Nonmetal screw rod and screw feeder comprising same

Abstract

The utility model discloses a non-metal screw rod and a screw feeder comprising the same. The non-metal screw rod comprises a rotating shaft made of metal materials and a spiral sleeve made of non-metal materials. The working section of the rotating shaft is positioned in a shell of the screw feeder; the spiral sleeve is installed on the periphery of the working section. The spiral sleeve comprises an input section, a discharging section and a tail inverted section which are connected in sequence; the input section, the discharge section and the tail inverted section are respectively composed of one or more short shaft sections which are axially connected; the input section and the tail inverted section are both provided with spiral blades, the spiral directions of the spiral blades are opposite, and the discharging section is of a polished shaft structure and right faces an outlet of the spiral feeder. Compared with the prior art, the non-metal screw rod is formed by splicing the rotating shaft made of metal and the short shaft sections made of non-metal, the manufacturing period is short, the machining cost is low, the structural strength is better, the short shaft sections with different screw pitches can be replaced according to the conveying precision requirement, the application range is wider, and use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of quantitative material transportation, in particular to a non-metallic screw and a screw feeder comprising the same. Background Art

[0002] The screws in traditional screw feeders are all machined into a spiral shape using a whole non-metallic bar, which has a long production cycle, a lot of material waste, and a high processing cost. In addition, the screw needs to be replaced as a whole when it is damaged, and the maintenance cost is high, which leads to a very high overall price of the screw feeder. In addition, the screw feeder needs to adjust the pitch size according to different conveying accuracies, and screws with different pitches need to be purchased for different production lines, which is costly. Utility Model Content

[0003] In order to solve the technical problems that the screws in the prior art screw feeders are all made of a whole non-metallic bar machined into a spiral shape, which has a long production cycle, a lot of material waste and a high processing cost, the utility model provides a non-metallic screw and a screw feeder containing the same to solve the above problems.

[0004] The utility model provides a non-metallic screw, comprising a rotating shaft made of metal material and a spiral sleeve made of non-metallic material; the working section of the rotating shaft is located in the shell of a screw feeder; the spiral sleeve is installed on the outer periphery of the working section, so that the contact surface between the non-metallic screw and the material is a non-metallic surface.

[0005] The spiral sleeve comprises an input section, a discharge section and a tail inverted section which are connected in sequence; the input section, the discharge section and the tail inverted section are respectively composed of one or more short shaft sections which are axially connected; the input section and the tail inverted section are both provided with spiral blades with opposite spiral directions, the discharge section is a smooth axis structure, and is directly opposite to the outlet of the screw feeder.

[0006] Furthermore, the input section includes a plurality of feed sections and a plurality of intermediate sections, and the pitch of the spiral blades on the feed sections is smaller than the pitch of the spiral blades on the intermediate sections.

[0007] Furthermore, the input section and the tail inverted section both include a sleeve and spiral blades located on the surface of the sleeve, and the spiral blades of adjacent sleeves in the input section are connected in sequence to form a continuous spiral structure.

[0008] Furthermore, each short shaft section in the spiral sleeve is fixed to the rotating shaft by bolts.

[0009] Furthermore, the short shaft segments at both ends of the spiral sleeve are fixed to the rotating shaft by bolts, and the short shaft segment in the middle is connected to the rotating shaft by a key.

[0010] Furthermore, the number of the feed sections is 6-8, the number of the middle sections is 5-8, and the number of the tail inverted sections is one.

[0011] Furthermore, both ends of each spiral blade have cutting surfaces on the outside, and the spiral lengths of the two cutting surfaces are equal, and the cutting surfaces at one end of two adjacent short shaft segments are butted against each other.

[0012] Furthermore, the cutting surfaces at both ends of the spiral blade are in the same axial direction.

[0013] The utility model also provides a screw feeder, comprising the non-metallic screw mentioned above.

[0014] The beneficial effects of the utility model are:

[0015] (1) The utility model adopts a rotating shaft made of metal and several short shaft segments made of non-metallic materials to form a non-metallic screw. Compared with the traditional process, the production cycle is short, the processing cost is low, the structural strength is better, and the short shaft segments with different pitches can be replaced according to the requirements of conveying accuracy. The scope of application is wider and the use is more convenient.

[0016] (2) The spiral sleeve in the utility model conveys materials to the outlet through the input section, discharges materials in the discharge section, and pushes the materials in the reverse direction through the tail inversion section, thereby preventing the materials from accumulating at the end of the screw conveyor cavity and extending the service life of the shaft end seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a front view of a specific embodiment of the non-metallic screw described in the utility model;

[0019] Figure 2 yes Figure 1 AA section view;

[0020] Figure 3 It is a stereogram of the feeding section in the utility model;

[0021] Figure 4 It is the front view of the feeding section in the utility model.

[0022] In the figure, 1, rotating shaft, 101, working section, 2, spiral sleeve, 201, input section, 2011, feeding section, 2012, middle section, 202, discharge section, 203, tail inverted section, 3, spiral blade, 4, sleeve, 5, cutting surface. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] A screw feeder usually includes a housing, a driving device and a screw. The housing is provided with a feed port and a discharge port. The screw is located inside the housing and is driven to rotate by the driving device. The spiral blades 3 on the screw are used to quantitatively convey materials. The amount of material conveyed at a single time is related to the pitch of the spiral blades 3.

[0025] The utility model improves the screw in the screw feeder, improves the traditional machined non-metal screw into a spliced ​​non-metal screw, and optimizes the design in detail for the specific screw form.

[0026] like Figure 1-Figure 3 As shown, a non-metallic screw includes a rotating shaft 1 made of metal material and a spiral sleeve 2 made of non-metallic material; the working section 101 of the rotating shaft 1 is located in the housing of the screw feeder; the rotating shaft 1 made of metal material can make the structural strength of the non-metallic screw better. The spiral sleeve 2 is installed on the outer periphery of the working section 101, so that the contact surface between the non-metallic screw and the material is a non-metallic surface.

[0027] The spiral sleeve 2 is a spliced ​​structure, comprising an input section 201, a discharge section 202 and a tail inverted section 203 connected in sequence; the input section 201, the discharge section 202 and the tail inverted section 203 are respectively composed of one or more short shaft sections connected axially; the input section 201 and the tail inverted section 203 are both provided with spiral blades 3 and the spiral directions are opposite, the discharge section 202 is a smooth axis structure, and is directly opposite to the outlet of the screw feeder. The spiral blade 3 can push the material forward when the non-metallic screw rotates. The spiral blade 3 is not set on the discharge section 202 to leave space for the discharge of the material. The input section 201 and the tail inverted section 203 are located at both ends of the discharge section 202, and are both used to push the material to the outlet of the screw feeder, that is, to transport it to the discharge section 202. The conveying section transports the material entering from the feed port of the screw feeder to the outlet, and the tail inverted section 203 is used to push the material moving to the end of the shell in the reverse direction to avoid the material being trapped in the shell, improve the conveying accuracy, and reduce the risk of blockage.

[0028] Since the utility model adopts several short shaft segments to form the spiral sleeve 2, it is convenient to disassemble and assemble, and short shaft segments with different pitches can be selected according to actual transportation requirements. A set of devices can be used in various working conditions, thereby reducing production costs.

[0029] In a specific embodiment of the utility model, the input section 201 includes a plurality of feed sections 2011 and a plurality of intermediate sections 2012. The pitch of the spiral blades 3 on the feed sections 2011 is smaller than the pitch of the spiral blades 3 on the intermediate sections 2012. Each feed section 2011 and each intermediate section 2012 is a short axis section. The pitch of the feed section 2011 is smaller, which can reduce the conveying speed and avoid material accumulation at the feed port.

[0030] The input section 201 and the tail inverted section 203 both include a sleeve 4 and a spiral blade 3 located on the surface of the sleeve 4. The spiral blades 3 of adjacent sleeves 4 in the input section 201 are connected in sequence to form a continuous spiral structure. The sleeve 4 is sleeved on the surface of the shaft 1 to cover the working section 101 of the shaft 1. The discharge section 202 is a light axis structure, so it only has the sleeve 4. Figure 1 and Figure 2 As shown, each feed section 2011 and middle section 2012 is composed of a sleeve 4 and a spiral blade 3.

[0031] In a preferred embodiment, each spiral blade 3 has a cutting surface 5 on both ends of the outer side, and the spiral lengths of the two cutting surfaces 5 are equal, and the cutting surfaces 5 at one end of two adjacent short shaft segments are butted. Figure 3 and Figure 4 As shown, both ends of the spiral blade 3 on the feed section 2011 have cutting surfaces 5 respectively, and the cutting surfaces 5 are aligned with the end surface of the sleeve 4. When docking with the adjacent feed section 2011, the cutting surfaces 5 on the adjacent feed section 2011 fit together. Similarly, both ends of the spiral blade 3 on the middle section 2012 and the tail inverted section 203 also have cutting surfaces 5 respectively, and the cutting surfaces 5 are aligned with the end surface of the sleeve 4 where they are located, which not only avoids the protruding sharp corners of a single short axis section, but also increases the smoothness of the connection between adjacent short axis sections.

[0032] Since the spiral blades 3 of each short shaft segment need to be connected in sequence, in order to be able to batch produce the feed segments 2011 and the middle segments 2012, the structures of each feed segment 2011 and each middle segment 2012 are preferably the same. In a further design, the cutting surfaces 5 at both ends of the spiral blade 3 are in the same axial direction. Figure 4 As shown, the starting ends of the cutting surfaces 5 at both ends of each feed section 2011 are located on the same axis.

[0033] In a preferred embodiment, there are 6-8 feeding sections 2011, 5-8 middle sections 2012, and one tail inverted section 203. Figure 1 As shown, there are 6 feed sections 2011, 5 middle sections 2012, and one tail inverted section 203.

[0034] Fixing of spiral sleeve 2 and rotating shaft 1 (taking bolt connection as an example):

[0035] The first method is to fix each short shaft segment in the spiral sleeve 2 to the rotating shaft 1 by bolt connection (it can also be pin connection). At this time, it is necessary to process mounting holes on the sleeve 4 of each short shaft segment, and corresponding threaded holes are also required on the rotating shaft 1.

[0036] The second method is that the short shaft segments at both ends of the spiral sleeve 2 are fixed to the rotating shaft 1 by bolts, and the short shaft segment in the middle is connected to the rotating shaft 1 by keys. In this case, it is only necessary to process mounting holes on the short shaft segments at both ends, and the sleeves 4 of the other short shaft segments only need to be provided with keys or keyways on the inside for proper positioning.

[0037] In the description of the present invention, it is necessary to understand that the terms "inside", "outside", "axial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0039] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0040] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A non-metallic screw, characterized in that: It comprises a rotating shaft (1) made of a metal material and a spiral sleeve (2) made of a non-metallic material; the working section (101) of the rotating shaft (1) is located in the housing of the spiral feeder; the spiral sleeve (2) is installed on the outer periphery of the working section (101), so that the contact surface between the non-metallic screw and the material is a non-metallic surface; The spiral sleeve (2) comprises an input section (201), a discharge section (202) and a tail inverted section (203) which are connected in sequence; the input section (201), the discharge section (202) and the tail inverted section (203) are respectively composed of one or more short shaft sections which are connected axially; the input section (201) and the tail inverted section (203) are both provided with spiral blades (3) with opposite spiral directions; the discharge section (202) is a smooth axis structure and is directly opposite to the outlet of the spiral feeder.

2. The non-metallic screw according to claim 1, characterized in that: The input section (201) comprises a plurality of feed sections (2011) and a plurality of intermediate sections (2012), wherein the pitch of the spiral blades (3) on the feed sections (2011) is smaller than the pitch of the spiral blades (3) on the intermediate sections (2012).

3. The non-metallic screw according to claim 1, characterized in that: The input section (201) and the tail inverted section (203) both comprise a sleeve (4) and spiral blades (3) located on the surface of the sleeve (4); the spiral blades (3) of adjacent sleeves (4) in the input section (201) are connected in sequence to form a continuous spiral structure.

4. The non-metallic screw according to claim 1, characterized in that: Each short shaft section in the spiral sleeve (2) is connected and fixed to the rotating shaft (1) by means of bolts.

5. The non-metallic screw according to claim 1, characterized in that: The short shaft sections at both ends of the spiral sleeve (2) are connected and fixed to the rotating shaft (1) by bolts, and the short shaft section in the middle is connected to the rotating shaft (1) by a key.

6. The non-metallic screw according to claim 2, characterized in that: The number of the feed sections (2011) is 6-8, the number of the middle sections (2012) is 5-8, and the number of the tail inverted section (203) is one.

7. The non-metallic screw according to claim 2, characterized in that: Each spiral blade (3) has cutting surfaces (5) on the outer sides of both ends, and the spiral lengths of the two cutting surfaces (5) are equal, and the cutting surfaces (5) at one end of two adjacent short shaft sections are butted.

8. The non-metallic screw according to claim 7, characterized in that: The cutting surfaces (5) at both ends of the spiral blade (3) are located in the same axial direction.

9. A screw feeder, characterized in that: The non-metallic screw comprises the non-metallic screw described in any one of claims 1 to 8.

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