniformity of particle size during continuous production;

[0006] 2. During continuous crushing operation, the inside of the crushing chamber will heat up to above 35°C due to friction. The dry powder product is heat-sensitive, which has a great impact on product quality:

[0007] 3. When there is no cooling system during continuous crushing operation, the temperature inside the chamber is relatively high, and it is necessary to stop the operation and wait for natural cooling, which seriously affects the production efficiency and quality of dry powder culture medium and reduces the quality of dry powder products;

[0008] 4. The volume of the feeding device in the original factory state is small, the feeding times are more, there is a risk of material spilling, and the hopper has no lid. The slightly positive pressure in the production chamber will cause dust flying, affecting the yield and material balance;

[0009] 5. After the crushing in the original factory state is completed, some materials will get stuck in the corners of the feeding system and the crushing chamber, affecting the material yield and material balance, and also increasing the difficulty of cleaning the environment and equipment. Content of the Utility Model

[0010] In view of the deficiencies of the prior art, the utility model provides a hammer mill device that feeds through a feeding screw and cools down through cooling water. It consists of a screw cavity, a screw motor, a screw, a feeding variable-diameter pipe, a feeding funnel, a crushing cavity, cooling water, and a cooling water pipe, solving the problems of excessively high material temperature caused by too high cavity temperature; uneven particle size caused by discontinuous feeding; and the problem of partial residual material in the corners inside the crushing cavity and the feeding system after crushing, thus ensuring product quality and improving production efficiency.

[0011] The specific solution is a hammer mill device, including:

[0012] A crushing cavity, which is internally composed of a crushing knife group and a screen;

[0013] A screw cavity, in which a feeding screw is rotatably connected. One end of the screw cavity is connected to a screw motor through the exposed feeding screw, and the other end is communicated with a variable-diameter pipe at the bottom. The screw motor is used to servo-control the rotation speed of the feeding screw to adjust the feeding speed; the bottom of the variable-diameter pipe is communicated with the center of the top of the connecting crushing cavity, and the connections of the variable-diameter pipe corresponding to the screw cavity and the crushing cavity up and down are fixed through gaskets and stainless steel clamps;

[0014] A feeding funnel, which is communicated with the screw cavity and is used for loading and feeding materials;

[0015] A cooling water pipeline, which is communicated on one side of the crushing cavity and has cooling water circulating therein.

[0016] Further, the variable-diameter pipe is provided in multiple stages, and the adjacent stages of the variable-diameter pipes are fixed through gaskets and stainless steel clamps. The inner diameters of the multiple-stage variable-diameter pipes increase sequentially in the direction facing the crushing cavity.

[0017] Further, an air inlet pipeline is also communicated on the side of the feeding variable-diameter pipe closest to the crushing cavity. The air inlet pipeline is used to collect residual materials after production, and the gas used is compressed air.

[0018] Further, the inside of the crushing cavity is of a sandwich structure and is communicated with the cooling water pipeline corresponding to the sandwich. The cooling water is air-conditioning cooling water for recycling.

[0019] Further, the inner diameter size of the feeding funnel is not less than 260 mm, and the top of the feeding funnel is provided with an integrally sealed lid to reduce dust emission.

[0020] Further, a scavenging pipeline is also externally connected and communicated at the connection between the feeding funnel and the screw cavity.

[0021] Beneficial effects:

[0022] 1. The feeding screw feeds the materials, and the materials enter the crushing cavity evenly. The particle size presents a normal distribution, which better meets the product quality requirements.

[0023] 2. During continuous crushing operation, since the cold water cooling system is turned on, the materials inside the crushing cavity are always kept below 25°C. The appearance and physical and chemical properties of the product can be guaranteed at this temperature, improving the product quality stability.

[0024] 3. During continuous production, due to the large volume of the newly added hopper, the feeding frequency can be reduced, thus reducing the risk of material spillage. And since the hopper is equipped with a lid, it effectively avoids dust generation during production, improves the yield and material balance, and reduces the difficulty of cleaning the production site.

[0025] 4. After the crushing is completed, using the back-blowing system, most of the residual materials in the feeding system and the crushing system will be blown into the receiving bucket, improving the yield and material balance, and reducing the difficulty of cleaning the production site. Brief Description of the Drawings

[0026] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following will describe in detail with reference to the preferred embodiments of the present invention and the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of the hammer mill device of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the existing crusher device in the background technology.

[0029] Legend: 1, feeding screw; 2, feeding hopper; 3, cooling water pipeline; 4, crushing cavity; 5, screw motor; 6, variable-diameter pipeline; 7, back-blowing pipeline; 8, original feeding hopper; 9, feeding butterfly valve; 10, pneumatic valve; 11, original crushing cavity. Detailed Description of the Preferred Embodiments

[0030] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, those of ordinary skill in the art can propose various replaceable structural forms and implementation methods. Therefore, the following detailed description of the preferred embodiments and the accompanying drawings are only illustrative of the technical solution of the present invention and should not be regarded as the whole of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0031] Refer to the attached drawings of the specification Figure 2, a schematic diagram of the original pulverizer structure is clearly shown in the figure. That is, the original feeding process is to feed through the original feeding funnel 8, and then the feeding butterfly valve 9 cooperates with the pneumatic valve 10 at the side end to achieve the closing of the connection. Then the material enters the original pulverizing wall for crushing and granulation. Obviously, there are the following limitations in this feeding method and structure:

[0032] 1. When using the butterfly valve to feed in the workshop, due to hardware reasons, the material falls into the pulverizing cavity in segments, affecting the uniformity of particle size during continuous production;

[0033] 2. During continuous pulverizing operation, the temperature inside the pulverizing cavity will rise above 35°C due to friction. The dry powder product is heat-sensitive, which has a greater impact on product quality:

[0034] 3. When there is no cooling system during continuous pulverizing operation, the temperature inside the cavity is relatively high, and it is necessary to stop the operation and wait for natural cooling, which seriously affects the production efficiency and quality of the dry powder culture medium and reduces the quality of the dry powder product;

[0035] 4. The volume of the feeding device in the original factory state is small, the feeding times are more, there is a risk of material spilling, and there is no lid on the hopper. The slightly positive pressure in the production cavity will cause dust to fly, affecting the yield and material balance;

[0036] 5. After the pulverization in the original factory state is completed, some materials will get stuck in the corners of the feeding system and the pulverizing cavity 4, affecting the material yield and material balance, and also increasing the difficulty of cleaning the environment and equipment

[0037] Correspondingly, as Figure 1 shown, in this embodiment, the hammer-type pulverizer device specifically includes:

[0038] Pulverizing cavity, which is internally composed of a pulverizing knife group and a screen;

[0039] Screw cavity, in which a feeding screw 1 is rotatably connected. One end of the screw cavity is connected to a screw motor 5 through the exposed feeding screw 1. The other end is connected to a variable-diameter pipe 6 at the bottom. The screw motor 5 is used to servo-control the rotation speed of the feeding screw 1 to adjust the feeding speed; the bottom of the variable-diameter pipe 6 is connected to the center of the top of the pulverizing cavity 4. The connections of the variable-diameter pipe 6 corresponding to the screw cavity and the pulverizing cavity up and down are fixed by gaskets and stainless steel clamps;

[0040] Feeding funnel 2, which is connected to the screw cavity and is used for material loading and feeding;

[0041] Cooling water pipeline 3, which is connected to one side of the pulverizing cavity and has cooling water circulating inside.

[0042] In this embodiment, different from the original butterfly valve connection structure, the present application further provides a reduced-diameter pipeline 6 between the screw cavity and the crushing cavity. The reduced-diameter pipeline 6 is provided in multiple stages, and adjacent stages of the reduced-diameter pipeline 6 are fixed by gaskets and stainless steel clamps. The inner diameters of the multiple stages of the reduced-diameter pipeline 6 increase in sequence in the direction facing the crushing cavity.

[0043] An air inlet pipeline is also connected to the side of the feed reduced-diameter pipeline 6 closest to the crushing cavity. The air inlet pipeline is used to collect residual materials after production, and the gas used is compressed air. An air sweeping pipeline is also externally connected to the connection between the feed hopper 2 and the screw cavity. Whether it is the air inlet pipeline or the air sweeping pipeline, it is for the purpose of realizing the back blowing of materials. The realization of back blowing is through the air inlet pipeline installed on the reduced-diameter pipeline 6. After being connected to an external compressed air pump, the residual materials in the feeding system and the crushing system after production can be blown down, reducing material loss and improving the yield and material balance.

[0044] Similarly, the inside of the crushing cavity 4 is a sandwich structure, and the corresponding sandwich is connected to the cooling water pipeline 3. The cooling water is air-conditioning cooling water for recycling. The cooling in the crushing cavity is mainly realized by the cold water inlet and outlet pipelines and the jacket layer of the crushing cavity 4. The cold water can circulate continuously. Using this system, the material temperature can be stably maintained within 25°C - 35°C.

[0045] Furthermore, the inner diameter size of the feed hopper 2 is not less than 260 mm. The top of the feed hopper 2 is configured with an integrally sealed lid to reduce dust emission. Replace the feed hopper 2 with a larger volume to reduce the number of feedings, and at the same time, equip a sealed lid to reduce dust pollution.

[0046] The corresponding installation process is as follows:

[0047] 1. Connect the feed reduced-diameter pipeline 6 to the crushing cavity 4 and pad with a gasket, and fix it with a stainless steel clamp;

[0048] 2. Pad the screw cavity and the reduced-diameter pipeline 6 with a gasket and fix them with a stainless steel clamp;

[0049] 3. Insert the screw into the screw motor 5 and extend it into the screw cavity. Fix the motor to the screw cavity, and fix the screw at the other end with a plastic gasket and tighten it with a blind plate and a clamp;

[0050] 4. Connect the feed reduced-diameter pipeline 6 to the screw cavity and fix it with a gasket and a stainless steel clamp, and insert the compressed air pipes into the air blowing ports at both ends of the reduced-diameter pipeline 6 respectively;

[0051] 5. Place the feed hopper 2 on the reduced-diameter pipeline 6 and fix it with a gasket and a stainless steel clamp and cover the lid;

[0052] 6. Finally, install the crushing knife set and the screen in the crushing cavity 4, install the material receiving bucket below it, and turn on the cooling water switch. The installation is completed.

[0053] In this embodiment, a hammer mill crushing feeding cooling and recycling device is provided to solve the problems of overhigh temperature in the crushing cavity during the production of the prior art, uneven feeding and dust generation in the feeding system, and residual materials inside the equipment at the end of production. The device consists of a feeding system, a cooling system and a back-blowing system. First, turn on the cold water switch. After the material enters the feeding hopper, it enters the screw cavity, and then evenly enters the crushing cavity with the rotation of the screw. After being crushed, it passes through the screen. Finally, turn on the back-blowing system to collect the residual materials in the feeding system and the crushing cavity into the material receiving bucket through the screen.

[0054] Obviously, the above embodiments are only examples for clearly explaining the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A hammer mill device, characterized in that: include: The crushing chamber is composed of a crushing knife group and a screen; A screw cavity, in which a feed screw is rotatably connected, one end of the screw cavity is connected to a screw motor through the exposed feed screw, and the other end is connected to a variable diameter pipe at the bottom, and the screw motor is used to servo-control the rotation speed of the feed screw to adjust the feed speed; the bottom of the variable diameter pipe is connected to the top center of the crushing cavity, and the connection between the upper and lower corresponding screw cavities and the crushing cavity of the variable diameter pipe is fixed by gaskets and stainless steel clamps; A feeding funnel, connected to the screw cavity, for feeding materials; A cooling water pipeline is connected to one side of the pulverizing chamber, and cooling water is circulated in the pipeline.

2. The hammer mill device according to claim 1, characterized in that: The variable diameter pipes are arranged in multiple stages and the variable diameter pipes in adjacent stages are fixed by gaskets and stainless steel clamps. The inner diameters of the variable diameter pipes in multiple stages increase in sequence in the direction facing the crushing chamber.

3. The hammer mill device according to claim 2, characterized in that: The side of the feed reducing pipe closest to the crushing chamber is also connected to an air intake pipe, which is used to collect residual materials after production is completed, and the air used is compressed air.

4. The hammer mill device according to claim 1, characterized in that: The interior of the pulverizing cavity is a sandwich structure and the corresponding sandwich is connected to the cooling water pipeline. The cooling water is air-conditioning cooling water for recycling.

5. The hammer mill device according to claim 1, characterized in that: The inner diameter of the feeding funnel is not less than 260 mm, and the top of the feeding funnel is provided with an integrally sealed cover to reduce dust.

6. The hammer mill device according to claim 1, characterized in that: The connection point between the feed hopper and the screw cavity is also externally connected with a scavenging pipeline.

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