Labyrinth sealing type rotary feeder

Abstract

The utility model discloses a labyrinth sealing type rotary feeder, and relates to the field of feeders. According to the scheme, the device comprises a box body with two through ends and used for feeding and discharging materials; the side box plate is fixed on the side surface of the box body; the impeller is rotationally connected with the box body and used for intermittent feeding, wedge-shaped faces are arranged on the outer surfaces of the two sides of the impeller, side edge sealing plates are fixed to the inner walls of the side box plates, the shapes of the side edge sealing plates are matched with the wedge-shaped faces, and cavities are formed between the side box plates and the impeller; and the air inlet nozzle is fixed on the side box plate, and an inner cavity of the air inlet nozzle is communicated with the cavity. The wedge-shaped surface is arranged on the edge of the impeller and is covered by the side edge sealing plate, the cavity is formed between the impeller and the side box plate, gas can be injected into the cavity through the gas inlet nozzle, the gas can be blown into the box body through the space between the side edge sealing plate and the wedge-shaped surface, powder is prevented from entering the space between the impeller and the side box plate, and meanwhile the gas enters the box body; blanking can be promoted, and powder is prevented from being attached to the impeller.

Description

Technical Field

[0001] The utility model relates to the field of feeders, in particular to a labyrinth sealed rotary feeder. Background Art

[0002] A rotary feeder is a device that intermittently feeds materials by rotating an impeller. For example, the rotary feeder disclosed in the authorization announcement number CN209411333U includes a valve body, an impeller, and a driving device. A feeding cavity is provided in the valve body, and a feed port and a discharge port connected to the feeding cavity are provided on the valve body. The impeller is provided in the feeding cavity, and a plurality of blades are provided at intervals in the circumferential direction of the impeller, and two adjacent blades form a feeding trough. The patent realizes intermittent feeding by rotating the impeller.

[0003] However, in the current rotary feeder, the impeller and the valve body are connected by a shaft. If the fed material is a powder with a small particle size, the powder can easily enter between the impeller and the valve body, or between the shaft and the valve body, affecting the rotation of the impeller. Utility Model Content

[0004] (I) Purpose of the utility model

[0005] In view of this, the purpose of the utility model is to provide a labyrinth seal type rotary feeder to prevent powder from entering between the impeller and the valve body and causing clogging of the impeller.

[0006] (II) Technical solution

[0007] In order to achieve the above technical purpose, the utility model provides a labyrinth sealed rotary feeder:

[0008] It includes: a box body with two ends connected for feeding and discharging materials; a side box plate fixed to the side of the box body; an impeller rotatably connected to the box body for intermittent feeding, the outer surfaces of both sides of the impeller are provided with wedge-shaped surfaces, and side sealing plates are fixed on the inner walls of the side box plates, the outer shape of the side sealing plates is consistent with the wedge-shaped surfaces, and a cavity is formed between the side box plates and the impeller; an air inlet nozzle is fixed to the side box plate, and the inner cavity of the air inlet nozzle is connected to the cavity.

[0009] Preferably, a rotating shaft is fixed through the middle of the impeller, and the impeller is rotatably connected to the side box plate via the rotating shaft.

[0010] Preferably, a bearing is sleeved on the outer surface of the rotating shaft, and the rotating shaft is rotatably connected to the side box plate via the bearing.

[0011] Preferably, a bearing cover is fixed to the end of the side box plate away from the impeller, and the bearing cover abuts against the bearing.

[0012] Preferably, skeleton oil seals are provided on both sides of the bearing, and the rotating shaft is rotatably sealedly connected to the skeleton oil seal.

[0013] Preferably, at least two skeleton oil seals are provided between the bearing and the impeller.

[0014] Preferably, a pneumatic sealing ring is provided between the plurality of skeleton oil seals, and the rotating shaft is rotatably and sealingly connected to the pneumatic sealing ring.

[0015] Preferably, a sprocket is fixed to the end of the rotating shaft.

[0016] Preferably, a sprocket cover is sleeved on the outer surface of the sprocket, and the sprocket cover is fixed on the side box plate.

[0017] It can be seen from the above technical solutions that the present application has the following beneficial effects:

[0018] 1: A wedge-shaped surface is opened on the edge of the impeller and covered by a side sealing plate. A cavity is formed between the impeller and the side box plate. Gas can be injected into the cavity through an air inlet nozzle. The gas can be blown into the box body through the side sealing plate and the wedge-shaped surface to prevent powder from entering between the impeller and the side box plate. At the same time, the gas entering the box body can promote material falling and prevent powder from adhering to the impeller.

[0019] 2: Multiple skeleton oil seals are connected by rotating seals on the impeller, and pneumatic sealing rings are provided between the multiple skeleton oil seals. The skeleton oil seals and pneumatic sealing rings cooperate to seal between the rotating shaft and the side box plate, thereby improving the sealing between the rotating shaft and the side box plate and further preventing the powder from affecting the rotation of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0022] Figure 2 The utility model provides Figure 1 A schematic cross-sectional structure diagram of ;

[0023] Figure 3 The utility model provides Figure 2 The enlarged structural diagram at A in the middle;

[0024] Figure 4 The utility model provides Figure 1 Schematic diagram of the overall structure of the middle impeller;

[0025] Figure 5 This is a schematic cross-sectional structural diagram of the second embodiment provided by the utility model.

[0026] Description of the drawings: 1. Box body; 101. Side box plate; 101a. Air inlet nozzle; 101b. Bearing cover; 102. Side sealing plate; 103. Cavity; 2. Impeller; 201. Rotating shaft; 202. Wedge surface; 201a. Sprocket; 3. Bearing; 4. Skeleton oil seal; 5. Pneumatic sealing ring; 6. Sprocket cover. DETAILED DESCRIPTION

[0027] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and use. It should be understood that in all of these figures, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0028] Embodiment 1

[0029] See also Figure 1 , Figure 2 and Figure 4 As shown, a labyrinth sealed rotary feeder comprises: a box body 1, both ends of which are connected for feeding and discharging materials; a side box plate 101, fixed to the side of the box body 1; an impeller 2, rotatably connected to the box body 1, for intermittent feeding; illustratively, the top of the box body 1 is used to connect with an external feeding device, and the bottom is connected with an external receiving device, and the surface of the impeller 2 is evenly provided with receiving grooves, and when the impeller 2 rotates and faces the external feeding device, the material falls into the receiving groove, and the impeller 2 continues to rotate until the receiving groove filled with the material faces the external receiving device, and the material can fall into the external receiving device under its own weight to realize feeding;

[0030] For details, see Figure 1 , Figure 2 and Figure 3 As shown, both sides of the outer surface of the impeller 2 are provided with a wedge-shaped surface 202, and a side sealing plate 102 is fixed on the inner wall of the side box plate 101, and the shape of the side sealing plate 102 is consistent with the wedge-shaped surface 202, see Figure 3As shown, the purpose is that the powder can fall onto the impeller 2 along the side sealing plate 102 to prevent the powder from entering between the impeller 2 and the side box plate 101, and a cavity 103 is formed between the side box plate 101 and the impeller 2; the air inlet nozzle 101a is fixed on the side box plate 101, and the inner cavity of the air inlet nozzle 101a is connected to the cavity 103, and the air inlet nozzle 101a is used to connect to an external air source. The purpose is that by injecting gas into the cavity 103, the gas can be blown out from between the side sealing plate 102 and the wedge-shaped surface 202 to prevent the powder from entering between the impeller 2 and the side box plate 101 when the impeller 2 is fed, and the blown gas is blown obliquely onto the impeller 2 along the wedge-shaped surface 202, which can just blow the powder on the impeller 2 away from the impeller 2 to prevent the powder from adhering to the impeller 2.

[0031] For more details, see Figure 2 As shown, a rotating shaft 201 is fixed through the middle of the impeller 2, and the impeller 2 is rotatably connected to the side box plate 101 through the rotating shaft 201. A sprocket 201a is fixed to the end of the rotating shaft 201. The sprocket 201a is used to be linked to the output end of an external driving device, such as a motor, through a chain. The driving device drives the sprocket 201a to rotate, and the impeller 2 can be driven to rotate through the rotating shaft 201.

[0032] Embodiment 2

[0033] See also Figure 5 As shown, the outer surface of the rotating shaft 201 is sleeved with a bearing 3, and the rotating shaft 201 is rotatably connected to the side box plate 101 through the bearing 3, thereby reducing the rotation friction of the rotating shaft 201 and improving the rotation stability; a bearing pressure cover 101b is fixed to the end of the side box plate 101 away from the impeller 2, and the bearing pressure cover 101b is against the bearing 3 to limit the bearing 3.

[0034] For further information, see Figure 5 As shown, skeleton oil seals 4 are provided on both sides of the bearing 3, and the rotating shaft 201 is rotatably sealedly connected to the skeleton oil seal 4, thereby improving the sealing performance between the rotating shaft 201 and the side box plate 101.

[0035] For details, see Figure 5 As shown, at least two skeleton oil seals 4 are arranged between the bearing 3 and the impeller 2 to form a labyrinth sealing effect. Even if some dust enters between the rotating shaft 201 and the side box plate 101, it is difficult for the dust to affect the bearing 3 after being sealed by multiple skeleton oil seals 4.

[0036] For further information, see Figure 5As shown, a pneumatic sealing ring 5 is provided between the multiple skeleton oil seals 4, and the rotating shaft 201 is rotatably sealedly connected to the pneumatic sealing ring 5, and the pneumatic sealing ring 5 is connected to an air intake pipe, which passes through and is fixed on the side box plate 101. The air intake pipe is connected to an external air source, and an inert gas is injected into the pneumatic sealing ring 5. The gas seal can be used in conjunction with the skeleton oil seal 4 to further improve the sealing between the rotating shaft 201 and the side box plate 101.

[0037] It is worth mentioning that see Figure 5 As shown, the outer surface of the sprocket 201a is sleeved with a sprocket cover 6, which is fixed on the side box plate 101. The sprocket cover 6 is used to prevent dust from falling onto the sprocket 201a.

[0038] The exemplary implementation scheme of the present disclosure is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the protection scope of the present disclosure, which is determined by the attached claims.

Claims

1. A labyrinth seal rotary feeder, characterized in that: include: The box body (1) has two connected ends and is used for feeding and discharging materials; A side box plate (101) is fixed to the side of the box body (1); An impeller (2) is rotatably connected to the box body (1) and is used for intermittent feeding. The outer surfaces of both sides of the impeller (2) are provided with wedge-shaped surfaces (202). A side sealing plate (102) is fixed on the inner wall of the side box plate (101). The outer shape of the side sealing plate (102) matches the wedge-shaped surface (202). A cavity (103) is formed between the side box plate (101) and the impeller (2); The air inlet nozzle (101a) is fixed on the side box plate (101), and the inner cavity of the air inlet nozzle (101a) is communicated with the cavity (103).

2. A labyrinth seal rotary feeder according to claim 1, characterized in that: A rotating shaft (201) is fixedly passed through the middle of the impeller (2), and the impeller (2) is rotatably connected to the side box plate (101) via the rotating shaft (201).

3. A labyrinth seal rotary feeder according to claim 2, characterized in that: The outer surface of the rotating shaft (201) is sleeved with a bearing (3), and the rotating shaft (201) is rotatably connected to the side box plate (101) via the bearing (3).

4. A labyrinth seal rotary feeder according to claim 3, characterized in that: A bearing pressure cover (101b) is fixed to the end of the side box plate (101) away from the impeller (2), and the bearing pressure cover (101b) abuts against the bearing (3).

5. The labyrinth seal rotary feeder according to claim 3, characterized in that: Skeleton oil seals (4) are provided on both sides of the bearing (3), and the rotating shaft (201) is rotatably sealedly connected to the skeleton oil seal (4).

6. A labyrinth seal type rotary feeder according to claim 5, characterized in that: At least two skeleton oil seals (4) are provided between the bearing (3) and the impeller (2).

7. A labyrinth seal rotary feeder according to claim 6, characterized in that: A pneumatic sealing ring (5) is provided between the plurality of skeleton oil seals (4), and the rotating shaft (201) is rotatably sealedly connected to the pneumatic sealing ring (5).

8. The labyrinth seal rotary feeder according to claim 2, characterized in that: A sprocket (201a) is fixed to the end of the rotating shaft (201).

9. The labyrinth seal rotary feeder according to claim 8, characterized in that: The outer surface of the sprocket (201a) is sleeved with a sprocket cover (6), and the sprocket cover (6) is fixed on the side box plate (101).

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