Disc-type jet mill

Abstract

Disc airflow mill relates to airflow mill structure technical field, including disc cavity shell, coaxial fixed ring is equipped with in disc cavity shell, and the cavity of disc cavity shell is divided into gas cavity and crushing cavity from outside to inside by fixed ring, the circumference wall of fixed ring is surrounded with several channels which are inclined to the radial direction of disc cavity shell, and the nozzle is detachably connected in the channel. The utility model solves the problems of the prior art in the prior art, the setting position of the feed inlet is limited, the high-speed airflow with material is easy to damage the crushing airflow in the crushing cavity, and the crushing efficiency is affected; and the nozzles are mostly conical threads, which are screwed on the cavity wall, the conical thread processing is difficult, the nozzle is a consumable part, the replacement cost is high, and the cavity wall is a circular arc surface, which is difficult to process a conical thread hole on the circular arc surface.

Description

Technical Field

[0001] This utility model relates to the technical field of airflow mill structure, specifically to a disc-type airflow mill. Background Technology

[0002] The working principle of a disc-type air jet mill is that high-speed jets are injected into the grinding chamber through Laval nozzles. At the confluence of multiple high-pressure airflows, the material is repeatedly pulverized through collision, friction, and shearing. The high-speed airflow forms a strong vortex within the grinding chamber, and the resulting centrifugal force causes the powder particles to move at high speed outside the grinding chamber. When the particle size is pulverized below the classification size, the centrifugal force is reduced, and the particles are released from the classification vortex by the centripetal airflow, entering the collection system through the central outlet. Due to its advantages such as economical operation, easy cleaning, and long service life, it is widely used in industries such as chemical, pharmaceutical, cosmetic, intermediate, and food processing.

[0003] A prior art patent with publication number CN214637107U discloses a solution including an air classifier mill body with an inlet and an outlet pipe. The inlet is connected to a screw feeder. A high-pressure air chamber and multiple pulverizing air nozzles penetrating the sidewalls of the air classifier mill body are located around its periphery. The pulverizing air nozzles inject high-pressure gas from the high-pressure air chamber tangentially into the inner cavity of the air classifier mill body. This eliminates the need for a feeding nozzle and instead uses a conventional screw feeder to directly deliver material to the upper part of the cavity, allowing it to fall into the cavity. Feeding does not consume high-pressure gas, and it fundamentally solves the problems of nozzle clogging and wear associated with traditional feeding nozzles. This achieves continuous production, reduces consumable usage, increases capacity, and avoids wear on the nozzles and the upper and lower surfaces of the cavity; it also reduces the introduction of impurities during wear, improving product quality.

[0004] Currently, the main types of relief valves for steam explosion equipment are the detonation cylinder and the ball valve.

[0005] As existing devices are used, the shortcomings of this technology have gradually become apparent, mainly in the following aspects:

[0006] First, existing air jet mills are limited by the location of the feed inlet, which makes it easy for the high-speed airflow carrying the material to disrupt the airflow in the grinding chamber, thus affecting the grinding efficiency.

[0007] Secondly, the nozzles are mostly set with tapered threads and screwed onto the cavity wall. The tapered threads are difficult to machine, and the nozzles are vulnerable parts with high replacement costs. In addition, the cavity wall is an arc surface, which makes it difficult to machine tapered thread holes on the arc surface.

[0008] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0009] In view of the shortcomings of the existing technology, this utility model solves the problems of existing airflow mills in traditional technology, which are limited by the setting position of the feed inlet, making it easy for the high-speed airflow carrying material to disrupt the airflow in the crushing chamber, thus affecting the crushing efficiency; and the nozzles are mostly set with tapered threads, which are screwed on the cavity wall. The tapered threads are difficult to process, and the nozzles are vulnerable parts with high replacement costs. Moreover, the cavity wall is a circular arc surface, which is difficult to process tapered thread holes on the circular arc surface.

[0010] To solve the above problems, this utility model provides the following technical solution:

[0011] A disc-type airflow mill includes a disc-shaped cavity shell. A partition ring is coaxially fixed inside the disc-shaped cavity shell, and the partition ring divides the inner cavity of the disc-shaped cavity shell from the outside to the inside into an air chamber and a grinding chamber.

[0012] The peripheral wall of the spacer ring is surrounded by several channels that are inclined radially to the disc-shaped cavity shell, and nozzles are detachably connected to the channels.

[0013] The top of the disc-shaped cavity shell is fixedly connected to a discharge cylinder that communicates with the crushing chamber, and the crushing chamber is provided with an airflow regulating seat that is raised and lowered below the discharge cylinder.

[0014] As an optimized solution, a positioning groove is provided on the outer wall of the spacer ring corresponding to each of the channels, and an ear plate that is fixedly attached to the outer wall of the nozzle near the tail end and is fitted into the positioning groove.

[0015] As an optimized solution, a fixing hole is provided on the ear plate, and a threaded groove coaxially arranged with the fixing hole is provided in the positioning groove. A screw is inserted into the fixing hole, and the end of the screw is threaded into the threaded groove.

[0016] As an optimized solution, the airflow regulating seat includes a lifting cylinder shell, and a guide protrusion is fixedly connected to the upper end of the lifting cylinder shell. The sidewall of the guide protrusion is arc-shaped from the upper center to the lower outer side.

[0017] As an optimized solution, the axis of the channel is set horizontally.

[0018] As an optimized solution, several of the nozzles are arranged with the same tilt direction.

[0019] As an optimized solution, the disc-shaped cavity shell includes an upper cover and a lower cover arranged side by side from top to bottom. A retaining ring is fixed between the outer rings of the upper cover and the lower cover, and the upper cover and the lower cover are connected to the upper and lower ends of the retaining ring by bolts.

[0020] As an optimized solution, an air inlet cylinder communicating with the air chamber is fixedly connected to the lower surface of the lower cover.

[0021] As an optimized solution, a fixing cylinder is fixed to the center of the lower cover using bolts, and the lifting cylinder shell is slidably disposed vertically inside the fixing cylinder.

[0022] As an optimized solution, the lower end of the fixed cylinder is fixed with a fixed cover by bolts, and a vertically arranged screw is threadedly connected to the fixed cover. The upper end of the screw is fixedly connected to the lower end of the lifting cylinder shell, and a counter nut is threadedly connected to the screw, which abuts against the lower surface of the fixed cover.

[0023] As an optimized solution, the upper cover and the lower cover are respectively provided with annular positioning grooves that abut against the inner ring of the spacer ring and the inner ring of the retaining ring.

[0024] As an optimized solution, a sealing ring is provided between the upper and lower ends of the spacer ring and the upper and lower covers.

[0025] As an optimized solution, a sealing ring is provided between the upper and lower ends of the retaining ring and the upper and lower covers.

[0026] As an optimized solution, the discharge cylinder is fixed to the upper cover using bolts.

[0027] As an optimized solution, handles are fixedly attached side-by-side to the upper surface of the cover.

[0028] Compared with the prior art, the beneficial effects of this utility model are:

[0029] By creating channels on the spacer ring and using screws to detachably connect the nozzle to the channels, it is easier to process and assemble compared to the traditional method of creating threaded grooves. This facilitates the disassembly and maintenance of the nozzle, simplifies the processing of the nozzle and its installation position, and reduces costs.

[0030] By rotating the screw to adjust the height of the airflow regulating seat, the pulverizing effect can be adjusted by regulating the flow rate of the pulverizing airflow; thus optimizing the pulverizing airflow and improving the pulverizing effect.

[0031] The airflow disc has detachable connections between its various components, facilitating assembly and replacement of parts during maintenance. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0033] Figure 1This is a schematic diagram of the structure of this utility model;

[0034] Figure 2 This is a top view of the structure of this utility model;

[0035] Figure 3 This is a schematic diagram of the positioning groove of this utility model.

[0036] In the diagram: 1-Upper cover; 2-Lower cover; 3-Spacer ring; 4-Air chamber; 5-Grinding chamber; 6-Baffle ring; 7-Guide protrusion; 8-Lifting cylinder shell; 9-Fixed cylinder; 10-Fixed cover; 11-Screw; 12-Top nut; 13-Air inlet cylinder; 14-Feeding cylinder; 15-Discharge cylinder; 16-Nozzle; 17-Positioning groove; 18-Ear plate; 19-Channel. Detailed Implementation

[0037] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0038] like Figure 1 As shown in Figure 3, the disc-type air jet mill includes a disc-shaped cavity shell. A partition ring 3 is coaxially fixed inside the disc-shaped cavity shell, and the partition ring 3 divides the inner cavity of the disc-shaped cavity shell from the outside to the inside into an air chamber 4 and a grinding chamber 5.

[0039] The periphery of the spacer ring 3 is surrounded by several channels 19 that are inclined radially to the disc-shaped cavity shell. Nozzles 16 are detachably connected to the channels 19.

[0040] The top of the disc-shaped cavity shell is fixedly connected to the discharge cylinder 15, which communicates with the crushing chamber 5. The crushing chamber 5 is equipped with an airflow regulating seat at a position below the discharge cylinder 15.

[0041] The outer wall of the spacer ring 3 is provided with a positioning groove 17 corresponding to each channel 19, and the outer wall of the nozzle 16 near the tail end is fixed with an ear plate 18 that is fitted into the positioning groove 17.

[0042] The ear plate 18 has a fixing hole, and the positioning groove 17 has a threaded groove coaxial with the fixing hole. A screw is inserted into the fixing hole, and the end of the screw is threaded into the threaded groove.

[0043] The airflow regulating seat includes a lifting cylinder shell 8, and a guide protrusion 7 is fixedly connected to the upper end of the lifting cylinder shell 8. The side wall of the guide protrusion 7 is arc-shaped from the center of the upper end to the outer side of the bottom end.

[0044] The axis of channel 19 is set horizontally.

[0045] Several nozzles 16 are set in the same tilt direction.

[0046] The disc-shaped cavity shell includes an upper cover 1 and a lower cover 2 arranged side by side from top to bottom. A retaining ring 6 is fixed between the outer rings of the upper cover 1 and the lower cover 2. The upper cover 1 and the lower cover 2 are connected to the upper and lower ends of the retaining ring 6 by bolts.

[0047] An air inlet cylinder 13 that communicates with the air chamber 4 is fixedly connected to the lower surface of the lower cover 2.

[0048] A fixed cylinder 9 is fixed to the center of the lower cover 2 by bolts, and the lifting cylinder shell 8 is slidably installed in the fixed cylinder 9 along the vertical direction.

[0049] The lower end of the fixed cylinder 9 is fixed with a fixed cover 10 by bolts. A vertically arranged screw 11 is threadedly connected to the fixed cover. The upper end of the screw 11 is fixedly connected to the lower end of the lifting cylinder shell 8. A counter nut 12 is also threadedly connected to the screw 11. The counter nut 12 abuts against the lower surface of the fixed cover 10.

[0050] On the opposite end faces of the upper cover 1 and the lower cover 2, there are respectively annular positioning grooves 17 that abut against the inner ring of the spacer ring 3 and the inner ring of the retaining ring 6.

[0051] Sealing rings are provided between the upper and lower ends of the spacer ring 3 and between the upper cover 1 and the lower cover 2.

[0052] Sealing rings are provided between the upper and lower ends of the retaining ring 6 and the upper cover 1 and the lower cover 2.

[0053] The discharge cylinder 15 is fixed to the upper cover 1 with bolts.

[0054] A handle is fixedly attached to the upper surface of the cover 1.

[0055] The upper surface of the cover 1 is inclinedly fixed with a feed cylinder 14 that communicates with the crushing chamber 5. The outlet end of the feed cylinder 14 is located at the middle position of the line connecting the outer ring of the discharge cylinder 15 and the inner ring of the spacer ring 3.

[0056] The working principle of this device is as follows:

[0057] By creating a channel 19 on the spacer ring 3 and using screws to detachably connect the nozzle 16 to the channel 19, it is easier to process and assemble than the traditional method of creating threaded grooves, and it is also easier to disassemble and maintain the nozzle 16; it simplifies the processing difficulty of the nozzle 16 and its installation position and reduces costs.

[0058] By rotating screw 11 to adjust the height of the airflow regulating seat, the pulverizing effect can be adjusted by regulating the flow rate of the pulverizing airflow; thus optimizing the pulverizing airflow and improving the pulverizing effect.

[0059] The airflow disc has detachable connections between its various components, facilitating assembly and replacement of parts during maintenance.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A disc-type airflow mill, comprising a disc-shaped cavity shell, wherein a partition ring (3) is coaxially fixed inside the disc-shaped cavity shell, and the partition ring (3) divides the inner cavity of the disc-shaped cavity shell from the outside to the inside into an air chamber (4) and a grinding chamber (5), characterized in that: The periphery of the partition ring (3) is surrounded by a number of channels (19) that are inclined radially to the disc-shaped cavity shell, and a nozzle (16) is detachably connected inside the channel (19). The top of the disc-shaped cavity shell is fixedly connected to the discharge cylinder (15) which communicates with the crushing chamber (5). The crushing chamber (5) is provided with an airflow regulating seat at a position below the discharge cylinder (15).

2. The disc-type airflow mill according to claim 1, characterized in that: The outer wall of the partition ring (3) is provided with a positioning groove (17) corresponding to each of the channels (19), and the outer wall of the nozzle (16) near the tail end is fixed with an ear plate (18) that is fitted into the positioning groove (17).

3. The disc-type airflow mill according to claim 2, characterized in that: The ear plate (18) has a fixing hole, and the positioning groove (17) has a threaded groove coaxial with the fixing hole. A screw is inserted into the fixing hole, and the end of the screw is threaded into the threaded groove.

4. The disc-type airflow mill according to claim 1, characterized in that: The airflow regulating seat includes a lifting cylinder shell (8), and a guide protrusion (7) is fixedly connected to the upper end of the lifting cylinder shell (8). The side wall of the guide protrusion (7) is arc-shaped from the upper center to the lower outer side.

5. The disc-type airflow mill according to claim 1, characterized in that: The axis of the channel (19) is set horizontally.

6. The disc-type airflow mill according to claim 1, characterized in that: The several nozzles (16) are arranged in the same tilt direction.

7. The disc-type airflow mill according to claim 4, characterized in that: The disc-shaped cavity shell includes an upper cover (1) and a lower cover (2) arranged side by side from top to bottom. A retaining ring (6) is fixed between the outer rings of the upper cover (1) and the lower cover (2). The upper cover (1) and the lower cover (2) are connected to the upper and lower ends of the retaining ring (6) by bolts.

8. The disc-type air jet mill according to claim 7, characterized in that: An air inlet cylinder (13) that communicates with the air chamber (4) is fixedly connected to the lower surface of the lower cover (2).

9. The disc-type airflow mill according to claim 7, characterized in that: The lower cover (2) is fixed with a fixed cylinder (9) by bolts at its center position, and the lifting cylinder shell (8) is slidably disposed in the fixed cylinder (9) along the vertical direction.

10. The disc-type airflow mill according to claim 9, characterized in that: The lower end of the fixed cylinder (9) is fixed with a fixed cover (10) by bolts. A vertically arranged screw (11) is threaded onto the fixed cover (10). The upper end of the screw (11) is fixed to the lower end of the lifting cylinder shell (8). A counter nut (12) is also threaded onto the screw (11). The counter nut (12) abuts against the lower surface of the fixed cover (10).

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