Rotary valve mechanism capable of preventing material accumulation

Abstract

The utility model discloses a rotary valve mechanism capable of preventing material accumulation. The rotary valve mechanism comprises a shell; the rotating shaft is horizontally arranged, the rotating blades are arranged in the circumferential direction of the rotating shaft, the two blade end plates are fixedly arranged on the rotating shaft in a sleeving mode, the two ends of the rotating shaft are rotationally arranged on the two side plates of the shell, one end of the rotating shaft penetrates through the shell to be in transmission connection with a driving assembly, and the blade end plates are arranged on the two sides of the rotating blades. The two side edges of each rotating blade are fixedly connected with the blade end plates on the corresponding sides, and the free edge of each rotating blade is provided with a blade groove. One end of the feeding pipe extends into the shell from the outside of the shell, when the rotor mechanism is driven by the driving assembly to rotate, the multiple blade grooves sequentially and circularly pass through the lower portion of one end of the feeding pipe, particle powder in the mechanism directly falls into a box bin formed by the rotating blades and the blade end plates, the influence of airflow is small, and the particle powder is uniform in particle size. And the water is not easy to gather at the pipe orifice position and the connection position of the rotating shaft and the inner wall of the box shell and is not easy to leak to the bearing position.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of powder particle conveying. More specifically, the utility model relates to a rotary valve mechanism capable of preventing material accumulation. BACKGROUND

[0002] In the petroleum chemical industry, metal smelting, mining and other industries, the transfer of dust, powder and particulate matter often uses pneumatic conveying devices. The most critical equipment in the pneumatic conveying system is the rotary feeder.

[0003] Accurate and stable discharging of the rotary discharging device is particularly important in production lines to control the rhythm and discharging speed. In the prior art, the rotary discharging device is easily affected by the material particles, causing the material to block inside the rotary feeding chamber. In particular, for materials that are prone to clumping and aggregation, if appropriate measures are not taken, the rotary feeding device is easily blocked, affecting the feeding effect. In the existing rotary discharging mechanism, powder is easily introduced into the shaft seal end or adhered to the inner wall of the feed pipe and the box shell, causing the device to be stuck and unable to rotate.

[0004] Chinese patent with publication number CN116081311A discloses a continuous feeding rotary valve for a powder pneumatic conveying system, which is provided with a rotor end plate on a rotating shaft. The rotor end plate and the end cover are connected by matching the convex platform and the concave groove. However, in this device, the particle powder is affected by the collision caused by the rotating blade when entering the rotary valve, and is affected by the airflow generated by the blade to fill the inner chamber of the rotary valve. After the particle powder enters the gap between the rotor end plate and the end cover, dust accumulation is easily caused due to the matching of a large number of convex platforms and concave grooves between the end plate and the end cover, affecting the rotation of the rotor mechanism.

[0005] Chinese patent with authorization announcement number CN220264404U discloses a rotary feeder type of pressure feeding pneumatic conveying system, which is provided with an arc-shaped plate inclined downward on the left side of the inner wall of the shell. When the blade rotates clockwise from left to right, the material falls into the space between the blades on the left side as little as possible. The rotor avoids blocking the airflow inlet of the exhaust passage during the rotation of the blade. This scheme solves the problem of blockage caused by airflow to a certain extent, but does not completely consider the influence of dust accumulation on the connection between the rotating shaft and the shell. The balance hole is also easily affected by blockage, and blockage is also easily caused in the conveying of fine or damp dust. Therefore, a new type of rotary valve mechanism is needed to more effectively solve the problem of material accumulation in the rotary valve. UTILITY MODEL CONTENTS

[0006] An object of the utility model is to provide a rotary valve mechanism capable of preventing material accumulation and effectively solving the problem of material accumulation inside.

[0007] In order to realize the purposes and other advantages of the present application, according to one aspect of the present application, a rotating valve mechanism capable of preventing material accumulation is provided, comprising: a housing; a rotor mechanism rotatably arranged inside the housing, the rotor mechanism comprising: a rotating shaft arranged horizontally, a plurality of rotating vanes arranged at equal intervals along the circumference of the rotating shaft, and two vane end plates respectively fixedly sleeved on the rotating shaft, the two ends of the rotating shaft being rotatably arranged on opposite side plates of the housing, one end of the rotating shaft extending out of the housing and being in transmission connection with a driving assembly, the two vane end plates being arranged on the two sides of the plurality of rotating vanes, the two side edges of each rotating vane being respectively fixedly connected with the vane end plate on the corresponding side, and a vane groove being arranged on the free edge of each rotating vane; and a feeding pipe, one end of which extends into the housing from outside the housing, when the rotor mechanism rotates under the driving of the driving assembly, the plurality of vane grooves sequentially and cyclically pass through one end of the feeding pipe (2).

[0008] Preferably, the opposite side plates of the housing are two flange mounting plates, an annular flange plate is connected to the outside of the flange mounting plates, the two ends of the rotating shaft respectively pass through the center of the flange mounting plates and the annular flange plate, an annular cavity is formed between the inner annular wall of the annular flange plate far from the flange mounting plate and the rotating shaft, the end of the annular cavity near the flange mounting plate extends radially inwardly to form an annular flange plate, the end of the rotating shaft passes through the middle of the annular flange plate, the end of the annular cavity far from the flange mounting plate is provided with an internal thread section, and a plurality of layers of sealing packing are arranged between the outer periphery of the rotating shaft and the inner wall of the annular cavity, wherein, a sealing nut provided with an external thread is matched and threadedly connected with the internal thread section, and the sealing packing is compressed between the sealing nut and the annular flange plate.

[0009] Preferably, two side bearings are fixedly arranged on the two sides of the annular flange plate, and the two ends of the rotating shaft respectively match and are arranged in the side bearings on the corresponding sides.

[0010] Preferably, the housing is in a cylindrical shape, the side plates of the housing through which the rotating shaft extends are flat, the vane end plates are parallel to and close to the inner wall of the side plates of the housing, and the edges of the free edges of the rotating vanes are close to the inner wall of the arc-shaped housing of the housing.

[0011] Preferably, a downwardly tapering lower hopper is communicated with the lowermost part of the housing, and a discharge pipe is communicated with the bottom of the lower hopper.

[0012] Preferably, the inner diameters of the discharge pipe and the feeding pipe are the same.

[0013] Preferably, a plurality of sawtooth grooves are arranged on the inner wall of the discharge pipe in the axial direction.

[0014] Preferably, the drive assembly includes a reduction motor, a rotor of which is drivingly connected to one end of the rotating shaft.

[0015] Preferably, when the feed pipe is located in the vane groove, the gap between the feed pipe and the vane groove is not more than 1mm.

[0016] Preferably, the gap between the edge of the free edge of the rotating vane and the shell is not more than 1mm, and the gap between the vane end plate and the shell side wall is not more than 1mm.

[0017] The utility model at least has following beneficial effects:

[0018] First, the rotating valve mechanism provided by the utility model runs, and two adjacent rotating vanes and the vane end plates on both sides form a box-shaped semi-closed chamber, the vane end plates on both sides block the movement of the granular powder to both sides due to the rotation of the rotating vanes, so that the granular powder is gathered at the connection between the rotating shaft and the shell, and the possibility of the granular powder entering the sealed shaft end is greatly reduced.

[0019] Second, the rotating valve mechanism provided by the utility model runs, and the granular powder enters the shell from the feed pipe, the granular powder directly falls between the two rotating vanes from the feed pipe, compared with the rotating valve structure form in which the discharge pipe is directly connected to the shell, the granular material is directly conveyed between the rotating vanes in the device, the granular powder falling from the discharge port is less affected by the airflow, and the powder particles prone to caking and gathering at the discharge pipe port are stripped from the discharge pipe port by the continuously rotating rotating vanes and cannot gather on the inner wall of the shell, causing blockage.

[0020] Third, the fixed shaft of the rotating shaft of the rotating valve mechanism is located on the outside of the shell on both sides, so that even if the granular powder leaks from the joint position of the shell and the rotating shaft, the leakage can be blocked by the sealing packing in the annular flange, and the leakage cannot enter the side bearing and affect the rotation.

[0021] Other advantages, objects and features of the utility model will be embodied partly through the following description, and will be understood by those skilled in the art through research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a rotor mechanism schematic view in one technical scheme of the utility model;

[0023] Figure 2 It is a rotating valve mechanism overall schematic view in one technical scheme of the utility model;

[0024] Figure 3 It is a rotating valve mechanism front section view schematic view in one technical scheme of the utility model;

[0025] Figure 4 is a technical scheme of the utility model for a technical scheme of the utility model ring flange inner sealing structure disassembly schematic view;

[0026] Figure 5 is a technical scheme of the utility model for a technical scheme of the utility model ring flange inner sealing structure schematic view;

[0027] Figure 6 is a technical scheme of the utility model for a technical scheme of the utility model rotary valve mechanism side schematic view;

[0028] Figure 7 is a technical scheme of the utility model for a technical scheme of the utility model discharge pipe cross section schematic view. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail in combination with the drawings, so that the person skilled in the art can implement according to the description.

[0030] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0031] It should be noted that the experimental methods in the following embodiments are conventional methods unless otherwise specified, and the components can be obtained from commercial channels unless otherwise specified; in the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "set" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The orientation or position relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0032] As Figures 1-7As shown, the technical scheme of the present application provides a kind of rotating valve mechanism for preventing material accumulation, comprising: shell 1;Rotor mechanism 3, which is rotatably arranged inside the shell 1, the rotor mechanism 3 includes: horizontally arranged rotating shaft 31, a plurality of rotating blades 32 are arranged at equal intervals along the circumference of the rotating shaft 31, and two blade end plates 33 are respectively fixedly sleeved on the rotating shaft 31, the two ends of the rotating shaft 31 are rotatably arranged on the opposite two side plates of the shell 1, one end of the rotating shaft 31 penetrates the shell 1 and is drivingly connected with a driving assembly, the two blade end plates 33 are arranged on the two sides of the plurality of rotating blades 32, the two side edges of each rotating blade 32 are respectively fixedly connected with the blade end plate 33 on the corresponding side, and a blade groove 320 is arranged on the free edge of each rotating blade 32;Feeding pipe 2, one end of which extends into the shell 1 from the outside of the shell 1, when the rotor mechanism is rotated under the driving of the driving assembly, the plurality of blade grooves 320 sequentially circulate from one end of the feeding pipe 2.

[0033] In the technical scheme, the shell 1 is connected with a support 10 outside, and is fixed on a wall or other similar fixed structure according to the working scene, the internal cavity of the shell 1 is matched in size with the rotor mechanism 3, the feeding pipe 2 is sealed at the joint position with the shell 1 to avoid dust leakage during transportation, the driving assembly can adopt a reduction motor or a servo motor, the rotor of the motor is matched with a shaft coupling to form a transmission connection with the end of the rotating shaft 31 to drive the rotating shaft 31 to rotate, the rotating blade 32 is a metal or other hard sheet structure, and the rotating blade 32 can be welded with the rotating shaft 31, wherein the bottom of the feeding pipe 2 is lower than the upper edge of the uppermost rotating blade 32, the rotating blade 32 is in the shape of "concave", the rotor mechanism 3 makes the pipe body of the feeding pipe 2 pass through the blade groove 320 during rotation, the shape of the blade groove 320 is matched with that of the feeding pipe 2, and the gap between the blade groove 320 and the feeding pipe 2 is small, the rotating blade 32 pushes away the dust particles falling from the feeding pipe 2 during rotation, the blade groove 320 can avoid the aggregation of dust particles that are easy to aggregate and block at the pipe opening of the feeding pipe 2 and the inner wall of the shell 1, and since the dust particles are directly discharged at the middle height of the rotating blade 32, the dust particles are less affected by air flow disturbance and collision, and there is less dust floating in the shell 1.

[0034] In the technical solution, two adjacent rotating blades 32 and the blade end plates 33 on both sides form a box-shaped chamber, and the blade end plates 33 and the rotating shaft 31 can be connected by welding. The rotating shaft 31 can be expanded in the area between the two blade end plates 33 to form a rotating shaft expansion section 310, facilitating the welding operation between the rotating shaft 31, the blade end plates 33, and the rotating blades 32 and reinforcing the shaft body. Since the particle powder enters the position between the rotating blades 32 from the feed pipe 2, it is less affected by the rotating blades 32 and the blade airflow, and most of the particle powder can be stably retained in the chamber formed by the rotating blades 32 and the blade end plates 33 and rotate with the rotating shaft 31. The blade end plates 33 can prevent the particle powder between the two adjacent rotating blades 32 from moving to both sides and entering the connection position of the rotating shaft 31 and the shell 1. Optionally, the gap between the blade end plates 33 and the inner wall of the shell 1 is extremely small, further preventing the floating powder under the influence of airflow from entering the connection position of the rotating shaft 31 and the shell 1.

[0035] In the technical solution, the rotating shaft 31 extends out of the shell 1 on both sides. In addition to the transmission connection with the driving assembly, the rotating shaft 31 can also be provided with a bearing device fixed to the outside of the shell 1 on the shaft body outside the shell 1, so that the rotating shaft 31 can smoothly rotate under the action of the driving assembly. The intersection position of the rotating shaft 31 and the shell 1 needs to be sealed to prevent dust and particles from leaking out.

[0036] In another technical solution, the opposite two side plates of the shell 1 are two flange mounting plates 4, and the outer side of the flange mounting plate 4 is connected with an annular flange plate 5. The two ends of the rotating shaft 31 respectively pass through the centers of the flange mounting plate 4 and the annular flange plate 5 on the corresponding side. An annular cavity 50 is formed between the inner ring wall of the annular flange plate 5 away from the flange mounting plate 4 and the rotating shaft 31. The end of the annular cavity 50 near the flange mounting plate 4 extends radially inwardly to form an annular flange plate 501. The end of the rotating shaft 31 passes through the middle of the annular flange plate 501. One end of the inner wall of the annular cavity 50 away from the flange mounting plate 4 is provided with an internal thread section 500. A plurality of layers of sealing fillers 51 are arranged between the outer periphery of the rotating shaft 31 and the inner wall of the annular cavity 50. One of the sealing fillers 51 is provided with an external thread and is matched and threadedly connected with the internal thread section 500. The sealing fillers 51 are compressed between the sealing nut 53 and the annular flange plate 501.

[0037] As Figures 3~4As shown, the flange mounting plate 4 can be removed from the housing 1, facilitating maintenance of the interior of the housing 1 and the removal of the rotating shaft 31 for maintenance. The flange mounting plate 4 has a hole in its center for the rotating shaft 31 to pass through. The outer side of the flange mounting plate 4 has a recessed tongue and groove for precise installation of the annular flange 5. Multiple sealing fillers 51 are provided between the annular cavity 50 in the center of the annular flange 5 and the rotating shaft 31. The sealing fillers 51 are made of polyethylene, PTFE, or graphite and can be fitted around the outer circumference of the rotating shaft 31 to fill the space of the annular cavity 50 and provide sealing between the rotating shaft 31 and the housing 1. The gap is sealed by a tapered sealing nut 53 with external threads and a through hole in the middle for the rotating shaft 31 to pass through. After the sealing nut 53 is screwed onto the internal thread section 500, the sealing packing 51 is squeezed by the sealing nut 53 and the annular flange 501. Optionally, a commercially available packing seal 52 can be provided between the sealing packing 51 and the sealing nut 53. The packing seal 52 acts as a component that squeezes the sealing packing 51, while the sealing nut 53 presses against the packing seal 52. In this way, the sealing nut 53 is not easy to rotate, further improving the sealing effect.

[0038] In another technical solution, two side bearings 61 are fixed externally on both sides of the annular flange 5. The rotating shaft 31 extends through both ends of the annular flange 5 and is respectively fitted into the corresponding side bearings 61. There is no direct contact between the rotating shaft 31 and the housing 1 or the annular flange 5. The bearings that rotatably fix the rotating shaft 31 are located on both sides of the housing 1. Figure 3 As shown, the side bearing 61 is connected to the outer wall of the housing 1 through the bearing mounting plate 6, the annular flange 5, and the flange mounting plate 4 in sequence. The side bearing 61 is far from the junction of the housing 1 and the rotating shaft 31, and there are sealing measures between them to prevent dust leakage, further preventing the rotor mechanism 3 from reducing its working efficiency due to dust entering the bearing.

[0039] In another technical solution, the housing 1 is cylindrical, with straight side plates extending from the rotating shaft 31 on both sides. The blade end plates 33 are parallel and close to the inner wall of the side plates of the housing 1. The free edge of the rotating blade 32 is close to the inner wall of the arc shell of the housing 1. The gaps between the rotor mechanism 3 and the inner wall of the housing 1 are small, which further prevents the granular powder from accumulating on the inner wall of the housing 1 due to moisture or from entering the junction of the rotating shaft 31 and the housing 1 due to airflow.

[0040] In another technical solution, the lowermost part of the shell 1 is communicated with a lower hopper 11 in the shape of an inverted cone, the bottom of which is communicated with a discharge pipe 110, and the granular powder fed into the shell 1 through the feeding pipe 2 freely falls into the lowermost lower hopper 11 under the action of the rotating blade 32, and the bottom of the lower hopper 11 is communicated with the discharge pipe 110. Optionally, in special use scenarios, the relative position of the lower hopper 11 to the shell 1 can be adjusted according to actual needs.

[0041] In another technical solution, the inner diameter of the discharge pipe 110 is the same as that of the feeding pipe 2, so as to avoid the pressure difference between the feeding and discharging in the shell, which reduces the conveying efficiency or increases the congestion.

[0042] In another technical solution, the inner wall of the discharge pipe 110 is provided with a plurality of sawtooth grooves in the axial direction, and the cross section and the length of the joint edge of the communication part of the discharge pipe 110 to the shell 1 are both larger than those of a conventional round port, which further reduces the possibility of blockage in the shell 1.

[0043] In another technical solution, the driving assembly includes a speed reducer motor 7, the rotor of which is drivingly connected to one end of the rotating shaft 31. The speed reducer motor 7 can drive the rotating shaft 31 in cooperation with the shaft coupling 8. The speed reducer motor 7 and the shaft coupling 8 are commercially available finished components. Optionally, a servo motor can also be used to more accurately drive the rotating shaft 31.

[0044] In another technical solution, when the feeding pipe 2 is located in the blade groove 320, the gap between the feeding pipe 2 and the blade groove 320 is not more than 1 mm, and the rotating blade 32 can remove all the granular powder discharged from the feeding pipe 2 without omission, without the influence of air flow due to the large gap between the feeding pipe 2 and the blade groove 320.

[0045] In another technical solution, the gap between the free edge of the rotating blade 32 and the shell 1 is not more than 1 mm, and the gap between the blade end plate 33 and the side wall of the shell 1 is not more than 1 mm. The gap between the rotor mechanism 3 and the shell 1 is small, the granular powder is less affected by the air flow in the shell 1, and the granular powder is less likely to adhere to the inner wall of the shell 1. The probability of the granular powder entering the joint between the rotating shaft 31 and the shell 1 is lower.

[0046] The number of components and the scale of the process described herein are used to simplify the description of the present application. Applications, modifications and variations of the present application are obvious to those skilled in the art.

[0047] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. A rotary valve mechanism for preventing material accumulation, characterized in that, include: Shell (1); The rotor mechanism (3) is rotatably disposed inside the housing (1). The rotor mechanism (3) includes: a horizontally disposed rotating shaft (31), a plurality of rotating blades (32) equidistantly disposed along the circumference of the rotating shaft (31), and two blade end plates (33) respectively fixedly mounted on the rotating shaft (31). The two ends of the rotating shaft (31) are rotatably disposed on opposite side plates of the housing (1). One end of the rotating shaft (31) passes through the housing (1) and is connected to a drive assembly. The two blade end plates (33) are disposed on both sides of the plurality of rotating blades (32). The two sides of each rotating blade (32) are fixedly connected to the corresponding blade end plate (33). A blade groove (320) is provided on the free side of each rotating blade (32). The feed pipe (2) extends from the outside of the housing (1) into the inside of the housing (1). When the rotor mechanism rotates under the drive of the drive assembly, a plurality of blade grooves (320) pass through one end of the feed pipe (2) in sequence.

2. The rotary valve mechanism for preventing material accumulation as described in claim 1, characterized in that, The housing (1) has two flange mounting plates (4) on opposite sides. An annular flange (5) is connected to the outer side of the flange mounting plate (4). The two ends of the rotating shaft (31) pass through the center of the flange mounting plate (4) and the annular flange (5) on their respective sides. An annular cavity (50) is formed between the inner annular wall of the annular flange (5) and the rotating shaft (31). An annular flange (501) extends radially inward from the end of the annular cavity (50) near the flange mounting plate (4). The end of the rotating shaft (31) passes through the middle of the annular flange plate (501). The inner wall of the annular cavity (50) is provided with an internal thread section (500) at one end of the flange mounting plate (4). A multi-layer sealing packing (51) is provided between the outer periphery of the rotating shaft (31) and the inner wall of the annular cavity (50). Among them, a sealing nut (53) with an external thread is threadedly connected to the internal thread section (500). The sealing packing (51) is pressed between the sealing nut (53) and the annular flange plate (501).

3. The rotary valve mechanism for preventing material accumulation as described in claim 2, characterized in that, Two side bearings (61) are fixed on both sides of the annular flange (5). The rotating shaft (31) passes through the two ends of the annular flange (5) and is respectively matched and sleeved in the side bearings (61) on the corresponding sides.

4. The rotary valve mechanism for preventing material accumulation as described in claim 1, characterized in that, The housing (1) is cylindrical, with straight side plates extending from the rotating shaft (31) on both sides. The blade end plate (33) is parallel and close to the inner wall of the side plate of the housing (1). The edge of the free side of the rotating blade (32) is close to the inner wall of the arc shell of the housing (1).

5. The rotary valve mechanism for preventing material accumulation as described in claim 1, characterized in that, The bottom of the shell (1) is connected to an inverted conical hopper (11), and the bottom of the hopper is connected to a discharge pipe (110).

6. The rotary valve mechanism for preventing material accumulation as described in claim 5, characterized in that, The discharge pipe (110) has the same inner diameter as the feed pipe (2).

7. The rotary valve mechanism for preventing material accumulation as described in claim 5, characterized in that, The inner wall of the discharge pipe (110) is provided with several serrated grooves along the axial direction.

8. The rotary valve mechanism for preventing material accumulation as described in claim 1, characterized in that, The drive assembly includes a geared motor (7), whose rotor is connected to one end of the rotating shaft (31).

9. The rotary valve mechanism for preventing material accumulation as described in claim 1, characterized in that, When the feed pipe (2) is located in the blade groove (320), the gap between the feed pipe (2) and the blade groove (320) shall not exceed 1 mm.

10. The rotary valve mechanism for preventing material accumulation as described in claim 4, characterized in that, The gap between the free edge of the rotating blade (32) and the housing (1) shall not exceed 1 mm, and the gap between the blade end plate (33) and the side wall of the housing (1) shall not exceed 1 mm.

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